18.12
thu
thu
Day
55°F
N 23 mph
Precip.
0%
0%
Night
54°F
E 13 mph
Precip.
82%
82%
19.12
fri
fri
Day
50°F
E 6 mph
Precip.
0%
0%
Night
41°F
N 6 mph
Precip.
0%
0%
20.12
sat
sat
Day
45°F
NW 9 mph
Precip.
0%
0%
Night
45°F
NW 10 mph
Precip.
0%
0%
21.12
sun
sun
Day
48°F
N 14 mph
Precip.
100%
100%
Night
39°F
NW 7 mph
Precip.
0%
0%
22.12
mon
mon
Day
43°F
W 9 mph
Precip.
0%
0%
Night
43°F
SE 5 mph
Precip.
0%
0%
23.12
tue
tue
Day
46°F
NE 5 mph
Precip.
0%
0%
Night
39°F
NW 2 mph
Precip.
0%
0%
24.12
wed
wed
Day
45°F
S 7 mph
Precip.
55%
55%
Night
37°F
S 7 mph
Precip.
0%
0%
25.12
thu
thu
Day
41°F
SW 9 mph
Precip.
100%
100%
Night
39°F
SW 11 mph
Precip.
0%
0%
26.12
fri
fri
Day
41°F
SW 10 mph
Precip.
0%
0%
Night
41°F
SW 8 mph
Precip.
0%
0%
27.12
sat
sat
Day
43°F
SW 7 mph
Precip.
0%
0%
Night
43°F
SW 6 mph
Precip.
0%
0%
28.12
sun
sun
Day
45°F
SW 9 mph
Precip.
0%
0%
Night
43°F
SW 6 mph
Precip.
0%
0%
29.12
mon
mon
Day
43°F
SW 6 mph
Precip.
0%
0%
Night
41°F
SW 6 mph
Precip.
0%
0%
30.12
tue
tue
Day
41°F
SW 9 mph
Precip.
0%
0%
Night
39°F
SW 13 mph
Precip.
0%
0%
31.12
wed
wed
Day
36°F
SW 15 mph
Precip.
0%
0%
Night
30°F
SW 10 mph
Precip.
0%
0%
Sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 52.2°F. The highest and lowest sea temperatures during the month were 53.6°F and 51.3°F.
Sea water temperature in January, °F
Show year:
2025
2024
2023
The average sea water temperature in January of 2025 was 48.0°F. The highest and lowest sea temperatures during the month were 49.1°F and 46.9°F.
Air temperature in Rennes, °F
Precipitation total in Rennes, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Rennes
Rennes on a weather map
Places in France:
Name
°F
24 Hours Forecast
Rennes
Local time: 09:20
December 18, thursday
1200
55°F
N
23 mph
23 mph
1500
55°F
N
25 mph
25 mph
1800
54°F
N
17 mph
17 mph
2100
54°F
N
17 mph
17 mph
December 19, friday
0000
54°F
E
13 mph
13 mph
0300
50°F
NE
7 mph
7 mph
0600
48°F
E
6 mph
6 mph
0900
46°F
SE
6 mph
6 mph
