Cardiff, United Kingdom Weather
Cardiff hourly forecast: next 24 hours
Today's high of 30°F (-1°C) is about 38°F (21°C) below the typical August high of 68°F (20°C).
Current conditions in detail
Cardiff weather tomorrow (Tuesday, August 18)
Tomorrow in Cardiff looks blowing snow, with a high of 30° and an overnight low of 28°. There is a 53% chance of rain - plan accordingly. Winds top out near 31 mph, and the UV index reaches 5 (moderate).
Cardiff 14-day forecast
About the weather in Cardiff
Weather in Cardiff is shaped by its oceanic climate - expect mild temperatures year-round with regular rainfall. July afternoons typically reach 69°F (20°C), while January highs hover near 46°F (8°C). Annual precipitation averages 47.8 inches (1215 mm) over about 171 rainy days.
Cardiff weather: quick facts
- Hottest month: July - highs near 69°F (20°C)
- Coldest month: January - highs near 46°F (8°C)
- Record high: 91°F (33°C) · Record low: 22°F (-6°C) (2015–2024)
- Wettest month: December (17 rainy days) · Sunniest: June (11.7 h sun/day)
- Climate type: oceanic - mild temperatures year-round with regular rainfall
- Snow: about 2 days a year
Temperatures through the year
The warmest stretch of the year centers on July. Highs average 69°F (20°C) and overnight lows stay near 56°F (13°C). The coolest month is January, with typical highs of 46°F (8°C) and lows around 37°F (3°C). Based on 2015–2024 weather data, temperatures have reached as high as 91°F (33°C) and dropped as low as 22°F (-6°C).
Rain, sun and snow
December is usually the wettest month. It brings about 5.6 inches (143 mm) of rain over 17 days, while June is the driest. June brings the most sunshine, averaging 11.7 hours of sun a day. Snowfall is rare but not unheard of.
Season by season
Spring (March through May)
Spring in Cardiff is mild, with daytime highs averaging 55°F (13°C) and nights around 43°F (6°C); expect showers on roughly 39 days across the season.
Summer (June through August)
Summer in Cardiff is crisp but comfortable, with daytime highs averaging 67°F (20°C) and nights around 55°F (13°C); expect showers on roughly 42 days across the season.
Fall (September through November)
Fall in Cardiff is mild, with daytime highs averaging 58°F (14°C) and nights around 48°F (9°C); expect showers on roughly 44 days across the season.
Winter (December through February)
Winter in Cardiff is brisk and cold, with daytime highs averaging 47°F (9°C) and nights around 38°F (4°C); expect showers on roughly 46 days across the season.
Average temperatures in Cardiff by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 46° | 37° | 15 | 4.0 in | 4.1 h/day | 87% |
| February | 48° | 38° | 14 | 4.2 in | 5.3 h/day | 84% |
| March | 50° | 39° | 16 | 4.2 in | 6.9 h/day | 81% |
| April | 55° | 41° | 11 | 2.6 in | 9.8 h/day | 76% |
| May | 61° | 47° | 12 | 3.3 in | 11.1 h/day | 77% |
| June | 66° | 53° | 12 | 2.6 in | 11.7 h/day | 76% |
| July | 69° | 56° | 15 | 3.4 in | 11.4 h/day | 77% |
| August | 68° | 56° | 15 | 4.0 in | 10.0 h/day | 80% |
| September | 64° | 53° | 13 | 4.1 in | 8.5 h/day | 82% |
| October | 58° | 48° | 16 | 5.4 in | 6.3 h/day | 84% |
| November | 51° | 43° | 15 | 4.4 in | 4.4 h/day | 87% |
| December | 49° | 41° | 17 | 5.6 in | 3.3 h/day | 89% |