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 (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
7°C maximum daytime temperature in January in Portstewart7
7°C maximum daytime temperature in February in Portstewart7
9°C maximum daytime temperature in March in Portstewart9
11°C maximum daytime temperature in April in Portstewart11
13°C maximum daytime temperature in May in Portstewart13
16°C maximum daytime temperature in June in Portstewart16
17°C maximum daytime temperature in July in Portstewart17
17°C maximum daytime temperature in August in Portstewart17
15°C maximum daytime temperature in September in Portstewart15
13°C maximum daytime temperature in October in Portstewart13
9°C maximum daytime temperature in November in Portstewart9
8°C maximum daytime temperature in December in Portstewart8
Min temperature (night-time)
1°C minimum night-time temperature in January in Portstewart1
1°C minimum night-time temperature in February in Portstewart1
2°C minimum night-time temperature in March in Portstewart2
4°C minimum night-time temperature in April in Portstewart4
6°C minimum night-time temperature in May in Portstewart6
8°C minimum night-time temperature in June in Portstewart8
10°C minimum night-time temperature in July in Portstewart10
10°C minimum night-time temperature in August in Portstewart10
9°C minimum night-time temperature in September in Portstewart9
7°C minimum night-time temperature in October in Portstewart7
4°C minimum night-time temperature in November in Portstewart4
2°C minimum night-time temperature in December in Portstewart2
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
9°C sea temperature in January in Portstewart9
8°C sea temperature in February in Portstewart8
7°C sea temperature in March in Portstewart7
8°C sea temperature in April in Portstewart8
9°C sea temperature in May in Portstewart9
11°C sea temperature in June in Portstewart11
13°C sea temperature in July in Portstewart13
14°C sea temperature in August in Portstewart14
14°C sea temperature in September in Portstewart14
13°C sea temperature in October in Portstewart13
12°C sea temperature in November in Portstewart12
10°C sea temperature in December in Portstewart10

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 (mm)
118 mm monthly rainfall in January in Portstewart118
79 mm monthly rainfall in February in Portstewart79
91 mm monthly rainfall in March in Portstewart91
65 mm monthly rainfall in April in Portstewart65
66 mm monthly rainfall in May in Portstewart66
70 mm monthly rainfall in June in Portstewart70
77 mm monthly rainfall in July in Portstewart77
92 mm monthly rainfall in August in Portstewart92
107 mm monthly rainfall in September in Portstewart107
124 mm monthly rainfall in October in Portstewart124
115 mm monthly rainfall in November in Portstewart115
113 mm monthly rainfall in December in Portstewart113

More about Portstewart

Portstewart by month

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

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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 / mm)  |  Imperial (°F / inches)

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More about the UK

Compare Portstewart with the UK

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

Maximum daytime temperature (°C)

Portstewart, Coleraine, Northern Ireland
UK (London)
7
7
7
7
9
10
11
13
13
17
16
20
17
22
17
22
15
19
13
15
9
10
8
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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

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