The city is located in north-western France, in the eastern part of Brittany, of which it is the capital.
is a bit milder than in the rest of northern France, however, it is not as influenced by the ocean than the coasts of Brittany. Anyway, the sky is often cloudy, the humidity is high and there are periods when the wind blows moderate or strong. Rainfall is frequent.
Cold waves are shorter and less intense than in Paris and in the interior of France, but are a little more intense than on the coasts of Brittany (see Saint-Malo, Brest). However, there may occasionally be cold periods, in which the temperature drops below freezing, and it can even snow. The temperature dropped to -14.5 °C (6 °F) in January 1985.
, temperatures are mild or pleasantly warm. It can also rain, but less often than in winter.
Hot days are rare, but the city is a little more exposed to heat waves than the coasts of Brittany, even though up here they usually last a few days, sometimes just a day or two. The highest record is 40.5 °C (104.9 °F), set in July 2022. The previous record was 40 °C (104 °F) and was set in July 2019. In August 2003, when there were seven days with more than 35 °C (95 °F), and in the summer of 2022 eight days, from June to August.
to visit Rennes runs from mid-May to mid-September, since it is the warmest and sunniest period of the year. Sometimes, it can be hot in July and August, while in other circumstances, nights can be cool or even a little cold even in these months, so it can be useful to bring a sweatshirt or sweater and a light jacket for the evening.
. Here are the average temperatures.
January, the coldest month of the year, is generally a quite cold month. The average temperature is of
6.2 °C, with a minimum of
3.3 °C and a maximum of
9.2 °C.
On the coldest nights of the month, the temperature usually drops to around
-4.5 °C. However, it dropped to
-11.3 °C in January 1997.
On the warmest days of the month, the temperature usually reaches around
14.5 °C. However, it reached
16.8 °C in January 2003.
Precipitation amounts to
70 mm, distributed over 11 days.
The day lasts on average 8 hours and 50 minutes.
There are on average 2 hours of sunshine per day. So, the sun shines 25% of the time.
The average humidity is 87%. Hence, the air is normally humid.
The average wind speed is of
14.2 kph.
February is generally a quite mild month. The average temperature is of
6.6 °C, with a minimum of
3 °C and a maximum of
10.2 °C.
On the coldest nights of the month, the temperature usually drops to around
-3.5 °C. However, it dropped to
-10.8 °C in February 1991.
On the warmest days of the month, the temperature usually reaches around
15.5 °C. However, it reached
20.9 °C in February 2019.
Precipitation amounts to
50 mm, distributed over 9 days.
The day lasts on average 10 hours and 10 minutes.
There are on average 3 hours of sunshine per day. So, the sun shines 31% of the time.
The average humidity is 82%. Hence, the air is normally humid.
The average wind speed is of
14.2 kph.
March is generally a mild month. The average temperature is of
8.8 °C, with a minimum of
4.5 °C and a maximum of
13.2 °C.
On the coldest nights of the month, the temperature usually drops to around
-2 °C. However, it dropped to
-7.3 °C in March 2005.
On the warmest days of the month, the temperature usually reaches around
19.5 °C. However, it reached
23.4 °C in March 2017.
Precipitation amounts to
50 mm, distributed over 10 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 4 hours of sunshine per day. So, the sun shines 35% of the time.
The average humidity is 78%. Hence, the air is normally humid.
The average wind speed is of
14 kph.
April is generally a mild month. The average temperature is of
11 °C, with a minimum of
6 °C and a maximum of
16 °C.
On the coldest nights of the month, the temperature usually drops to around
0 °C. However, it dropped to
-2.8 °C in April 1996.
On the warmest days of the month, the temperature usually reaches around
23 °C. However, it reached
27.7 °C in April 2018.
Precipitation amounts to
50 mm, distributed over 10 days.
The day lasts on average 13 hours and 50 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 39% of the time.
The average humidity is 74%. Hence, the air is normally humid.
The average wind speed is of
13.5 kph.
May is generally a mild month. The average temperature is of
14.4 °C, with a minimum of
9.3 °C and a maximum of
19.4 °C.
