Colwyn Bay weather by month

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

Temperature in Colwyn Bay (°F)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
45°F maximum daytime temperature in January in Colwyn Bay45
45°F maximum daytime temperature in February in Colwyn Bay45
46°F maximum daytime temperature in March in Colwyn Bay46
52°F maximum daytime temperature in April in Colwyn Bay52
57°F maximum daytime temperature in May in Colwyn Bay57
63°F maximum daytime temperature in June in Colwyn Bay63
64°F maximum daytime temperature in July in Colwyn Bay64
64°F maximum daytime temperature in August in Colwyn Bay64
61°F maximum daytime temperature in September in Colwyn Bay61
55°F maximum daytime temperature in October in Colwyn Bay55
50°F maximum daytime temperature in November in Colwyn Bay50
46°F maximum daytime temperature in December in Colwyn Bay46
Min temperature (night-time)
36°F minimum night-time temperature in January in Colwyn Bay36
34°F minimum night-time temperature in February in Colwyn Bay34
37°F minimum night-time temperature in March in Colwyn Bay37
39°F minimum night-time temperature in April in Colwyn Bay39
43°F minimum night-time temperature in May in Colwyn Bay43
48°F minimum night-time temperature in June in Colwyn Bay48
52°F minimum night-time temperature in July in Colwyn Bay52
52°F minimum night-time temperature in August in Colwyn Bay52
50°F minimum night-time temperature in September in Colwyn Bay50
45°F minimum night-time temperature in October in Colwyn Bay45
39°F minimum night-time temperature in November in Colwyn Bay39
37°F minimum night-time temperature in December in Colwyn Bay37
Heat & Humidity
No heat & humidity in January in Colwyn Bay0
No heat & humidity in February in Colwyn Bay0
No heat & humidity in March in Colwyn Bay0
No heat & humidity in April in Colwyn Bay0
No heat & humidity in May in Colwyn Bay0
No heat & humidity in June in Colwyn Bay0
No heat & humidity in July in Colwyn Bay0
No heat & humidity in August in Colwyn Bay0
No heat & humidity in September in Colwyn Bay0
No heat & humidity in October in Colwyn Bay0
No heat & humidity in November in Colwyn Bay0
No heat & humidity in December in Colwyn Bay0
Sea temperature
45°F sea temperature in January in Colwyn Bay45
43°F sea temperature in February in Colwyn Bay43
43°F sea temperature in March in Colwyn Bay43
46°F sea temperature in April in Colwyn Bay46
52°F sea temperature in May in Colwyn Bay52
55°F sea temperature in June in Colwyn Bay55
59°F sea temperature in July in Colwyn Bay59
61°F sea temperature in August in Colwyn Bay61
61°F sea temperature in September in Colwyn Bay61
57°F sea temperature in October in Colwyn Bay57
52°F sea temperature in November in Colwyn Bay52
48°F sea temperature in December in Colwyn Bay48

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

Sunshine & UV index in Colwyn Bay

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
8 hours of daylight per day in January in Colwyn Bay8
10 hours of daylight per day in February in Colwyn Bay10
12 hours of daylight per day in March in Colwyn Bay12
14 hours of daylight per day in April in Colwyn Bay14
16 hours of daylight per day in May in Colwyn Bay16
17 hours of daylight per day in June in Colwyn Bay17
16 hours of daylight per day in July in Colwyn Bay16
15 hours of daylight per day in August in Colwyn Bay15
13 hours of daylight per day in September in Colwyn Bay13
11 hours of daylight per day in October in Colwyn Bay11
9 hours of daylight per day in November in Colwyn Bay9
8 hours of daylight per day in December in Colwyn Bay8
UV Index (Maximum)
No UV (maximum) index in January in Colwyn Bay0
UV (maximum) index 1 (Low) in February in Colwyn Bay1
UV (maximum) index 2 (Low) in March in Colwyn Bay2
UV (maximum) index 4 (Moderate) in April in Colwyn Bay4
UV (maximum) index 5 (Moderate) in May in Colwyn Bay5
UV (maximum) index 6 (High) in June in Colwyn Bay6
UV (maximum) index 6 (High) in July in Colwyn Bay6
UV (maximum) index 5 (Moderate) in August in Colwyn Bay5
UV (maximum) index 4 (Moderate) in September in Colwyn Bay4
UV (maximum) index 2 (Low) in October in Colwyn Bay2
UV (maximum) index 1 (Low) in November in Colwyn Bay1
No UV (maximum) index in December in Colwyn Bay0

