Yellow thunderstorm warning
Information on update: Warning extending further NW and to cover all of Wales while removing from parts of the east of England. Matrix position changed to Low likelihood of Medium impacts. A broad band of thunderstorms and heavy rain will move north across England and Wales, perh…
Tomorrow in Cardiff looks
light rain shower, with a high of 72°
and an overnight low of 59°.
There is a 86% chance of rain - plan accordingly.
Winds top out near 13 mph,
and the UV index reaches 4 (moderate).
Cardiff has an oceanic climate. Average highs run from 46°F (8°C) in January to 69°F (20°C) in July, and the city records roughly 171 days of measurable precipitation a year.
Cardiff weather: quick facts
Hottest month: July - highs near 69°F (20°C)
Coldest month: January - highs near 46°F (8°C)
Decade extremes (2015-2024): 91°F (33°C) high · 22°F (-6°C) low
Wettest month: December (17 rainy days) · Sunniest: June (11.7 h sun/day)
Climate type:oceanic
Annual swing: 12°C between the average warmest and coolest month · day to night: 6°C
Snow: about 2 days a year
Average humidity: 82%
Temperatures through the year
Snowfall is rare but not unheard of. January sits at the other end of the year: 46°F (8°C) by day, 37°F (3°C) at night. Warmth peaks in July: highs of 69°F (20°C), lows of 56°F (13°C). The wettest month is December (5.6 inches (143 mm) across 17 days) and the driest June.
Rain, sun and snow
Days and nights are about 6°C apart on average - narrower than all but 10% of the 3496 cities in our dataset. Sunshine averages 7.7 hours a day over the year - duller than about 89% of the cities we track, peaking in June at 11.7 hours. Relative humidity averages 82% across the year, more humid than 92% of the 3496 cities in our dataset. The gridded 2015-2024 daily record for this location tops out at 91°F (33°C) and bottoms at 22°F (-6°C) - decade extremes, not all-time station records.
Season by season
Spring (March through May)
Through spring, Cardiff stays on the cool side of mild: 55°F (13°C) by day, 43°F (6°C) after dark, and rain falls on around 39 of the 90 days.
Summer (June through August)
Summer in Cardiff stays on the cool side of mild, with daytime highs averaging 67°F (20°C) and nights around 55°F (13°C); rain falls on around 42 of the 90 days. Daylight is generous - around 11.0 hours of sun a day.
Fall (September through November)
Fall in Cardiff is crisp but comfortable, with daytime highs averaging 58°F (14°C) and nights around 48°F (9°C); rain falls on around 44 of the 90 days.
Winter (December through February)
Through winter, Cardiff is brisk and cold: 47°F (9°C) by day, 38°F (4°C) after dark, and rain falls on around 46 of the 90 days.
Average temperatures in Cardiff by month
Monthly averages for Cardiff based on 2015–2024 weather data.
About 171 days bring measurable precipitation, totalling 47.8 inches (1215 mm). That works out at roughly 7.1 mm on an average wet day.
Which month is warmest in Cardiff?
July, averaging 69°F (20°C) by day and 56°F (13°C) overnight. The hottest single day in our 2015-2024 record for this location reached 91°F (33°C).
What is the rainiest month in Cardiff?
December, at 5.6 inches (143 mm) over about 17 days. June is the driest month, at 2.6 inches (66 mm).
Is Cardiff cold in winter?
January nights average 37°F (3°C). Chilly rather than harsh - hard freezes are uncommon.
What is the best time to visit Cardiff?
The best time to visit Cardiff is generally April to September, when warm days, manageable rainfall and plenty of daylight line up. Daytime temperatures in that window sit near 64°F (18°C), with rain on about 13 days a month. For the same question asked the other way round, see where else is warm in April.
How humid does Cardiff get?
Relative humidity averages 82% across the year, which reads as very humid. The most comfortable stretch falls in the drier half of the year.
What is the coldest month in Cardiff?
January, with highs of 46°F (8°C) and lows near 37°F (3°C). The coldest day in the 2015-2024 record fell to 22°F (-6°C).
Does it snow in Cardiff?
Yes - about 2 days a year carry measurable snowfall, concentrated March.