Annual mean 11°C · wettest around December · prevailing wind W
Warmest
24.4 °C
Coldest
1.7 °C
Wettest
37%
Windiest
3.5 m/s
Prevailing
W
2.8 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
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 Grenchen over the whole year is 11°C. July is the hottest month, with highs of about 24°C; January is the coldest, with lows of about 0°C. Grenchen has no sharply defined rainy season: the chance of rain on a given day runs from 21% in September, the driest month, to 33% in December, the wettest. Winds in Grenchen are highest in January, averaging 2.5 m/s (9 km/h), and lightest in September, at 1.7 m/s (6 km/h). The prevailing wind is from the W. The clearest skies in Grenchen come in August, when the sky is typically 56% covered; December is the cloudiest month, at 78%.
Month by month Grenchen 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
3°C
0°C
-1°C
30%
77%
2.5 m/s
0
0
9
February
6°C
2°C
2°C
25%
69%
2.5 m/s
0
0
24
March
9°C
3°C
5°C
27%
65%
2.5 m/s
5
0
41
April
13°C
6°C
10°C
24%
63%
2.3 m/s
26
0
64
May
17°C
11°C
14°C
30%
67%
2.2 m/s
48
4
73
June
22°C
15°C
21°C
27%
59%
2.1 m/s
71
27
55
July
24°C
17°C
23°C
23%
57%
2.0 m/s
74
36
46
August
24°C
16°C
23°C
21%
56%
1.8 m/s
65
41
43
September
19°C
12°C
18°C
21%
59%
1.7 m/s
66
16
68
October
14°C
8°C
12°C
23%
65%
1.8 m/s
35
1
76
November
7°C
4°C
4°C
29%
76%
2.0 m/s
2
0
31
December
4°C
1°C
0°C
33%
78%
2.3 m/s
0
0
10
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 Grenchen weather by season
Year round, Grenchen has days of about 3°C at their warmest in January, its coolest month, and 24°C in July, its warmest; the coolest hours of the day run from 0°C to 17°C through the year, and the average temperature over the year is 11°C around the clock. Rain is most likely around December and least likely around September. 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.
Grenchen weather in winterDecember to February
High 4°CLow 1°CRain 29%
Winter in Grenchen has typical daily highs of about 4°C and lows of about 1°C, with a 29% chance of rain on a given day.
Grenchen weather in springMarch to May
High 13°CLow 6°CRain 27%
Spring in Grenchen has typical daily highs of about 13°C and lows of about 6°C, with a 27% chance of rain on a given day.
Grenchen weather in summerJune to August
High 23°CLow 16°CRain 23%
Summer in Grenchen has typical daily highs of about 23°C and lows of about 16°C, with a 23% chance of rain on a given day.
Grenchen weather in autumnSeptember to November
High 14°CLow 8°CRain 24%
Autumn in Grenchen has typical daily highs of about 14°C and lows of about 8°C, with a 24% chance of rain on a given day.
When is the rainy season in Grenchen?
Grenchen has no sharply defined rainy season: the chance of rain on a given day runs from 21% in September, the driest month, to 33% in December, the wettest.
What time of year is Grenchen windiest?
Winds in Grenchen are highest in January, averaging 2.5 m/s (9 km/h), and lightest in September, at 1.7 m/s (6 km/h). The prevailing wind is from the W.
What is the average temperature in Grenchen year round?
The average temperature in Grenchen over the whole year is 11°C. July is the hottest month, with highs of about 24°C; January is the coldest, with lows of about 0°C.