Rainfall in Colwyn Bay

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
21 days with some rainfall in January in Colwyn Bay21
16 days with some rainfall in February in Colwyn Bay16
18 days with some rainfall in March in Colwyn Bay18
15 days with some rainfall in April in Colwyn Bay15
16 days with some rainfall in May in Colwyn Bay16
15 days with some rainfall in June in Colwyn Bay15
14 days with some rainfall in July in Colwyn Bay14
16 days with some rainfall in August in Colwyn Bay16
16 days with some rainfall in September in Colwyn Bay16
19 days with some rainfall in October in Colwyn Bay19
20 days with some rainfall in November in Colwyn Bay20
20 days with some rainfall in December in Colwyn Bay20
Average monthly rainfall (inches)
5.0 inches monthly rainfall in January in Colwyn Bay5.0
3.5 inches monthly rainfall in February in Colwyn Bay3.5
3.8 inches monthly rainfall in March in Colwyn Bay3.8
2.7 inches monthly rainfall in April in Colwyn Bay2.7
2.9 inches monthly rainfall in May in Colwyn Bay2.9
2.7 inches monthly rainfall in June in Colwyn Bay2.7
2.5 inches monthly rainfall in July in Colwyn Bay2.5
3.4 inches monthly rainfall in August in Colwyn Bay3.4
4.1 inches monthly rainfall in September in Colwyn Bay4.1
5.0 inches monthly rainfall in October in Colwyn Bay5.0
5.6 inches monthly rainfall in November in Colwyn Bay5.6
5.5 inches monthly rainfall in December in Colwyn Bay5.5

More about Colwyn Bay

Colwyn Bay by month

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

Recommended for Wales

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  • Travel before 20th March 2026 (inclusive)

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The climate guide for Wales (Colwyn Bay) 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 Colwyn Bay?

Colwyn Bay has a temperate climate with warm summers and some rainfall in all months.

Colwyn Bay weather in January

Expect daytime maximum temperatures of 45°F in Colwyn Bay, Wales in January based on long-term weather averages. There are 2 hours of sunshine per day on average with 21 days with some rainfall and typically 5.0 inches of rainfall in the month.

  • 45°F maximum daytime temperature in January in Colwyn Bay45
    45°F max day temperature
  • 2 hours of sunshine per day
  • 21 days with some rainfall in January in Colwyn Bay21
    21 days with some rainfall
  • 36°F minimum night-time temperature in January in Colwyn Bay36
    36°F min night temperature
  • 8 hours of daylight per day in January in Colwyn Bay8
    8 hours of daylight per day
  • No heat & humidity in January in Colwyn Bay0
    No heat & humidity
  • 5.0 inches monthly rainfall in January in Colwyn Bay5.0
    5.0 inches of monthly rainfall
  • No UV (maximum) index in January in Colwyn Bay0
    No UV (Maximum) Index UV index
  • 45°F sea temperature in January in Colwyn Bay45
    45°F sea temperature

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Colwyn Bay weather in February

Expect daytime maximum temperatures of 45°F in Colwyn Bay, Wales in February based on long-term weather averages. There are 2 hours of sunshine per day on average with 16 days with some rainfall and typically 3.5 inches of rainfall in the month.

