Measurements:
°C
°F
CURRENT WEATHER
05:15
Rennes
62°F
NW 8 mph
Feels like: 62°F
Precip: 39%
World Resorts France Rennes Weather

7 Day Weather Forecast

09.29
tue
DAY
70°F
N 10 mph
precip
24%
NIGHT
68°F
NW 7 mph
precip
21%
09.30
wed
DAY
66°F
NE 7 mph
precip
16%
NIGHT
62°F
N 9 mph
precip
11%
10.01
thu
DAY
64°F
E 6 mph
precip
5%
NIGHT
58°F
S 1 mph
precip
19%
10.02
fri
DAY
64°F
W 5 mph
precip
13%
NIGHT
56°F
S 8 mph
precip
12%
10.03
sat
DAY
68°F
SW 6 mph
precip
2%
NIGHT
56°F
S 7 mph
precip
12%
10.04
sun
DAY
66°F
SE 6 mph
precip
8%
NIGHT
52°F
SE 6 mph
precip
23%
10.05
mon
DAY
60°F
SW 9 mph
precip
17%
NIGHT
56°F
S 14 mph
precip
16%

Rennes Sea Water Temperature in September, °F

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Rennes was 19.6°F. The maximum and minimum values were 18.9°F and 20.3°F respectively.

Rennes on the Weather Map

Best Time to Visit Rennes
The most sunny months:
July 13 days
August 12 days
April 10 days
The most warm months:
July 77.3 °F
August 77.2 °F
June 72.5 °F
Warmest sea temperature:
August 67.8 °F
September 66.6 °F
July 65.9 °F
The most cold months:
January 45.8 °F
February 48.0 °F
December 48.5 °F
The most rainy months:
June 5 days
November 3 days
April 3 days
The most windy months:
February 11 mph
December 11 mph
January 10 mph
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