Portstewart weather by month

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

Temperature
Rainfall
Sunshine & daylight
UV levels & humidity

Temperature in Portstewart (°C)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Max temperature (daytime)	7	7	9	11	13	16	17	17	15	13	9	8
Min temperature (night-time)	1	1	2	4	6	8	10	10	9	7	4	2
Heat & Humidity	0	0	0	0	0	0	0	0	0	0	0	0
Sea temperature	9	8	7	8	9	11	13	14	14	13	12	10

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	1	2	3	5	6	5	4	4	3	2	2	1
Daily hours of daylight	8	10	12	14	16	17	17	15	13	10	8	7
UV Index (Maximum)	0	1	2	3	5	5	6	5	3	2	1	0

Rainfall in Portstewart

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Number of days with some rain	22	17	20	16	17	16	18	19	20	22	21	22
Average monthly rainfall (mm)	118	79	91	65	66	70	77	92	107	124	115	113

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.

Portstewart weather in January

Expect daytime maximum temperatures of 7°C in Portstewart, Northern Ireland in January based on long-term weather averages. There is 1 hour of sunshine per day on average with 22 days with some rainfall and typically 118 mm of rainfall in the month.

7
7°C max day temperature
1
1 hour of sunshine per day
22
22 days with some rainfall
1
1°C min night temperature
8
8 hours of daylight per day
0
No heat & humidity
118
118 mm of monthly rainfall
0
No UV (Maximum) Index UV index
9
9°C sea temperature

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Portstewart weather in February

Expect daytime maximum temperatures of 7°C in Portstewart, Northern Ireland in February based on long-term weather averages. There are 2 hours of sunshine per day on average with 17 days with some rainfall and typically 79 mm of rainfall in the month.

7
7°C max day temperature
2
2 hours of sunshine per day
17
17 days with some rainfall
1
1°C min night temperature
10
10 hours of daylight per day
0
No heat & humidity
79
79 mm of monthly rainfall
1
1 (Low) UV index
8
8°C sea temperature

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Portstewart weather in March

Expect daytime maximum temperatures of 9°C in Portstewart, Northern Ireland in March based on long-term weather averages. There are 3 hours of sunshine per day on average with 20 days with some rainfall and typically 91 mm of rainfall in the month.

9
9°C max day temperature
3
3 hours of sunshine per day
20
20 days with some rainfall
2
2°C min night temperature
12
12 hours of daylight per day
0
No heat & humidity
91
91 mm of monthly rainfall
2
2 (Low) UV index
7
7°C sea temperature

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Portstewart weather in April

Expect daytime maximum temperatures of 11°C in Portstewart, Northern Ireland in April based on long-term weather averages. There are 5 hours of sunshine per day on average with 16 days with some rainfall and typically 65 mm of rainfall in the month.

11
11°C max day temperature
5
5 hours of sunshine per day
16
16 days with some rainfall
4
4°C min night temperature
14
14 hours of daylight per day
0
No heat & humidity
65
65 mm of monthly rainfall
3
3 (Moderate) UV index
8
8°C sea temperature

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Portstewart weather in May

Expect daytime maximum temperatures of 13°C in Portstewart, Northern Ireland in May based on long-term weather averages. There are 6 hours of sunshine per day on average with 17 days with some rainfall and typically 66 mm of rainfall in the month.

13
13°C max day temperature
6
6 hours of sunshine per day
17
17 days with some rainfall
6
6°C min night temperature
16
16 hours of daylight per day
0
No heat & humidity
66
66 mm of monthly rainfall
5
5 (Moderate) UV index
9
9°C sea temperature

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Portstewart weather in June

Expect daytime maximum temperatures of 16°C in Portstewart, Northern Ireland in June based on long-term weather averages. There are 5 hours of sunshine per day on average with 16 days with some rainfall and typically 70 mm of rainfall in the month.

16
16°C max day temperature
5
5 hours of sunshine per day
16
16 days with some rainfall
8
8°C min night temperature
17
17 hours of daylight per day
0
No heat & humidity
70
70 mm of monthly rainfall
5
5 (Moderate) UV index
11
11°C sea temperature

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Portstewart weather in July

Expect daytime maximum temperatures of 17°C in Portstewart, Northern Ireland in July based on long-term weather averages. There are 4 hours of sunshine per day on average with 18 days with some rainfall and typically 77 mm of rainfall in the month.

17
17°C max day temperature
4
4 hours of sunshine per day
18
18 days with some rainfall
10
10°C min night temperature
17
17 hours of daylight per day
0
No heat & humidity
77
77 mm of monthly rainfall
6
6 (High) UV index
13
13°C sea temperature

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Portstewart weather in August

Expect daytime maximum temperatures of 17°C in Portstewart, Northern Ireland in August based on long-term weather averages. There are 4 hours of sunshine per day on average with 19 days with some rainfall and typically 92 mm of rainfall in the month.

17
17°C max day temperature
4
4 hours of sunshine per day
19
19 days with some rainfall
10
10°C min night temperature
15
15 hours of daylight per day
0
No heat & humidity
92
92 mm of monthly rainfall
5
5 (Moderate) UV index
14
14°C sea temperature

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Portstewart weather in September

Expect daytime maximum temperatures of 15°C in Portstewart, Northern Ireland in September based on long-term weather averages. There are 3 hours of sunshine per day on average with 20 days with some rainfall and typically 107 mm of rainfall in the month.

15
15°C max day temperature
3
3 hours of sunshine per day
20
20 days with some rainfall
9
9°C min night temperature
13
13 hours of daylight per day
0
No heat & humidity
107
107 mm of monthly rainfall
3
3 (Moderate) UV index
14
14°C sea temperature

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Portstewart weather in October

Expect daytime maximum temperatures of 13°C in Portstewart, Northern Ireland in October based on long-term weather averages. There are 2 hours of sunshine per day on average with 22 days with some rainfall and typically 124 mm of rainfall in the month.

13
13°C max day temperature
2
2 hours of sunshine per day
22
22 days with some rainfall
7
7°C min night temperature
10
10 hours of daylight per day
0
No heat & humidity
124
124 mm of monthly rainfall
2
2 (Low) UV index
13
13°C sea temperature

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Portstewart weather in November

Expect daytime maximum temperatures of 9°C in Portstewart, Northern Ireland in November based on long-term weather averages. There are 2 hours of sunshine per day on average with 21 days with some rainfall and typically 115 mm of rainfall in the month.

9
9°C max day temperature
2
2 hours of sunshine per day
21
21 days with some rainfall
4
4°C min night temperature
8
8 hours of daylight per day
0
No heat & humidity
115
115 mm of monthly rainfall
1
1 (Low) UV index
12
12°C sea temperature

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Portstewart weather in December

Expect daytime maximum temperatures of 8°C in Portstewart, Northern Ireland in December based on long-term weather averages. There is 1 hour of sunshine per day on average with 22 days with some rainfall and typically 113 mm of rainfall in the month.