  • 45°F maximum daytime temperature in February in Colwyn Bay45
    45°F max day temperature
  • 2 hours of sunshine per day
  • 16 days with some rainfall in February in Colwyn Bay16
    16 days with some rainfall
  • 34°F minimum night-time temperature in February in Colwyn Bay34
    34°F min night temperature
  • 10 hours of daylight per day in February in Colwyn Bay10
    10 hours of daylight per day
  • No heat & humidity in February in Colwyn Bay0
    No heat & humidity
  • 3.5 inches monthly rainfall in February in Colwyn Bay3.5
    3.5 inches of monthly rainfall
  • UV (maximum) index 1 (Low) in February in Colwyn Bay1
    1 (Low) UV index
  • 43°F sea temperature in February in Colwyn Bay43
    43°F sea temperature

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Colwyn Bay weather in March

Expect daytime maximum temperatures of 46°F in Colwyn Bay, Wales in March based on long-term weather averages. There are 3 hours of sunshine per day on average with 18 days with some rainfall and typically 3.8 inches of rainfall in the month.

  • 46°F maximum daytime temperature in March in Colwyn Bay46
    46°F max day temperature
  • 3 hours of sunshine per day
  • 18 days with some rainfall in March in Colwyn Bay18
    18 days with some rainfall
  • 37°F minimum night-time temperature in March in Colwyn Bay37
    37°F min night temperature
  • 12 hours of daylight per day in March in Colwyn Bay12
    12 hours of daylight per day
  • No heat & humidity in March in Colwyn Bay0
    No heat & humidity
  • 3.8 inches monthly rainfall in March in Colwyn Bay3.8
    3.8 inches of monthly rainfall
  • UV (maximum) index 2 (Low) in March in Colwyn Bay2
    2 (Low) UV index
  • 43°F sea temperature in March in Colwyn Bay43
    43°F sea temperature

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Colwyn Bay weather in April

Expect daytime maximum temperatures of 52°F in Colwyn Bay, Wales in April based on long-term weather averages. There are 5 hours of sunshine per day on average with 15 days with some rainfall and typically 2.7 inches of rainfall in the month.

  • 52°F maximum daytime temperature in April in Colwyn Bay52
    52°F max day temperature
  • 5 hours of sunshine per day
  • 15 days with some rainfall in April in Colwyn Bay15
    15 days with some rainfall
  • 39°F minimum night-time temperature in April in Colwyn Bay39
    39°F min night temperature
  • 14 hours of daylight per day in April in Colwyn Bay14
    14 hours of daylight per day
  • No heat & humidity in April in Colwyn Bay0
    No heat & humidity
  • 2.7 inches monthly rainfall in April in Colwyn Bay2.7
    2.7 inches of monthly rainfall
  • UV (maximum) index 4 (Moderate) in April in Colwyn Bay4
    4 (Moderate) UV index
  • 46°F sea temperature in April in Colwyn Bay46
    46°F sea temperature

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Colwyn Bay weather in May

Expect daytime maximum temperatures of 57°F in Colwyn Bay, Wales in May based on long-term weather averages. There are 6 hours of sunshine per day on average with 16 days with some rainfall and typically 2.9 inches of rainfall in the month.

  • 57°F maximum daytime temperature in May in Colwyn Bay57
    57°F max day temperature
  • 6 hours of sunshine per day
  • 16 days with some rainfall in May in Colwyn Bay16
    16 days with some rainfall
  • 43°F minimum night-time temperature in May in Colwyn Bay43
    43°F min night temperature
  • 16 hours of daylight per day in May in Colwyn Bay16
    16 hours of daylight per day
  • No heat & humidity in May in Colwyn Bay0
    No heat & humidity
  • 2.9 inches monthly rainfall in May in Colwyn Bay2.9
    2.9 inches of monthly rainfall
  • UV (maximum) index 5 (Moderate) in May in Colwyn Bay5
    5 (Moderate) UV index
  • 52°F sea temperature in May in Colwyn Bay52
    52°F sea temperature

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Colwyn Bay weather in June

Expect daytime maximum temperatures of 63°F in Colwyn Bay, Wales in June based on long-term weather averages. There are 6 hours of sunshine per day on average with 15 days with some rainfall and typically 2.7 inches of rainfall in the month.

