Cardiff, Wales Weather by Month and Climate Averages

How much rain does Cardiff get?

Cardiff gets 724 mm of precipitation in an average year, spread over about 188 days with measurable rain. That is fewer rainy days than 59% of the UK.

November is the wettest month, with 81 mm. May is the driest, with 47 mm. November has the most rainy days, about 19.

The longest dry spell in the last five years lasted 32 days, to June 15, 2023.

Cardiff weather by month

Cardiff weather in January

In January, Cardiff averages a high of 9°C and a low of 2°C. It gets 70 mm of precipitation over about 19 rainy days. The sun is out about 30% of daylight hours. The January record high is 16°C (2015) and the record low is -16°C (2010).

Cardiff weather in February

In February, Cardiff averages a high of 9°C and a low of 2°C. It gets 52 mm of precipitation over about 16 rainy days. The sun is out about 24% of daylight hours. The February record high is 18°C (2019) and the record low is -13°C (1991).

Cardiff weather in March

In March, Cardiff averages a high of 12°C and a low of 3°C. It gets 49 mm of precipitation over about 16 rainy days. The sun is out about 30% of daylight hours. The March record high is 21°C (2021) and the record low is -8°C (1986).

Cardiff weather in April

In April, Cardiff averages a high of 14°C and a low of 4°C. It gets 52 mm of precipitation over about 14 rainy days. The sun is out about 37% of daylight hours. The April record high is 27°C (2025) and the record low is -7°C (1970).

Cardiff weather in May

In May, Cardiff averages a high of 17°C and a low of 7°C. It gets 47 mm of precipitation over about 13 rainy days. The sun is out about 36% of daylight hours. The May record high is 33°C (2026) and the record low is -4°C (1979). May is one of the most comfortable months to visit.

Cardiff weather in June

In June, Cardiff averages a high of 20°C and a low of 11°C. It gets 55 mm of precipitation over about 12 rainy days. The sun is out about 37% of daylight hours. The June record high is 37°C (2026) and the record low is 0°C (1991). June is one of the most comfortable months to visit.

Cardiff weather in July

In July, Cardiff averages a high of 22°C and a low of 12°C. It gets 50 mm of precipitation over about 14 rainy days. The sun is out about 35% of daylight hours. The July record high is 35°C (2022) and the record low is 4°C (2011). July is one of the most comfortable months to visit.

Cardiff weather in August

In August, Cardiff averages a high of 22°C and a low of 12°C. It gets 62 mm of precipitation over about 15 rainy days. The sun is out about 33% of daylight hours. The August record high is 35°C (1990) and the record low is 3°C (2010). August is one of the most comfortable months to visit.

Cardiff weather in September

In September, Cardiff averages a high of 19°C and a low of 10°C. It gets 53 mm of precipitation over about 14 rainy days. The sun is out about 31% of daylight hours. The September record high is 30°C (2023) and the record low is 0°C (1975). September is one of the most comfortable months to visit.

Cardiff weather in October

In October, Cardiff averages a high of 15°C and a low of 7°C. It gets 78 mm of precipitation over about 18 rainy days. The sun is out about 23% of daylight hours. The October record high is 26°C (2011) and the record low is -5°C (2003).

Cardiff weather in November

In November, Cardiff averages a high of 12°C and a low of 4°C. It gets 81 mm of precipitation over about 19 rainy days. The sun is out about 26% of daylight hours. The November record high is 18°C (2010) and the record low is -8°C (1993).

Cardiff weather in December

In December, Cardiff averages a high of 9°C and a low of 2°C. It gets 76 mm of precipitation over about 19 rainy days. The sun is out about 22% of daylight hours. The December record high is 16°C (1985) and the record low is -14°C (2010).

Sunshine, humidity and wind in Cardiff

April is the sunniest month in Cardiff, with sunshine about 37% of daylight hours. December is the cloudiest, at 22%. Over the year the sun shines about 30% of daylight hours. Cardiff is sunnier than 59% of the UK.

Humidity peaks in December at 88% and is lowest in April at 74%.

Cardiff has about 3 days a year above 32°C.

First and last freeze in Cardiff

The first fall freeze in Cardiff typically comes around October 23, and the last spring freeze around April 28. That leaves a frost-free growing season of about 178 days.

Cardiff weather records

The hottest temperature on record at the Cardiff station is 37°C, on June 24, 2026. The coldest is -16°C, on January 14, 1982.

The wettest day on record brought 64 mm of rain, on July 6, 1989.

48 all-time records have been set at the station since 1970.

The annual mean temperature has changed by +0.3°C per decade since 1970.

The best time to visit Cardiff

The most comfortable time to visit is typically May to September, when daytime highs sit near 20°C.

Winter (December–February) is chilly, with average highs around 9°C and lows near 2°C.

Spring (March–May) is mild, with average highs around 14°C and lows near 5°C.

Summer (June–August) is warm, with average highs around 21°C and lows near 12°C. It can feel humid.

Autumn (September–November) is mild, with average highs around 15°C and lows near 7°C.

Cardiff climate questions

How much rain does Cardiff get?

Cardiff gets 724 mm of precipitation in an average year, over about 188 rainy days.

What is the wettest month in Cardiff?

November is the wettest month in Cardiff, with 81 mm. May is the driest, with 47 mm.

How many rainy days does Cardiff have a year?

Cardiff has about 188 days with measurable rain in an average year. November has the most, about 19.

What is the hottest month in Cardiff?

July is the warmest month in Cardiff, with an average high of 22°C.

What is the coldest month in Cardiff?

January is the coldest month in Cardiff, with an average low of 2°C.

What is the record high temperature in Cardiff?

The record high at the Cardiff station is 37°C, set on June 24, 2026. The record low is -16°C, on January 14, 1982.

What is the sunniest month in Cardiff?

April is the sunniest month in Cardiff, with sunshine about 37% of daylight hours. December is the cloudiest.

When is the first frost in Cardiff?

The first fall freeze in Cardiff typically comes around October 23. The last spring freeze is around April 28.

What is the best time to visit Cardiff?

The most comfortable time to visit is typically May to September, when daytime highs sit near 20°C.