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Current
Hourly
7 Days
14 Days
Weekend
Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Harpenden, UKH
Content continues below
May
Average Temperature
High
16°
Feels 15
Low
7°
Feels 5
Average Precipitation
12 Days
Rain amount
53.9mm
Snow amount
0cm
Content continues below
Daily Historical Averages
May 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
14°
19
16°
20
18°
21
21°
22
24°
23
25°
24
24°
25
23°
26
22°
27
21°
28
20°
29
19°
30
18°
31
18°
Forecast
Monday, May 18, 2026
Day
14°
Feels 12
Wind
21 km/h SW
Gust
31 km/h
Humidity
65%
P.O.P
90%
Rain
2-4 mm
Night
8°
Feels 5
Wind
21 km/h S
Gust
31 km/h
Humidity
97%
P.O.P
90%
Rain
~5 mm
Historical Averages
May 18
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.