  • 63°F maximum daytime temperature in June in Colwyn Bay63
    63°F max day temperature
  • 6 hours of sunshine per day
  • 15 days with some rainfall in June in Colwyn Bay15
    15 days with some rainfall
  • 48°F minimum night-time temperature in June in Colwyn Bay48
    48°F min night temperature
  • 17 hours of daylight per day in June in Colwyn Bay17
    17 hours of daylight per day
  • No heat & humidity in June in Colwyn Bay0
    No heat & humidity
  • 2.7 inches monthly rainfall in June in Colwyn Bay2.7
    2.7 inches of monthly rainfall
  • UV (maximum) index 6 (High) in June in Colwyn Bay6
    6 (High) UV index
  • 55°F sea temperature in June in Colwyn Bay55
    55°F sea temperature

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Colwyn Bay weather in July

Expect daytime maximum temperatures of 64°F in Colwyn Bay, Wales in July based on long-term weather averages. There are 6 hours of sunshine per day on average with 14 days with some rainfall and typically 2.5 inches of rainfall in the month.

  • 64°F maximum daytime temperature in July in Colwyn Bay64
    64°F max day temperature
  • 6 hours of sunshine per day
  • 14 days with some rainfall in July in Colwyn Bay14
    14 days with some rainfall
  • 52°F minimum night-time temperature in July in Colwyn Bay52
    52°F min night temperature
  • 16 hours of daylight per day in July in Colwyn Bay16
    16 hours of daylight per day
  • No heat & humidity in July in Colwyn Bay0
    No heat & humidity
  • 2.5 inches monthly rainfall in July in Colwyn Bay2.5
    2.5 inches of monthly rainfall
  • UV (maximum) index 6 (High) in July in Colwyn Bay6
    6 (High) UV index
  • 59°F sea temperature in July in Colwyn Bay59
    59°F sea temperature

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Colwyn Bay weather in August

Expect daytime maximum temperatures of 64°F in Colwyn Bay, Wales in August based on long-term weather averages. There are 5 hours of sunshine per day on average with 16 days with some rainfall and typically 3.4 inches of rainfall in the month.

  • 64°F maximum daytime temperature in August in Colwyn Bay64
    64°F max day temperature
  • 5 hours of sunshine per day
  • 16 days with some rainfall in August in Colwyn Bay16
    16 days with some rainfall
  • 52°F minimum night-time temperature in August in Colwyn Bay52
    52°F min night temperature
  • 15 hours of daylight per day in August in Colwyn Bay15
    15 hours of daylight per day
  • No heat & humidity in August in Colwyn Bay0
    No heat & humidity
  • 3.4 inches monthly rainfall in August in Colwyn Bay3.4
    3.4 inches of monthly rainfall
  • UV (maximum) index 5 (Moderate) in August in Colwyn Bay5
    5 (Moderate) UV index
  • 61°F sea temperature in August in Colwyn Bay61
    61°F sea temperature

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Colwyn Bay weather in September

Expect daytime maximum temperatures of 61°F in Colwyn Bay, Wales in September based on long-term weather averages. There are 4 hours of sunshine per day on average with 16 days with some rainfall and typically 4.1 inches of rainfall in the month.

  • 61°F maximum daytime temperature in September in Colwyn Bay61
    61°F max day temperature
  • 4 hours of sunshine per day
  • 16 days with some rainfall in September in Colwyn Bay16
    16 days with some rainfall
  • 50°F minimum night-time temperature in September in Colwyn Bay50
    50°F min night temperature
  • 13 hours of daylight per day in September in Colwyn Bay13
    13 hours of daylight per day
  • No heat & humidity in September in Colwyn Bay0
    No heat & humidity
  • 4.1 inches monthly rainfall in September in Colwyn Bay4.1
    4.1 inches of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Colwyn Bay4
    4 (Moderate) UV index
  • 61°F sea temperature in September in Colwyn Bay61
    61°F sea temperature

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Colwyn Bay weather in October

Expect daytime maximum temperatures of 55°F in Colwyn Bay, Wales in October based on long-term weather averages. There are 3 hours of sunshine per day on average with 19 days with some rainfall and typically 5.0 inches of rainfall in the month.

