Porthmadog weather by month

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

Temperature in Porthmadog (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
7°C maximum daytime temperature in January in Porthmadog7
7°C maximum daytime temperature in February in Porthmadog7
8°C maximum daytime temperature in March in Porthmadog8
11°C maximum daytime temperature in April in Porthmadog11
14°C maximum daytime temperature in May in Porthmadog14
17°C maximum daytime temperature in June in Porthmadog17
18°C maximum daytime temperature in July in Porthmadog18
18°C maximum daytime temperature in August in Porthmadog18
16°C maximum daytime temperature in September in Porthmadog16
13°C maximum daytime temperature in October in Porthmadog13
9°C maximum daytime temperature in November in Porthmadog9
8°C maximum daytime temperature in December in Porthmadog8
Min temperature (night-time)
2°C minimum night-time temperature in January in Porthmadog2
1°C minimum night-time temperature in February in Porthmadog1
2°C minimum night-time temperature in March in Porthmadog2
4°C minimum night-time temperature in April in Porthmadog4
6°C minimum night-time temperature in May in Porthmadog6
9°C minimum night-time temperature in June in Porthmadog9
11°C minimum night-time temperature in July in Porthmadog11
11°C minimum night-time temperature in August in Porthmadog11
9°C minimum night-time temperature in September in Porthmadog9
7°C minimum night-time temperature in October in Porthmadog7
4°C minimum night-time temperature in November in Porthmadog4
3°C minimum night-time temperature in December in Porthmadog3
Heat & Humidity
No heat & humidity in January in Porthmadog0
No heat & humidity in February in Porthmadog0
No heat & humidity in March in Porthmadog0
No heat & humidity in April in Porthmadog0
No heat & humidity in May in Porthmadog0
No heat & humidity in June in Porthmadog0
No heat & humidity in July in Porthmadog0
No heat & humidity in August in Porthmadog0
No heat & humidity in September in Porthmadog0
No heat & humidity in October in Porthmadog0
No heat & humidity in November in Porthmadog0
No heat & humidity in December in Porthmadog0
Sea temperature
7°C sea temperature in January in Porthmadog7
7°C sea temperature in February in Porthmadog7
7°C sea temperature in March in Porthmadog7
9°C sea temperature in April in Porthmadog9
12°C sea temperature in May in Porthmadog12
14°C sea temperature in June in Porthmadog14
16°C sea temperature in July in Porthmadog16
17°C sea temperature in August in Porthmadog17
16°C sea temperature in September in Porthmadog16
14°C sea temperature in October in Porthmadog14
11°C sea temperature in November in Porthmadog11
9°C sea temperature in December in Porthmadog9

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

Sunshine & Daylight in Porthmadog

  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 Porthmadog8
10 hours of daylight per day in February in Porthmadog10
12 hours of daylight per day in March in Porthmadog12
14 hours of daylight per day in April in Porthmadog14
16 hours of daylight per day in May in Porthmadog16
17 hours of daylight per day in June in Porthmadog17
16 hours of daylight per day in July in Porthmadog16
15 hours of daylight per day in August in Porthmadog15
13 hours of daylight per day in September in Porthmadog13
11 hours of daylight per day in October in Porthmadog11
9 hours of daylight per day in November in Porthmadog9
8 hours of daylight per day in December in Porthmadog8
UV Index (Maximum)
UV (maximum) index 1 (Low) in January in Porthmadog1
UV (maximum) index 1 (Low) in February in Porthmadog1
UV (maximum) index 2 (Low) in March in Porthmadog2
UV (maximum) index 4 (Moderate) in April in Porthmadog4
UV (maximum) index 5 (Moderate) in May in Porthmadog5
UV (maximum) index 6 (High) in June in Porthmadog6
UV (maximum) index 6 (High) in July in Porthmadog6
UV (maximum) index 5 (Moderate) in August in Porthmadog5
UV (maximum) index 4 (Moderate) in September in Porthmadog4
UV (maximum) index 2 (Low) in October in Porthmadog2
UV (maximum) index 1 (Low) in November in Porthmadog1
No UV (maximum) index in December in Porthmadog0

Rainfall in Porthmadog

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
21 days with some rainfall in January in Porthmadog21
16 days with some rainfall in February in Porthmadog16
18 days with some rainfall in March in Porthmadog18
15 days with some rainfall in April in Porthmadog15
16 days with some rainfall in May in Porthmadog16
14 days with some rainfall in June in Porthmadog14
13 days with some rainfall in July in Porthmadog13
16 days with some rainfall in August in Porthmadog16
16 days with some rainfall in September in Porthmadog16
18 days with some rainfall in October in Porthmadog18
20 days with some rainfall in November in Porthmadog20
20 days with some rainfall in December in Porthmadog20
Average monthly rainfall (mm)
180 mm monthly rainfall in January in Porthmadog180
122 mm monthly rainfall in February in Porthmadog122
141 mm monthly rainfall in March in Porthmadog141
99 mm monthly rainfall in April in Porthmadog99
96 mm monthly rainfall in May in Porthmadog96
98 mm monthly rainfall in June in Porthmadog98
101 mm monthly rainfall in July in Porthmadog101
135 mm monthly rainfall in August in Porthmadog135
151 mm monthly rainfall in September in Porthmadog151
184 mm monthly rainfall in October in Porthmadog184
198 mm monthly rainfall in November in Porthmadog198
202 mm monthly rainfall in December in Porthmadog202

More about Porthmadog

Porthmadog by month

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

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The climate guide for Wales (Porthmadog) 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 Porthmadog?

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

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

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Tropical storm risk: Porthmadog 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

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More about Wales

Compare Porthmadog with the USA

Below the Porthmadog chart shows average maximum daytime temperature for Porthmadog, Gwynedd, Wales and the USA (Washington).

Maximum daytime temperature (°C)

Porthmadog, Gwynedd, Wales
USA (Washington)
7
5
7
7
8
13
11
19
14
24
17
29
18
31
18
30
16
26
13
20
9
14
8
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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

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