Annual mean 12°C · wettest around December · prevailing wind SW
Warmest
22.0 °C
Coldest
5.7 °C
Wettest
26%
Windiest
5.3 m/s
Prevailing
SW
4.4 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Welwyn Garden City over the whole year is 12°C. July is the hottest month, with highs of about 22°C; January is the coldest, with lows of about 4°C. Welwyn Garden City has no sharply defined rainy season: the chance of rain on a given day runs from 14% in April, the driest month, to 24% in December, the wettest. Winds in Welwyn Garden City are highest in February, averaging 4.3 m/s (15 km/h), and lightest in September, at 3.4 m/s (12 km/h). The prevailing wind is from the SW. The clearest skies in Welwyn Garden City come in July, when the sky is typically 45% covered; December is the cloudiest month, at 65%.
Month by month Welwyn Garden City climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
6°C
4°C
2°C
20%
59%
3.8 m/s
0
0
15
February
8°C
5°C
3°C
21%
57%
4.3 m/s
1
0
25
March
10°C
5°C
5°C
20%
58%
4.0 m/s
2
0
38
April
13°C
7°C
9°C
14%
45%
3.6 m/s
12
0
59
May
16°C
11°C
13°C
17%
46%
3.5 m/s
37
1
78
June
20°C
14°C
17°C
15%
46%
3.5 m/s
64
11
74
July
22°C
16°C
19°C
16%
45%
3.5 m/s
76
15
70
August
21°C
15°C
19°C
15%
45%
3.5 m/s
75
11
73
September
19°C
13°C
16°C
18%
47%
3.4 m/s
60
5
79
October
15°C
10°C
11°C
21%
53%
3.5 m/s
22
0
78
November
10°C
7°C
6°C
20%
58%
3.6 m/s
1
0
45
December
8°C
6°C
4°C
24%
65%
3.9 m/s
0
0
26
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Welwyn Garden City weather by season
Year round, Welwyn Garden City has days of about 6°C at their warmest in January, its coolest month, and 22°C in July, its warmest; the coolest hours of the day run from 4°C to 16°C through the year, and the average temperature over the year is 12°C around the clock. Rain is most likely around December and least likely around April. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Welwyn Garden City weather in winterDecember to February
High 7°CLow 5°CRain 22%
Winter in Welwyn Garden City has typical daily highs of about 7°C and lows of about 5°C, with a 22% chance of rain on a given day.
Welwyn Garden City weather in springMarch to May
High 13°CLow 7°CRain 17%
Spring in Welwyn Garden City has typical daily highs of about 13°C and lows of about 7°C, with a 17% chance of rain on a given day.
Welwyn Garden City weather in summerJune to August
High 21°CLow 15°CRain 16%
Summer in Welwyn Garden City has typical daily highs of about 21°C and lows of about 15°C, with a 16% chance of rain on a given day.
Welwyn Garden City weather in autumnSeptember to November
High 14°CLow 10°CRain 20%
Autumn in Welwyn Garden City has typical daily highs of about 14°C and lows of about 10°C, with a 20% chance of rain on a given day.
When is the rainy season in Welwyn Garden City?
Welwyn Garden City has no sharply defined rainy season: the chance of rain on a given day runs from 14% in April, the driest month, to 24% in December, the wettest.
What time of year is Welwyn Garden City windiest?
Winds in Welwyn Garden City are highest in February, averaging 4.3 m/s (15 km/h), and lightest in September, at 3.4 m/s (12 km/h). The prevailing wind is from the SW.
What is the average temperature in Welwyn Garden City year round?
The average temperature in Welwyn Garden City over the whole year is 12°C. July is the hottest month, with highs of about 22°C; January is the coldest, with lows of about 4°C.