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 (°F)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Max temperature (daytime)	45	45	48	52	55	61	63	63	59	55	48	46
Min temperature (night-time)	34	34	36	39	43	46	50	50	48	45	39	36
Heat & Humidity	0	0	0	0	0	0	0	0	0	0	0	0
Sea temperature	48	46	45	46	48	52	55	57	57	55	54	50

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 (inches)	4.6	3.1	3.6	2.6	2.6	2.8	3.0	3.6	4.2	4.9	4.5	4.4

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 45°F 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 4.6 inches of rainfall in the month.

45
45°F max day temperature
1
1 hour of sunshine per day
22
22 days with some rainfall
34
34°F min night temperature
8
8 hours of daylight per day
0
No heat & humidity
4.6
4.6 inches of monthly rainfall
0
No UV (Maximum) Index UV index
48
48°F sea temperature

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Portstewart weather in February

Expect daytime maximum temperatures of 45°F 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 3.1 inches of rainfall in the month.

45
45°F max day temperature
2
2 hours of sunshine per day
17
17 days with some rainfall
34
34°F min night temperature
10
10 hours of daylight per day
0
No heat & humidity
3.1
3.1 inches of monthly rainfall
1
1 (Low) UV index
46
46°F sea temperature

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Portstewart weather in March

Expect daytime maximum temperatures of 48°F 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 3.6 inches of rainfall in the month.

48
48°F max day temperature
3
3 hours of sunshine per day
20
20 days with some rainfall
36
36°F min night temperature
12
12 hours of daylight per day
0
No heat & humidity
3.6
3.6 inches of monthly rainfall
2
2 (Low) UV index
45
45°F sea temperature

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Portstewart weather in April

Expect daytime maximum temperatures of 52°F 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 2.6 inches of rainfall in the month.

52
52°F max day temperature
5
5 hours of sunshine per day
16
16 days with some rainfall
39
39°F min night temperature
14
14 hours of daylight per day
0
No heat & humidity
2.6
2.6 inches of monthly rainfall
3
3 (Moderate) UV index
46
46°F sea temperature

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Portstewart weather in May

Expect daytime maximum temperatures of 55°F 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 2.6 inches of rainfall in the month.

55
55°F max day temperature
6
6 hours of sunshine per day
17
17 days with some rainfall
43
43°F min night temperature
16
16 hours of daylight per day
0
No heat & humidity
2.6
2.6 inches of monthly rainfall
5
5 (Moderate) UV index
48
48°F sea temperature

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Portstewart weather in June

Expect daytime maximum temperatures of 61°F 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 2.8 inches of rainfall in the month.

61
61°F max day temperature
5
5 hours of sunshine per day
16
16 days with some rainfall
46
46°F min night temperature
17
17 hours of daylight per day
0
No heat & humidity
2.8
2.8 inches of monthly rainfall
5
5 (Moderate) UV index
52
52°F sea temperature

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Portstewart weather in July

Expect daytime maximum temperatures of 63°F 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 3.0 inches of rainfall in the month.

63
63°F max day temperature
4
4 hours of sunshine per day
18
18 days with some rainfall
50
50°F min night temperature
17
17 hours of daylight per day
0
No heat & humidity
3.0
3.0 inches of monthly rainfall
6
6 (High) UV index
55
55°F sea temperature

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Portstewart weather in August

Expect daytime maximum temperatures of 63°F 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 3.6 inches of rainfall in the month.

63
63°F max day temperature
4
4 hours of sunshine per day
19
19 days with some rainfall
50
50°F min night temperature
15
15 hours of daylight per day
0
No heat & humidity
3.6
3.6 inches of monthly rainfall
5
5 (Moderate) UV index
57
57°F sea temperature

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Portstewart weather in September

Expect daytime maximum temperatures of 59°F 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 4.2 inches of rainfall in the month.

59
59°F max day temperature
3
3 hours of sunshine per day
20
20 days with some rainfall
48
48°F min night temperature
13
13 hours of daylight per day
0
No heat & humidity
4.2
4.2 inches of monthly rainfall
3
3 (Moderate) UV index
57
57°F sea temperature

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Portstewart weather in October

Expect daytime maximum temperatures of 55°F 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 4.9 inches of rainfall in the month.

55
55°F max day temperature
2
2 hours of sunshine per day
22
22 days with some rainfall
45
45°F min night temperature
10
10 hours of daylight per day
0
No heat & humidity
4.9
4.9 inches of monthly rainfall
2
2 (Low) UV index
55
55°F sea temperature

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Portstewart weather in November

Expect daytime maximum temperatures of 48°F 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 4.5 inches of rainfall in the month.

48
48°F max day temperature
2
2 hours of sunshine per day
21
21 days with some rainfall
39
39°F min night temperature
8
8 hours of daylight per day
0
No heat & humidity
4.5
4.5 inches of monthly rainfall
1
1 (Low) UV index
54
54°F sea temperature

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Portstewart weather in December

Expect daytime maximum temperatures of 46°F 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 4.4 inches of rainfall in the month.