  • 55°F maximum daytime temperature in October in Colwyn Bay55
    55°F max day temperature
  • 3 hours of sunshine per day
  • 19 days with some rainfall in October in Colwyn Bay19
    19 days with some rainfall
  • 45°F minimum night-time temperature in October in Colwyn Bay45
    45°F min night temperature
  • 11 hours of daylight per day in October in Colwyn Bay11
    11 hours of daylight per day
  • No heat & humidity in October in Colwyn Bay0
    No heat & humidity
  • 5.0 inches monthly rainfall in October in Colwyn Bay5.0
    5.0 inches of monthly rainfall
  • UV (maximum) index 2 (Low) in October in Colwyn Bay2
    2 (Low) UV index
  • 57°F sea temperature in October in Colwyn Bay57
    57°F sea temperature

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Colwyn Bay weather in November

Expect daytime maximum temperatures of 50°F in Colwyn Bay, Wales in November based on long-term weather averages. There are 2 hours of sunshine per day on average with 20 days with some rainfall and typically 5.6 inches of rainfall in the month.

  • 50°F maximum daytime temperature in November in Colwyn Bay50
    50°F max day temperature
  • 2 hours of sunshine per day
  • 20 days with some rainfall in November in Colwyn Bay20
    20 days with some rainfall
  • 39°F minimum night-time temperature in November in Colwyn Bay39
    39°F min night temperature
  • 9 hours of daylight per day in November in Colwyn Bay9
    9 hours of daylight per day
  • No heat & humidity in November in Colwyn Bay0
    No heat & humidity
  • 5.6 inches monthly rainfall in November in Colwyn Bay5.6
    5.6 inches of monthly rainfall
  • UV (maximum) index 1 (Low) in November in Colwyn Bay1
    1 (Low) UV index
  • 52°F sea temperature in November in Colwyn Bay52
    52°F sea temperature

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Colwyn Bay weather in December

Expect daytime maximum temperatures of 46°F in Colwyn Bay, Wales in December based on long-term weather averages. There is 1 hour of sunshine per day on average with 20 days with some rainfall and typically 5.5 inches of rainfall in the month.

  • 46°F maximum daytime temperature in December in Colwyn Bay46
    46°F max day temperature
  • 1 hour of sunshine per day
  • 20 days with some rainfall in December in Colwyn Bay20
    20 days with some rainfall
  • 37°F minimum night-time temperature in December in Colwyn Bay37
    37°F min night temperature
  • 8 hours of daylight per day in December in Colwyn Bay8
    8 hours of daylight per day
  • No heat & humidity in December in Colwyn Bay0
    No heat & humidity
  • 5.5 inches monthly rainfall in December in Colwyn Bay5.5
    5.5 inches of monthly rainfall
  • No UV (maximum) index in December in Colwyn Bay0
    No UV (Maximum) Index UV index
  • 48°F sea temperature in December in Colwyn Bay48
    48°F sea temperature

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More about Colwyn Bay

Colwyn Bay by month

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

Recommended for Wales

  • Book hotels in the UK for £35 or less (London from £49)
  • Prices based on lowest saver room rates. T&Cs apply
  • Travel before 20th March 2026 (inclusive)

Expires at 23:59 on Friday 20th Mar 2026 · View all Travelodge offers

TravelodgeHotel deal finder

The climate guide for Wales (Colwyn Bay) 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)  |  Imperial (°F)

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Compare Colwyn Bay weather with the UK

The weather chart below compares the average monthly maximum daytime temperature for Colwyn Bay, Conwy, Wales and the UK (London).

Maximum daytime temperature (°F)

Colwyn Bay, Conwy, Wales
UK (London)
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C)  |  Imperial (°F)

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