Caernarfon weather by month

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

Temperature in Caernarfon (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
7°C maximum daytime temperature in January in Caernarfon7
7°C maximum daytime temperature in February in Caernarfon7
8°C maximum daytime temperature in March in Caernarfon8
11°C maximum daytime temperature in April in Caernarfon11
14°C maximum daytime temperature in May in Caernarfon14
17°C maximum daytime temperature in June in Caernarfon17
18°C maximum daytime temperature in July in Caernarfon18
18°C maximum daytime temperature in August in Caernarfon18
16°C maximum daytime temperature in September in Caernarfon16
14°C maximum daytime temperature in October in Caernarfon14
10°C maximum daytime temperature in November in Caernarfon10
8°C maximum daytime temperature in December in Caernarfon8
Min temperature (night-time)
2°C minimum night-time temperature in January in Caernarfon2
2°C minimum night-time temperature in February in Caernarfon2
3°C minimum night-time temperature in March in Caernarfon3
4°C minimum night-time temperature in April in Caernarfon4
7°C minimum night-time temperature in May in Caernarfon7
9°C minimum night-time temperature in June in Caernarfon9
11°C minimum night-time temperature in July in Caernarfon11
11°C minimum night-time temperature in August in Caernarfon11
10°C minimum night-time temperature in September in Caernarfon10
8°C minimum night-time temperature in October in Caernarfon8
4°C minimum night-time temperature in November in Caernarfon4
3°C minimum night-time temperature in December in Caernarfon3
Heat & Humidity
No heat & humidity in January in Caernarfon0
No heat & humidity in February in Caernarfon0
No heat & humidity in March in Caernarfon0
No heat & humidity in April in Caernarfon0
No heat & humidity in May in Caernarfon0
No heat & humidity in June in Caernarfon0
No heat & humidity in July in Caernarfon0
No heat & humidity in August in Caernarfon0
No heat & humidity in September in Caernarfon0
No heat & humidity in October in Caernarfon0
No heat & humidity in November in Caernarfon0
No heat & humidity in December in Caernarfon0
Sea temperature
8°C sea temperature in January in Caernarfon8
7°C sea temperature in February in Caernarfon7
7°C sea temperature in March in Caernarfon7
8°C sea temperature in April in Caernarfon8
10°C sea temperature in May in Caernarfon10
13°C sea temperature in June in Caernarfon13
15°C sea temperature in July in Caernarfon15
16°C sea temperature in August in Caernarfon16
15°C sea temperature in September in Caernarfon15
14°C sea temperature in October in Caernarfon14
12°C sea temperature in November in Caernarfon12
10°C sea temperature in December in Caernarfon10

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

Sunshine & Daylight in Caernarfon

  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 Caernarfon8
10 hours of daylight per day in February in Caernarfon10
12 hours of daylight per day in March in Caernarfon12
14 hours of daylight per day in April in Caernarfon14
16 hours of daylight per day in May in Caernarfon16
17 hours of daylight per day in June in Caernarfon17
16 hours of daylight per day in July in Caernarfon16
15 hours of daylight per day in August in Caernarfon15
13 hours of daylight per day in September in Caernarfon13
11 hours of daylight per day in October in Caernarfon11
9 hours of daylight per day in November in Caernarfon9
8 hours of daylight per day in December in Caernarfon8
UV Index (Maximum)
No UV (maximum) index in January in Caernarfon0
UV (maximum) index 1 (Low) in February in Caernarfon1
UV (maximum) index 2 (Low) in March in Caernarfon2
UV (maximum) index 4 (Moderate) in April in Caernarfon4
UV (maximum) index 5 (Moderate) in May in Caernarfon5
UV (maximum) index 6 (High) in June in Caernarfon6
UV (maximum) index 6 (High) in July in Caernarfon6
UV (maximum) index 5 (Moderate) in August in Caernarfon5
UV (maximum) index 4 (Moderate) in September in Caernarfon4
UV (maximum) index 2 (Low) in October in Caernarfon2
UV (maximum) index 1 (Low) in November in Caernarfon1
No UV (maximum) index in December in Caernarfon0

Rainfall in Caernarfon

  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 Caernarfon20
16 days with some rainfall in February in Caernarfon16
18 days with some rainfall in March in Caernarfon18
14 days with some rainfall in April in Caernarfon14
15 days with some rainfall in May in Caernarfon15
14 days with some rainfall in June in Caernarfon14
14 days with some rainfall in July in Caernarfon14
15 days with some rainfall in August in Caernarfon15
16 days with some rainfall in September in Caernarfon16
19 days with some rainfall in October in Caernarfon19
20 days with some rainfall in November in Caernarfon20
20 days with some rainfall in December in Caernarfon20
Average monthly rainfall (mm)
164 mm monthly rainfall in January in Caernarfon164
111 mm monthly rainfall in February in Caernarfon111
128 mm monthly rainfall in March in Caernarfon128
92 mm monthly rainfall in April in Caernarfon92
90 mm monthly rainfall in May in Caernarfon90
94 mm monthly rainfall in June in Caernarfon94
99 mm monthly rainfall in July in Caernarfon99
131 mm monthly rainfall in August in Caernarfon131
141 mm monthly rainfall in September in Caernarfon141
174 mm monthly rainfall in October in Caernarfon174
183 mm monthly rainfall in November in Caernarfon183
183 mm monthly rainfall in December in Caernarfon183

More about Caernarfon

Caernarfon by month

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

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The climate guide for Wales (Caernarfon) 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 Caernarfon?

Caernarfon 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: Caernarfon 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 Caernarfon with the USA

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

Maximum daytime temperature (°C)

Caernarfon, Gwynedd, Wales
USA (Washington)
7
5
7
7
8
13
11
19
14
24
17
29
18
31
18
30
16
26
14
20
10
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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