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Hourly Forecast
Daylight Hours
06:57
Sunrise
19:15
Sunset
Moon
Waxing Crescent
13:31
Moonrise
20:53
Moonset
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Weather in Cardiff today, September 16, 2026
Cardiff starts September 16, 2026 looking damp, with rain in the forecast and wetter spells likely at times. Waterproof kit is the safer call for early plans. Expect a grey start, with morning cloud around 85% by 11:00. Outdoor plans early on should not rely on bright skies.
Expect highs of 18°C and cooler readings close to 12°C. Moisture in the air spans 59%-86%, with the highest values around 23:00. Expect gentle winds, highest near 17:00 at 4.8 km/h.
The second half of the day still looks unsettled, with rain probability around 22% by 23:00. Dense cloud near 100% at 15:00 keeps the feel grey. Horizontal visibility sits around 36.0 km, briefly nearer 26.1 km. Sunrise is at 06:57 and sunset at 19:15, giving 12 hours 18 minutes of sunlight today.
Taken together, Cardiff looks wet enough on September 16, 2026 that flexible outdoor plans work best, with temperatures peaking near 18°C.
Frequently asked questions about weather in Cardiff
How warm does it get in Cardiff?
The warmest month in Cardiff is July, with average high temperatures of 20°C. The average temperature during this period is around 17°C.
How cold does it get in Cardiff?
The coldest month in Cardiff is January, with average low temperatures of 3°C. The average temperature during this period is around 6°C.
What is the wettest time of year in Cardiff?
The wettest month in Cardiff is October, with an average of 124mm of precipitation.
What is the driest time of year in Cardiff?
The driest month in Cardiff is April, with an average of 63mm of precipitation.
