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
06:46
Sunrise
19:04
Sunset
Moon
Waxing Crescent
13:21
Moonrise
20:40
Moonset
Daily Forecast
Today
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Air Quality Data Available
Upgrade to access real-time air quality data for Harpenden.
Resources
UV Index
Humidity
Weather in Harpenden today, September 16, 2026
Cloud cover dominates in Harpenden on September 16, 2026, keeping sunshine limited. Expect a grey, overcast feel rather than long bright spells.
Expect highs of 18°C and cooler readings close to 12°C. Expect humidity between 51% and 76%, most humid near 23:00. Winds stay light, near 4.4 km/h by 15:00, so the day feels still more than breezy.
Afternoon skies stay clogged, peaking close to 100% near 17:00. The grey theme continues rather than clearing out. Visibility holds near 39.4 km, though it can fall to 35.0 km. Sunrise is at 06:46 and sunset at 19:04, giving 12 hours 18 minutes of sunlight today.
In short, cloud leads the story in Harpenden on September 16, 2026; expect limited sun and a peak around 18°C.
Frequently asked questions about weather in Harpenden
How warm does it get in Harpenden?
The warmest month in Harpenden 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 Harpenden?
The coldest month in Harpenden 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 Harpenden?
The wettest month in Harpenden is October, with an average of 74mm of precipitation.
What is the driest time of year in Harpenden?
The driest month in Harpenden is April, with an average of 43mm of precipitation.
Explore more weather forecasts
- St Albans, England
- London, England
- Luton, England
- Birmingham, England
- Codicote, England
- Liverpool, England
- Hemel Hempstead, England
- Glasgow, Scotland
- Welwyn Garden City, England
- Manchester, England
- Hatfield, England
- Sheffield, England
- Abbots Langley, England
- Leeds, England
- Dunstable, England
- Edinburgh, Scotland
