Portstewart weather by month

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

Temperature in Portstewart (°F)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
45°F maximum daytime temperature in January in Portstewart45
45°F maximum daytime temperature in February in Portstewart45
48°F maximum daytime temperature in March in Portstewart48
52°F maximum daytime temperature in April in Portstewart52
55°F maximum daytime temperature in May in Portstewart55
61°F maximum daytime temperature in June in Portstewart61
63°F maximum daytime temperature in July in Portstewart63
63°F maximum daytime temperature in August in Portstewart63
59°F maximum daytime temperature in September in Portstewart59
55°F maximum daytime temperature in October in Portstewart55
48°F maximum daytime temperature in November in Portstewart48
46°F maximum daytime temperature in December in Portstewart46
Min temperature (night-time)
34°F minimum night-time temperature in January in Portstewart34
34°F minimum night-time temperature in February in Portstewart34
36°F minimum night-time temperature in March in Portstewart36
39°F minimum night-time temperature in April in Portstewart39
43°F minimum night-time temperature in May in Portstewart43
46°F minimum night-time temperature in June in Portstewart46
50°F minimum night-time temperature in July in Portstewart50
50°F minimum night-time temperature in August in Portstewart50
48°F minimum night-time temperature in September in Portstewart48
45°F minimum night-time temperature in October in Portstewart45
39°F minimum night-time temperature in November in Portstewart39
36°F minimum night-time temperature in December in Portstewart36
Heat & Humidity
No heat & humidity in January in Portstewart0
No heat & humidity in February in Portstewart0
No heat & humidity in March in Portstewart0
No heat & humidity in April in Portstewart0
No heat & humidity in May in Portstewart0
No heat & humidity in June in Portstewart0
No heat & humidity in July in Portstewart0
No heat & humidity in August in Portstewart0
No heat & humidity in September in Portstewart0
No heat & humidity in October in Portstewart0
No heat & humidity in November in Portstewart0
No heat & humidity in December in Portstewart0
Sea temperature
48°F sea temperature in January in Portstewart48
46°F sea temperature in February in Portstewart46
45°F sea temperature in March in Portstewart45
46°F sea temperature in April in Portstewart46
48°F sea temperature in May in Portstewart48
52°F sea temperature in June in Portstewart52
55°F sea temperature in July in Portstewart55
57°F sea temperature in August in Portstewart57
57°F sea temperature in September in Portstewart57
55°F sea temperature in October in Portstewart55
54°F sea temperature in November in Portstewart54
50°F sea temperature in December in Portstewart50

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

Sunshine & Daylight in Portstewart

  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 Portstewart8
10 hours of daylight per day in February in Portstewart10
12 hours of daylight per day in March in Portstewart12
14 hours of daylight per day in April in Portstewart14
16 hours of daylight per day in May in Portstewart16
17 hours of daylight per day in June in Portstewart17
17 hours of daylight per day in July in Portstewart17
15 hours of daylight per day in August in Portstewart15
13 hours of daylight per day in September in Portstewart13
10 hours of daylight per day in October in Portstewart10
8 hours of daylight per day in November in Portstewart8
7 hours of daylight per day in December in Portstewart7
UV Index (Maximum)
No UV (maximum) index in January in Portstewart0
UV (maximum) index 1 (Low) in February in Portstewart1
UV (maximum) index 2 (Low) in March in Portstewart2
UV (maximum) index 3 (Moderate) in April in Portstewart3
UV (maximum) index 5 (Moderate) in May in Portstewart5
UV (maximum) index 5 (Moderate) in June in Portstewart5
UV (maximum) index 6 (High) in July in Portstewart6
UV (maximum) index 5 (Moderate) in August in Portstewart5
UV (maximum) index 3 (Moderate) in September in Portstewart3
UV (maximum) index 2 (Low) in October in Portstewart2
UV (maximum) index 1 (Low) in November in Portstewart1
No UV (maximum) index in December in Portstewart0

Rainfall in Portstewart

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
22 days with some rainfall in January in Portstewart22
17 days with some rainfall in February in Portstewart17
20 days with some rainfall in March in Portstewart20
16 days with some rainfall in April in Portstewart16
17 days with some rainfall in May in Portstewart17
16 days with some rainfall in June in Portstewart16
18 days with some rainfall in July in Portstewart18
19 days with some rainfall in August in Portstewart19
20 days with some rainfall in September in Portstewart20
22 days with some rainfall in October in Portstewart22
21 days with some rainfall in November in Portstewart21
22 days with some rainfall in December in Portstewart22
Average monthly rainfall (inches)
4.6 inches monthly rainfall in January in Portstewart4.6
3.1 inches monthly rainfall in February in Portstewart3.1
3.6 inches monthly rainfall in March in Portstewart3.6
2.6 inches monthly rainfall in April in Portstewart2.6
2.6 inches monthly rainfall in May in Portstewart2.6
2.8 inches monthly rainfall in June in Portstewart2.8
3.0 inches monthly rainfall in July in Portstewart3.0
3.6 inches monthly rainfall in August in Portstewart3.6
4.2 inches monthly rainfall in September in Portstewart4.2
4.9 inches monthly rainfall in October in Portstewart4.9
4.5 inches monthly rainfall in November in Portstewart4.5
4.4 inches monthly rainfall in December in Portstewart4.4

More about Portstewart

Portstewart by month

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

Recommended for Northern Ireland

VRBO: Top summer 2024/2025 holiday deals

  • Save on summer holiday accommodation with VRBO
  • Explore top deals on houses, apartments, cabins & more
  • Book holiday rentals in the UK, Europe & beyond
Go to VRBO deal >>

View all VRBO offers

The climate guide for Northern Ireland (Portstewart) 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 Portstewart?

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

Metric (°C)  |  Imperial (°F)

Back to top

Tropical storm risk: Portstewart hurricane season

% of month affected by tropical storms
0
0
0
0
0
0
0
0
0
0
0
0
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

TUI: up to 7% off holidays booked online

  • Book online with TUI & save up to 7% on holidays
  • FREE child places available for select holidays
  • Pay £0 deposits with direct debit & spread the cost
Go to TUI deal >>

View all TUI offers

TUITUI deal finder

Back to top

More about the UK

Compare Portstewart with the USA

Below the Portstewart chart shows average maximum daytime temperature for Portstewart, Coleraine, Northern Ireland and the USA (Washington).

Maximum daytime temperature (°F)

Portstewart, Coleraine, Northern Ireland
USA (Washington)
45
41
45
45
48
55
52
66
55
75
61
84
63
88
63
86
59
79
55
68
48
57
46
46
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C)  |  Imperial (°F)

Compare more Portstewart 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 ^