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The best time to visit Cardiff

Month-by-month climate averages for Cardiff, Wales, so you can pick your dates on data rather than guesswork.

Short answer

The most comfortable time to visit Cardiff is usually May, June, July and August, when daytime highs sit in the pleasant 16-26°C range and the heaviest October rain is behind you.

Cardiff is warmest in June (highs near 20°C) and coldest in January (lows around 2°C), with roughly 1510 mm of precipitation across the year and October the wettest month. The sweet spot for most visitors is May, June, July and August.

These are long-run averages. For the actual days you are travelling, check the live Cardiff forecast — and note how much the models agree, because that tells you how much to trust it.

Cardiff weather by month

what to expect in Cardiff through the year

Here is Cardiff's typical weather in each month: the average daytime high and overnight low in °C, how each month feels, and the wettest month marked. Use it to plan any trip to Cardiff by season.

Jan
8°
2°
Cool
Feb
10°
4°
Cool
Mar
10°
5°
Cool
Apr
12°
6°
Cool
May
17°
9°
Mild
Jun
20°
11°
Mild
Jul
19°
12°
Mild
Aug
20°
13°
Mild
Sep
19°
12°
Mild
Oct
15°
9°
Mild
Wettest
Nov
11°
5°
Cool
Dec
10°
6°
Cool

Common questions

When is the best time to visit Cardiff?
The most comfortable time to visit Cardiff is usually May, June, July and August, when daytime highs sit in the pleasant 16-26°C range and the heaviest October rain is behind you.
What is the warmest month in Cardiff?
June is the warmest month in Cardiff, averaging highs near 20°C.
What is the coldest month in Cardiff?
January is the coldest month in Cardiff, with lows around 2°C.
When is the rainy season in Cardiff?
The wettest month in Cardiff is usually October, out of roughly 1510 mm of precipitation across the year.

Cardiff month by month

JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember