Which is the hottest month in Caernarfon?

The hottest time of year in Caernarfon is normally July. Expect maximum daytime temperatures to reach 18°C.

Which month has the most rain in Caernarfon?

In terms of rainfall, December is usually the wettest month in Caernarfon with 183mm on average. There are normally 20 days in December with some rain.

When is it sunniest in Caernarfon?

The sunniest time of year in Caernarfon is normally May with bright sunshine on average for 40% of daylight hours; that's 6 hours of sunshine per day.

When is the sea warmest in Caernarfon?

The sea is usually at its warmest in Caernarfon in August when the water temperature reaches 16°C.

Best time to visit Caernarfon

Q: When is the best time to visit Caernarfon?

The best time to visit Caernarfon is July and August based on the following average weather conditions. Maximum daytime temperature = 22 - 30°C.

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Caernarfon by month

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

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When is the best time to visit Caernarfon?

The best time to visit Caernarfon is July and August based on the following average weather conditions.

Maximum daytime temperature = 72 - 86°F [remove]

Change the criteria to reflect your weather preferences.

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Max Day Temperature (°F)

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Jan
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46
Mar
52
Apr
57
May
63
Jun
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Jul
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Aug
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Sep
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Best time to visit

Destination

Daytime temperature

Sunshine hours

Sea temperature

Monthly rainfall

Days with some rain

Heat & humidity

The weather guide for Wales (Caernarfon) shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by meteoblue. Find out more about our data sources.

Metric (°C) | Imperial (°F)