Swansea weather by month

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

Temperature in Swansea (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
7°C maximum daytime temperature in January in Swansea7
7°C maximum daytime temperature in February in Swansea7
9°C maximum daytime temperature in March in Swansea9
12°C maximum daytime temperature in April in Swansea12
15°C maximum daytime temperature in May in Swansea15
18°C maximum daytime temperature in June in Swansea18
20°C maximum daytime temperature in July in Swansea20
20°C maximum daytime temperature in August in Swansea20
17°C maximum daytime temperature in September in Swansea17
14°C maximum daytime temperature in October in Swansea14
11°C maximum daytime temperature in November in Swansea11
8°C maximum daytime temperature in December in Swansea8
Min temperature (night-time)
3°C minimum night-time temperature in January in Swansea3
3°C minimum night-time temperature in February in Swansea3
4°C minimum night-time temperature in March in Swansea4
5°C minimum night-time temperature in April in Swansea5
8°C minimum night-time temperature in May in Swansea8
11°C minimum night-time temperature in June in Swansea11
13°C minimum night-time temperature in July in Swansea13
13°C minimum night-time temperature in August in Swansea13
11°C minimum night-time temperature in September in Swansea11
9°C minimum night-time temperature in October in Swansea9
5°C minimum night-time temperature in November in Swansea5
4°C minimum night-time temperature in December in Swansea4
Heat & Humidity
No heat & humidity in January in Swansea0
No heat & humidity in February in Swansea0
No heat & humidity in March in Swansea0
No heat & humidity in April in Swansea0
No heat & humidity in May in Swansea0
No heat & humidity in June in Swansea0
No heat & humidity in July in Swansea0
No heat & humidity in August in Swansea0
No heat & humidity in September in Swansea0
No heat & humidity in October in Swansea0
No heat & humidity in November in Swansea0
No heat & humidity in December in Swansea0
Sea temperature
8°C sea temperature in January in Swansea8
8°C sea temperature in February in Swansea8
8°C sea temperature in March in Swansea8
9°C sea temperature in April in Swansea9
11°C sea temperature in May in Swansea11
14°C sea temperature in June in Swansea14
16°C sea temperature in July in Swansea16
18°C sea temperature in August in Swansea18
17°C sea temperature in September in Swansea17
15°C sea temperature in October in Swansea15
12°C sea temperature in November in Swansea12
10°C sea temperature in December in Swansea10

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

Sunshine & Daylight in Swansea

  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 Swansea8
10 hours of daylight per day in February in Swansea10
12 hours of daylight per day in March in Swansea12
14 hours of daylight per day in April in Swansea14
16 hours of daylight per day in May in Swansea16
17 hours of daylight per day in June in Swansea17
16 hours of daylight per day in July in Swansea16
15 hours of daylight per day in August in Swansea15
13 hours of daylight per day in September in Swansea13
11 hours of daylight per day in October in Swansea11
9 hours of daylight per day in November in Swansea9
8 hours of daylight per day in December in Swansea8
UV Index (Maximum)
UV (maximum) index 1 (Low) in January in Swansea1
UV (maximum) index 1 (Low) in February in Swansea1
UV (maximum) index 2 (Low) in March in Swansea2
UV (maximum) index 4 (Moderate) in April in Swansea4
UV (maximum) index 5 (Moderate) in May in Swansea5
UV (maximum) index 6 (High) in June in Swansea6
UV (maximum) index 6 (High) in July in Swansea6
UV (maximum) index 6 (High) in August in Swansea6
UV (maximum) index 4 (Moderate) in September in Swansea4
UV (maximum) index 2 (Low) in October in Swansea2
UV (maximum) index 1 (Low) in November in Swansea1
No UV (maximum) index in December in Swansea0

Rainfall in Swansea

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
20 days with some rainfall in January in Swansea20
15 days with some rainfall in February in Swansea15
18 days with some rainfall in March in Swansea18
14 days with some rainfall in April in Swansea14
15 days with some rainfall in May in Swansea15
15 days with some rainfall in June in Swansea15
13 days with some rainfall in July in Swansea13
16 days with some rainfall in August in Swansea16
16 days with some rainfall in September in Swansea16
19 days with some rainfall in October in Swansea19
20 days with some rainfall in November in Swansea20
20 days with some rainfall in December in Swansea20
Average monthly rainfall (mm)
133 mm monthly rainfall in January in Swansea133
89 mm monthly rainfall in February in Swansea89
96 mm monthly rainfall in March in Swansea96
69 mm monthly rainfall in April in Swansea69
77 mm monthly rainfall in May in Swansea77
78 mm monthly rainfall in June in Swansea78
75 mm monthly rainfall in July in Swansea75
103 mm monthly rainfall in August in Swansea103
111 mm monthly rainfall in September in Swansea111
130 mm monthly rainfall in October in Swansea130
138 mm monthly rainfall in November in Swansea138
140 mm monthly rainfall in December in Swansea140

More about Swansea

Swansea by month

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

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The climate guide for Wales (Swansea) 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 Swansea?

Swansea 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 Wales

Compare Swansea with the UK

Below the Swansea chart shows average maximum daytime temperature for Swansea, Wales, UK and the UK (London).

Maximum daytime temperature (°C)

Swansea, Wales, UK
UK (London)
7
7
7
7
9
10
12
13
15
17
18
20
20
22
20
22
17
19
14
15
11
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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