Weather in Cardiff Today
Current temperature in Cardiff: 17°C (63°F). Mainly Clear. Today's high 20°C (68°F), low 15°C (59°F).
Today's Daylight Forecast
Moon & Islamic Calendar
Air quality and UV are both favourable great conditions for a walk, run, or outdoor activity.
5-Day Weather Forecast
Full 15-Day ForecastAtmospheric Details
Today vs Normal
The long-term average high for today is 18°C.
23 of the last 28 days with published data ran above normal.
It continues that pattern - today's forecast is also running above normal.
Red = above normal, blue = at or below · last 12 days
Air Quality
Air quality is considered satisfactory, and air pollution poses little or no risk. It’s a good day to be active outside.
Health & Activity Advice
UV index is 3 today — low. Minimal sun protection is needed for most outdoor activity.
Air quality is considered satisfactory, and air pollution poses little or no risk. It’s a good day to be active outside.
Conditions are comfortable for outdoor activity at most points during the day today.
Nearby Regional Outlook
Cardiff Weather Radar
Live precipitation · Cloud cover · Wind
Frequently Asked Questions
What is the hottest month in Cardiff?
The hottest month in Cardiff is typically July, with daytime highs averaging around 20.8°C (69°F), based on 10 years of historical weather data. Overnight lows during this period average near 13.5°C (56°F).
What is the coldest month in Cardiff?
The coldest month in Cardiff is typically January, with overnight lows averaging around 2.5°C (37°F) and daytime highs near 7.8°C (46°F), based on 10 years of historical weather data.
Does Cardiff have a rainy season?
Cardiff doesn't have a sharply defined rainy season rainfall is fairly spread across the year based on 10 years of historical data. December is the wettest month on average (about 149 mm), while June is the driest (about 71 mm).
What's the best time of year to visit Cardiff?
The best time to visit Cardiff is typically June to August, when daytime highs average a comfortable 20.1°C (68°F). Rainfall during this window averages around 82 mm, one of the lighter, more comfortable stretches of the year. This is based on 10 years of historical weather data.
Is Cardiff's air quality safe right now?
As of the latest reading, Cardiff's air quality index (AQI) is 25, rated "Good", based on the nearest monitoring station. Air quality is considered satisfactory, with little to no health risk.