Hourly Weather Forecast - Harpenden, Hertfordshire, GB

12 AM
42°F
20%
9mph
S
Partly Cloudy
Humidity
91%
Feels like
36°F
Dew Point
39°F
1 AM
41°F
20%
9mph
SSE
Partly Cloudy
Humidity
92%
Feels like
36°F
Dew Point
39°F
2 AM
40°F
30%
8mph
SSE
30% Chance of Light Rain
Humidity
94%
Feels like
35°F
Dew Point
39°F
3 AM
40°F
30%
8mph
SSE
30% Chance of Light Rain
Humidity
96%
Feels like
34°F
Dew Point
38°F

Wind chill temperatures Monday A.M.

Cold Weather Chills the Nation Down to the Gulf

Extreme cold paired with their wind chill values will shiver much of the nation.

Snowfall forecast through Monday evening.

Mid-Atlantic, Great Lakes Snow Piles Up

Monday's Weather Outlook

Monday's Weather Outlook

How to Measure Snow via NWS

How To Measure Snow

Weekly Drought Map for December 11, 2025

Hit-or-Miss Precipitation Leads to Mixed Drought Results

A strong cold-air-damming event from March 20, 2018.

Cold Air Damming - Cause And Effects

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