Gros Islet weather by month

Check out Gros Islet weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature in Gros Islet (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
28°C maximum daytime temperature in January in Gros Islet28
28°C maximum daytime temperature in February in Gros Islet28
29°C maximum daytime temperature in March in Gros Islet29
29°C maximum daytime temperature in April in Gros Islet29
30°C maximum daytime temperature in May in Gros Islet30
30°C maximum daytime temperature in June in Gros Islet30
30°C maximum daytime temperature in July in Gros Islet30
30°C maximum daytime temperature in August in Gros Islet30
30°C maximum daytime temperature in September in Gros Islet30
30°C maximum daytime temperature in October in Gros Islet30
29°C maximum daytime temperature in November in Gros Islet29
29°C maximum daytime temperature in December in Gros Islet29
Min temperature (night-time)
22°C minimum night-time temperature in January in Gros Islet22
22°C minimum night-time temperature in February in Gros Islet22
22°C minimum night-time temperature in March in Gros Islet22
23°C minimum night-time temperature in April in Gros Islet23
24°C minimum night-time temperature in May in Gros Islet24
24°C minimum night-time temperature in June in Gros Islet24
25°C minimum night-time temperature in July in Gros Islet25
24°C minimum night-time temperature in August in Gros Islet24
24°C minimum night-time temperature in September in Gros Islet24
24°C minimum night-time temperature in October in Gros Islet24
23°C minimum night-time temperature in November in Gros Islet23
23°C minimum night-time temperature in December in Gros Islet23
Heat & Humidity
Moderate heat & humidity in January in Gros IsletM
Moderate heat & humidity in February in Gros IsletM
Moderate heat & humidity in March in Gros IsletM
High heat & humidity in April in Gros IsletH
High heat & humidity in May in Gros IsletH
High heat & humidity in June in Gros IsletH
High heat & humidity in July in Gros IsletH
Very high heat & humidity in August in Gros IsletVH
Very high heat & humidity in September in Gros IsletVH
High heat & humidity in October in Gros IsletH
High heat & humidity in November in Gros IsletH
Moderate heat & humidity in December in Gros IsletM
Sea temperature
27°C sea temperature in January in Gros Islet27
26°C sea temperature in February in Gros Islet26
26°C sea temperature in March in Gros Islet26
27°C sea temperature in April in Gros Islet27
27°C sea temperature in May in Gros Islet27
28°C sea temperature in June in Gros Islet28
28°C sea temperature in July in Gros Islet28
28°C sea temperature in August in Gros Islet28
29°C sea temperature in September in Gros Islet29
29°C sea temperature in October in Gros Islet29
28°C sea temperature in November in Gros Islet28
27°C sea temperature in December in Gros Islet27

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & Daylight in Gros Islet

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
11 hours of daylight per day in January in Gros Islet11
12 hours of daylight per day in February in Gros Islet12
12 hours of daylight per day in March in Gros Islet12
12 hours of daylight per day in April in Gros Islet12
13 hours of daylight per day in May in Gros Islet13
13 hours of daylight per day in June in Gros Islet13
13 hours of daylight per day in July in Gros Islet13
13 hours of daylight per day in August in Gros Islet13
12 hours of daylight per day in September in Gros Islet12
12 hours of daylight per day in October in Gros Islet12
11 hours of daylight per day in November in Gros Islet11
11 hours of daylight per day in December in Gros Islet11
UV Index (Maximum)
UV (maximum) index 9 (Very High) in January in Gros Islet9
UV (maximum) index 11 (Extreme) in February in Gros Islet11
UV (maximum) index 11+ (Extreme) in March in Gros Islet11
UV (maximum) index 11+ (Extreme) in April in Gros Islet11
UV (maximum) index 11+ (Extreme) in May in Gros Islet11
UV (maximum) index 11+ (Extreme) in June in Gros Islet11
UV (maximum) index 11+ (Extreme) in July in Gros Islet11
UV (maximum) index 11+ (Extreme) in August in Gros Islet11
UV (maximum) index 11+ (Extreme) in September in Gros Islet11
UV (maximum) index 11 (Extreme) in October in Gros Islet11
UV (maximum) index 9 (Very High) in November in Gros Islet9
UV (maximum) index 8 (Very High) in December in Gros Islet8

