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Harpenden - Weather warnings issued

14-day forecast

Forecast - Harpenden

Partly cloudy and light windsSunny and a gentle breezeSunny intervals and a gentle breezeDrizzle and a gentle breezeSunny intervals and a gentle breezeSunny intervals and a gentle breezeSunny intervals and a gentle breezeSunny intervals and a gentle breezeLight cloud and a gentle breezeLight cloud and a gentle breezeSunny intervals and a gentle breezeLight cloud and a gentle breezeLight cloud and a gentle breezeLight rain showers and a gentle breeze

Environmental Summary

Sunrise Sunset

Sunrise05:03Sunset21:11
PollenLowUVLowPollutionModerate

Sunrise Sunset

Sunrise05:05Sunset21:10
PollenLowUVModeratePollutionModerate

Sunrise Sunset

Sunrise05:06Sunset21:09
PollenLowUVModeratePollutionModerate

Sunrise Sunset

Sunrise05:07Sunset21:07
UVModeratePollutionModerate

Sunrise Sunset

Sunrise05:09Sunset21:06
UVHigh

Sunrise Sunset

Sunrise05:10Sunset21:05
UVHigh

Sunrise Sunset

Sunrise05:12Sunset21:04
UVHigh

Sunrise Sunset

Sunrise05:13Sunset21:02
UVModerate

Sunrise Sunset

Sunrise05:14Sunset21:01
UVModerate

Sunrise Sunset

Sunrise05:16Sunset20:59
UVModerate

Sunrise Sunset

Sunrise05:17Sunset20:58
UVModerate

Sunrise Sunset

Sunrise05:19Sunset20:56
UVModerate

Sunrise Sunset

Sunrise05:20Sunset20:55
UVModerate

Sunrise Sunset

Sunrise05:22Sunset20:53
UVModerate

Hour by hour forecast

Last updated
Last updated

Environmental Summary

Sunrise Sunset

Sunrise05:03Sunset21:11
PollenLowUVLowPollutionModerate

Sunrise Sunset

Sunrise05:05Sunset21:10
PollenLowUVModeratePollutionModerate

Sunrise Sunset

Sunrise05:06Sunset21:09
PollenLowUVModeratePollutionModerate

Sunrise Sunset

Sunrise05:07Sunset21:07
UVModeratePollutionModerate

Sunrise Sunset

Sunrise05:09Sunset21:06
UVHigh

Sunrise Sunset

Sunrise05:10Sunset21:05
UVHigh

Sunrise Sunset

Sunrise05:12Sunset21:04
UVHigh

Sunrise Sunset

Sunrise05:13Sunset21:02
UVModerate

Sunrise Sunset

Sunrise05:14Sunset21:01
UVModerate

Sunrise Sunset

Sunrise05:16Sunset20:59
UVModerate

Sunrise Sunset

Sunrise05:17Sunset20:58
UVModerate

Sunrise Sunset

Sunrise05:19Sunset20:56
UVModerate

Sunrise Sunset

Sunrise05:20Sunset20:55
UVModerate

Sunrise Sunset

Sunrise05:22Sunset20:53
UVModerate
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BBC London weather

Video forecast

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Updated Monday to Friday only

Text forecast

Today

Today

A fine and dry start with hazy sunshine and perhaps the odd mist patch that will quickly clear. Thereafter, a warm and dry day is expected with spells of warm sunshine. Light winds.

Tonight

Plenty of late evening sunshine, leading into a dry and partly cloudy night. The odd mist patch may form towards dawn. Winds remaining light.

Observations - Rothamsted

Observed at 03:00,

Thursday 19 July

13° C55° F
Wind speedNot availableNot availableWind Direction: Not available
  • Humidity: 83%
  • Visibility: Not available
  • Pressure: 1019mb, Falling
Observation Station: Rothamsted (Lat: 51.8167 Long: -0.3667)

Met Office warnings issued forHertfordshire

  1. Yellow warning of thunderstorms

    Updated 18 July at 10:34 BST
    Yellow warning of thunderstorms
    From
    14:00 BST on Fri 20 July
    To
    23:59 BST on Fri 20 July

    Most places will be dry but there is the potential for slow-moving thundery downpours in places.

    - There is a small chance that homes and businesses could be flooded quickly, with damage to some buildings from floodwater.

    - Where flooding or lightning strikes occur, there is a chance of delays and some cancellations to train, bus and tube services, particularly during the evening rush hour.

    - Spray and sudden flooding could lead to difficult driving conditions with the possibility of road closures

    - There is a slight chance that power cuts could occur and other services to some homes and businesses could be lost