See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:53
Sunrise
19:16
Sunset
Moon
Waxing Crescent
12:14
Moonrise
20:25
Moonset
Daily Forecast
Today
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Air Quality Data Available
Upgrade to access real-time air quality data for Chepstow.
Resources
UV Index
Humidity
Weather in Chepstow today, September 15, 2026
Expect a muted, overcast feel in Chepstow on September 15, 2026 as cloud persists. Brighter breaks, if they arrive, should stay brief. Cloud leads the morning, peaking close to 100% near 04:00. Sunshine has little room until later in the day.
Temperatures climb from an overnight low near 13°C toward a daytime high of about 19°C. The air stays humid, with relative humidity between 58% and 94% and the peak around 03:00. Expect gentle winds, highest near 14:00 at 6.4 km/h.
Expect persistent cloud later on, with amounts around 86% by 14:00. Sunshine remains the exception, not the rule. Visibility stays generally good near 30.2 km on average, though it can drop toward 3.5 km in thicker cloud or showers. Expect sunrise at 06:53, sunset at 19:16, and 12 hours 22 minutes of sunlight today overall.
Taken together, overcast skies in Chepstow on September 15, 2026 favour indoor or covered options, with temperatures near 19°C.
Frequently asked questions about weather in Chepstow
How warm does it get in Chepstow?
The warmest month in Chepstow is July, with average high temperatures of 22°C. The average temperature during this period is around 18°C.
How cold does it get in Chepstow?
The coldest month in Chepstow is January, with average low temperatures of 2°C. The average temperature during this period is around 5°C.
What is the wettest time of year in Chepstow?
The wettest month in Chepstow is October, with an average of 93mm of precipitation.
What is the driest time of year in Chepstow?
The driest month in Chepstow is April, with an average of 55mm of precipitation.