Rainfall in Gros Islet

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
17 days with some rainfall in January in Gros Islet17
13 days with some rainfall in February in Gros Islet13
13 days with some rainfall in March in Gros Islet13
11 days with some rainfall in April in Gros Islet11
15 days with some rainfall in May in Gros Islet15
19 days with some rainfall in June in Gros Islet19
21 days with some rainfall in July in Gros Islet21
20 days with some rainfall in August in Gros Islet20
25 days with some rainfall in September in Gros Islet25
18 days with some rainfall in October in Gros Islet18
19 days with some rainfall in November in Gros Islet19
18 days with some rainfall in December in Gros Islet18
Average monthly rainfall (mm)
113 mm monthly rainfall in January in Gros Islet113
86 mm monthly rainfall in February in Gros Islet86
76 mm monthly rainfall in March in Gros Islet76
96 mm monthly rainfall in April in Gros Islet96
124 mm monthly rainfall in May in Gros Islet124
182 mm monthly rainfall in June in Gros Islet182
245 mm monthly rainfall in July in Gros Islet245
216 mm monthly rainfall in August in Gros Islet216
224 mm monthly rainfall in September in Gros Islet224
269 mm monthly rainfall in October in Gros Islet269
255 mm monthly rainfall in November in Gros Islet255
149 mm monthly rainfall in December in Gros Islet149

More about Gros Islet

Gros Islet by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for St Lucia

Rentalcars.com: Discount car hire worldwide

  • Compare car hire prices to find best deal online
  • Book flexible bookings with free cancellation policy
  • No hidden fees + price match guarantee
Go to Rentalcars.com deal >>

View all Rentalcars.com offers

The climate guide for St Lucia (Gros Islet) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

What's the climate like in Gros Islet?

Gros Islet has a hot tropical climate with no dry season.

Gros Islet weather in January

Expect daytime maximum temperatures of 28°C in Gros Islet, St Lucia in January based on long-term weather averages. There are 8 hours of sunshine per day on average with 17 days with some rainfall and typically 113 mm of rainfall in the month.

  • 28°C maximum daytime temperature in January in Gros Islet28
    28°C max day temperature
  • 8 hours of sunshine per day
  • 17 days with some rainfall in January in Gros Islet17
    17 days with some rainfall
  • 22°C minimum night-time temperature in January in Gros Islet22
    22°C min night temperature
  • 11 hours of daylight per day in January in Gros Islet11
    11 hours of daylight per day
  • Moderate heat & humidity in January in Gros IsletM
    Moderate heat & humidity
  • 113 mm monthly rainfall in January in Gros Islet113
    113 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in January in Gros Islet9
    9 (Very High) UV index
  • 27°C sea temperature in January in Gros Islet27
    27°C sea temperature

Back to months

Gros Islet weather in February

Expect daytime maximum temperatures of 28°C in Gros Islet, St Lucia in February based on long-term weather averages. There are 8 hours of sunshine per day on average with 13 days with some rainfall and typically 86 mm of rainfall in the month.

  • 28°C maximum daytime temperature in February in Gros Islet28
    28°C max day temperature
  • 8 hours of sunshine per day
  • 13 days with some rainfall in February in Gros Islet13
    13 days with some rainfall
  • 22°C minimum night-time temperature in February in Gros Islet22
    22°C min night temperature
  • 12 hours of daylight per day in February in Gros Islet12
    12 hours of daylight per day
  • Moderate heat & humidity in February in Gros IsletM
    Moderate heat & humidity
  • 86 mm monthly rainfall in February in Gros Islet86
    86 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in February in Gros Islet11
    11 (Extreme) UV index
  • 26°C sea temperature in February in Gros Islet26
    26°C sea temperature

Back to months

Gros Islet weather in March

Expect daytime maximum temperatures of 29°C in Gros Islet, St Lucia in March based on long-term weather averages. There are 8 hours of sunshine per day on average with 13 days with some rainfall and typically 76 mm of rainfall in the month.

  • 29°C maximum daytime temperature in March in Gros Islet29
    29°C max day temperature
  • 8 hours of sunshine per day
  • 13 days with some rainfall in March in Gros Islet13
    13 days with some rainfall
  • 22°C minimum night-time temperature in March in Gros Islet22
    22°C min night temperature
  • 12 hours of daylight per day in March in Gros Islet12
    12 hours of daylight per day
  • Moderate heat & humidity in March in Gros IsletM
    Moderate heat & humidity
  • 76 mm monthly rainfall in March in Gros Islet76
    76 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in March in Gros Islet11
    11+ (Extreme) UV index
  • 26°C sea temperature in March in Gros Islet26
    26°C sea temperature

Back to months

Gros Islet weather in April

Expect daytime maximum temperatures of 29°C in Gros Islet, St Lucia in April and high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with 11 days with some rainfall and typically 96 mm of rainfall in the month.

