Annual mean 12°C · wettest around December · prevailing wind W
Warmest
23.6 °C
Coldest
6.9 °C
Wettest
19%
Windiest
6.0 m/s
Prevailing
W
4.8 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 Rennes over the whole year is 12°C. July is the hottest month, with highs of about 23°C; January is the coldest, with lows of about 5°C. Rennes has no sharply defined rainy season: the chance of rain on a given day runs from 6% in July, the driest month, to 16% in December, the wettest. Winds in Rennes are highest in February, averaging 4.5 m/s (16 km/h), and lightest in June, at 3.4 m/s (12 km/h). The prevailing wind is from the W. The clearest skies in Rennes come in April, when the sky is typically 69% covered; December is the cloudiest month, at 84%.
Month by month Rennes 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
8°C
5°C
3°C
15%
84%
4.2 m/s
0
0
25
February
10°C
5°C
5°C
12%
79%
4.5 m/s
1
0
38
March
12°C
6°C
7°C
13%
76%
4.5 m/s
5
0
53
April
15°C
7°C
11°C
10%
69%
3.7 m/s
23
0
73
May
18°C
11°C
15°C
9%
73%
3.7 m/s
52
3
84
June
21°C
15°C
19°C
11%
77%
3.4 m/s
73
16
68
July
23°C
16°C
21°C
6%
74%
3.7 m/s
84
20
67
August
23°C
15°C
21°C
7%
73%
3.5 m/s
82
21
64
September
20°C
13°C
18°C
9%
74%
3.5 m/s
75
11
76
October
16°C
11°C
14°C
13%
79%
3.7 m/s
43
1
85
November
12°C
7°C
8°C
15%
80%
4.1 m/s
3
0
62
December
9°C
6°C
5°C
16%
84%
4.4 m/s
0
0
36
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 Rennes weather by season
Year round, Rennes has days of about 8°C at their warmest in January, its coolest month, and 23°C in July, its warmest; the coolest hours of the day run from 5°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 July. 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.
Rennes weather in winterDecember to February
High 9°CLow 5°CRain 14%
Winter in Rennes has typical daily highs of about 9°C and lows of about 5°C, with a 14% chance of rain on a given day.
Rennes weather in springMarch to May
High 15°CLow 8°CRain 11%
Spring in Rennes has typical daily highs of about 15°C and lows of about 8°C, with a 11% chance of rain on a given day.
Rennes weather in summerJune to August
High 22°CLow 15°CRain 8%
Summer in Rennes has typical daily highs of about 22°C and lows of about 15°C, with a 8% chance of rain on a given day.
Rennes weather in autumnSeptember to November
High 16°CLow 10°CRain 12%
Autumn in Rennes has typical daily highs of about 16°C and lows of about 10°C, with a 12% chance of rain on a given day.
When is the rainy season in Rennes?
Rennes has no sharply defined rainy season: the chance of rain on a given day runs from 6% in July, the driest month, to 16% in December, the wettest.
What time of year is Rennes windiest?
Winds in Rennes are highest in February, averaging 4.5 m/s (16 km/h), and lightest in June, at 3.4 m/s (12 km/h). The prevailing wind is from the W.
What is the average temperature in Rennes year round?
The average temperature in Rennes over the whole year is 12°C. July is the hottest month, with highs of about 23°C; January is the coldest, with lows of about 5°C.