  • 29°C maximum daytime temperature in April in Gros Islet29
    29°C max day temperature
  • 8 hours of sunshine per day
  • 11 days with some rainfall in April in Gros Islet11
    11 days with some rainfall
  • 23°C minimum night-time temperature in April in Gros Islet23
    23°C min night temperature
  • 12 hours of daylight per day in April in Gros Islet12
    12 hours of daylight per day
  • High heat & humidity in April in Gros IsletH
    High heat & humidity
  • 96 mm monthly rainfall in April in Gros Islet96
    96 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in April in Gros Islet11
    11+ (Extreme) UV index
  • 27°C sea temperature in April in Gros Islet27
    27°C sea temperature

Back to months

Gros Islet weather in May

Expect daytime maximum temperatures of 30°C in Gros Islet, St Lucia in May and high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with 15 days with some rainfall and typically 124 mm of rainfall in the month.

  • 30°C maximum daytime temperature in May in Gros Islet30
    30°C max day temperature
  • 8 hours of sunshine per day
  • 15 days with some rainfall in May in Gros Islet15
    15 days with some rainfall
  • 24°C minimum night-time temperature in May in Gros Islet24
    24°C min night temperature
  • 13 hours of daylight per day in May in Gros Islet13
    13 hours of daylight per day
  • High heat & humidity in May in Gros IsletH
    High heat & humidity
  • 124 mm monthly rainfall in May in Gros Islet124
    124 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in May in Gros Islet11
    11+ (Extreme) UV index
  • 27°C sea temperature in May in Gros Islet27
    27°C sea temperature

Back to months

Gros Islet weather in June

Expect daytime maximum temperatures of 30°C in Gros Islet, St Lucia in June and high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with 19 days with some rainfall and typically 182 mm of rainfall in the month.

  • 30°C maximum daytime temperature in June in Gros Islet30
    30°C max day temperature
  • 8 hours of sunshine per day
  • 19 days with some rainfall in June in Gros Islet19
    19 days with some rainfall
  • 24°C minimum night-time temperature in June in Gros Islet24
    24°C min night temperature
  • 13 hours of daylight per day in June in Gros Islet13
    13 hours of daylight per day
  • High heat & humidity in June in Gros IsletH
    High heat & humidity
  • 182 mm monthly rainfall in June in Gros Islet182
    182 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in June in Gros Islet11
    11+ (Extreme) UV index
  • 28°C sea temperature in June in Gros Islet28
    28°C sea temperature

Back to months

Gros Islet weather in July

Expect daytime maximum temperatures of 30°C in Gros Islet, St Lucia in July and high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with 21 days with some rainfall and typically 245 mm of rainfall in the month.

  • 30°C maximum daytime temperature in July in Gros Islet30
    30°C max day temperature
  • 8 hours of sunshine per day
  • 21 days with some rainfall in July in Gros Islet21
    21 days with some rainfall
  • 25°C minimum night-time temperature in July in Gros Islet25
    25°C min night temperature
  • 13 hours of daylight per day in July in Gros Islet13
    13 hours of daylight per day
  • High heat & humidity in July in Gros IsletH
    High heat & humidity
  • 245 mm monthly rainfall in July in Gros Islet245
    245 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in July in Gros Islet11
    11+ (Extreme) UV index
  • 28°C sea temperature in July in Gros Islet28
    28°C sea temperature

Back to months

Gros Islet weather in August

Expect daytime maximum temperatures of 30°C in Gros Islet, St Lucia in August and very high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with 20 days with some rainfall and typically 216 mm of rainfall in the month.

  • 30°C maximum daytime temperature in August in Gros Islet30
    30°C max day temperature
  • 8 hours of sunshine per day
  • 20 days with some rainfall in August in Gros Islet20
    20 days with some rainfall
  • 24°C minimum night-time temperature in August in Gros Islet24
    24°C min night temperature
  • 13 hours of daylight per day in August in Gros Islet13
    13 hours of daylight per day
  • Very high heat & humidity in August in Gros IsletVH
    Very High heat & humidity
  • 216 mm monthly rainfall in August in Gros Islet216
    216 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in August in Gros Islet11
    11+ (Extreme) UV index
  • 28°C sea temperature in August in Gros Islet28
    28°C sea temperature

Back to months

Gros Islet weather in September

Expect daytime maximum temperatures of 30°C in Gros Islet, St Lucia in September and very high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with 25 days with some rainfall and typically 224 mm of rainfall in the month.

  • 30°C maximum daytime temperature in September in Gros Islet30
    30°C max day temperature
  • 8 hours of sunshine per day
  • 25 days with some rainfall in September in Gros Islet25
    25 days with some rainfall
  • 24°C minimum night-time temperature in September in Gros Islet24
    24°C min night temperature
  • 12 hours of daylight per day in September in Gros Islet12
    12 hours of daylight per day
  • Very high heat & humidity in September in Gros IsletVH
    Very High heat & humidity
  • 224 mm monthly rainfall in September in Gros Islet224
    224 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Gros Islet11
    11+ (Extreme) UV index
  • 29°C sea temperature in September in Gros Islet29
    29°C sea temperature

Back to months

Gros Islet weather in October

Expect daytime maximum temperatures of 30°C in Gros Islet, St Lucia in October and high heat and humidity based on long-term weather averages. There are 7 hours of sunshine per day on average with 18 days with some rainfall and typically 269 mm of rainfall in the month.

  • 30°C maximum daytime temperature in October in Gros Islet30
    30°C max day temperature
  • 7 hours of sunshine per day
  • 18 days with some rainfall in October in Gros Islet18
    18 days with some rainfall
  • 24°C minimum night-time temperature in October in Gros Islet24
    24°C min night temperature
  • 12 hours of daylight per day in October in Gros Islet12
    12 hours of daylight per day
  • High heat & humidity in October in Gros IsletH
    High heat & humidity
  • 269 mm monthly rainfall in October in Gros Islet269
    269 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in October in Gros Islet11
    11 (Extreme) UV index
  • 29°C sea temperature in October in Gros Islet29
    29°C sea temperature

Back to months

Gros Islet weather in November

Expect daytime maximum temperatures of 29°C in Gros Islet, St Lucia in November and high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with 19 days with some rainfall and typically 255 mm of rainfall in the month.

  • 29°C maximum daytime temperature in November in Gros Islet29
    29°C max day temperature
  • 8 hours of sunshine per day
  • 19 days with some rainfall in November in Gros Islet19
    19 days with some rainfall
  • 23°C minimum night-time temperature in November in Gros Islet23
    23°C min night temperature
  • 11 hours of daylight per day in November in Gros Islet11
    11 hours of daylight per day
  • High heat & humidity in November in Gros IsletH
    High heat & humidity
  • 255 mm monthly rainfall in November in Gros Islet255
    255 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in November in Gros Islet9
    9 (Very High) UV index
  • 28°C sea temperature in November in Gros Islet28
    28°C sea temperature

Back to months

Gros Islet weather in December

Expect daytime maximum temperatures of 29°C in Gros Islet, St Lucia in December based on long-term weather averages. There are 8 hours of sunshine per day on average with 18 days with some rainfall and typically 149 mm of rainfall in the month.

  • 29°C maximum daytime temperature in December in Gros Islet29
    29°C max day temperature
  • 8 hours of sunshine per day
  • 18 days with some rainfall in December in Gros Islet18
    18 days with some rainfall
  • 23°C minimum night-time temperature in December in Gros Islet23
    23°C min night temperature
  • 11 hours of daylight per day in December in Gros Islet11
    11 hours of daylight per day
  • Moderate heat & humidity in December in Gros IsletM
    Moderate heat & humidity
  • 149 mm monthly rainfall in December in Gros Islet149
    149 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in December in Gros Islet8
    8 (Very High) UV index
  • 27°C sea temperature in December in Gros Islet27
    27°C sea temperature

Back to months

More about Gros Islet

Gros Islet by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for St Lucia

Marella Cruises: 4% off Caribbean cruises

  • Save 4% on Marella Cruises to the Caribbean
  • Book online with TUI to receive the discount
  • Travel before 31st October 2026 (inclusive)
Go to Marella Cruises deal >>

View all Marella Cruises offers

The climate guide for St Lucia (Gros Islet) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

Back to top

More about St Lucia

Compare Gros Islet with the UK

Below the Gros Islet chart shows average maximum daytime temperature for Gros Islet, St Lucia and the UK (London).

Maximum daytime temperature (°C)

Gros Islet, St Lucia
UK (London)
28
7
28
7
29
10
29
13
30
17
30
20
30
22
30
22
30
19
30
15
29
10
29
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C / mm)  |  Imperial (°F / inches)

Compare more Gros Islet weather >>

Back to top

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^