On the coldest nights of the month, the temperature usually drops to around
3.5 °C. However, it dropped to
-1.1 °C in May 2019.
On the warmest days of the month, the temperature usually reaches around
27 °C. However, it reached
30.3 °C in May 1992.
Precipitation amounts to
65 mm, distributed over 10 days.
The day lasts on average 15 hours and 20 minutes. So the days are long.
There are on average 6 hours of sunshine per day. So, the sun shines 40% of the time.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is of
13 kph.
June is generally a very mild month. The average temperature is of
17.4 °C, with a minimum of
12.1 °C and a maximum of
22.6 °C.
On the coldest nights of the month, the temperature usually drops to around
6.5 °C. However, it dropped to
3.5 °C in June 2006.
On the warmest days of the month, the temperature usually reaches around
31 °C. However, it reached
35.7 °C in June 2019.
Precipitation amounts to
45 mm, distributed over 7 days.
The day lasts on average 16 hours and 5 minutes. So the days are long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
There are on average 7 hours of sunshine per day. So, the sun shines 45% of the time.
The average humidity is 72%. Hence, the air is normally humid.
The average wind speed is of
12.6 kph.
July, the warmest month of the year, is generally a warm month. The average temperature is of
19.3 °C, with a minimum of
13.8 °C and a maximum of
24.8 °C.
On the coldest nights of the month, the temperature usually drops to around
9 °C. However, it dropped to
6.8 °C in July 2004.
On the warmest days of the month, the temperature usually reaches around
32.5 °C. However, it reached
40.1 °C in July 2019.
Precipitation amounts to
50 mm, distributed over 7 days.
The day lasts on average 15 hours and 35 minutes. So the days are long.
There are on average 7 hours of sunshine per day. So, the sun shines 44% of the time.
The average humidity is 71%. Hence, the air is normally humid.
The average wind speed is of
12.4 kph.
August, the warmest month of the year, is generally a warm month. The average temperature is of
19.3 °C, with a minimum of
13.8 °C and a maximum of
24.8 °C.
On the coldest nights of the month, the temperature usually drops to around
8.5 °C. However, it dropped to
6.7 °C in August 1998.
On the warmest days of the month, the temperature usually reaches around
32.5 °C. However, it reached
39.5 °C in August 2003.
Precipitation amounts to
40 mm, distributed over 6 days.
The day lasts on average 14 hours and 10 minutes. So the days are long.
There are on average 6.5 hours of sunshine per day. So, the sun shines 47% of the time.
The average humidity is 72%. Hence, the air is normally humid.
The average wind speed is of
11.6 kph.
September is generally a very mild month. The average temperature is of
16.6 °C, with a minimum of
11.4 °C and a maximum of
21.9 °C.
On the coldest nights of the month, the temperature usually drops to around
6 °C. However, it dropped to
2.5 °C in September 2018.
On the warmest days of the month, the temperature usually reaches around
28.5 °C. However, it reached
34.2 °C in September 2020.
Precipitation amounts to
60 mm, distributed over 8 days.
The day lasts on average 12 hours and 30 minutes.
There are on average 6 hours of sunshine per day. So, the sun shines 47% of the time.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is of
11.6 kph.
October is generally a mild month. The average temperature is of
13.2 °C, with a minimum of
9.3 °C and a maximum of
17.2 °C.
On the coldest nights of the month, the temperature usually drops to around
2 °C. However, it dropped to
-4 °C in October 1997.
On the warmest days of the month, the temperature usually reaches around
22.5 °C. However, it reached
30 °C in October 2011.
Precipitation amounts to
75 mm, distributed over 11 days.
The day lasts on average 10 hours and 40 minutes.
There are on average 4 hours of sunshine per day. So, the sun shines 36% of the time.
The average humidity is 83%. Hence, the air is normally humid.
The average wind speed is of
12.3 kph.
November is generally a mild month. The average temperature is of
9.2 °C, with a minimum of
5.9 °C and a maximum of
12.5 °C.
On the coldest nights of the month, the temperature usually drops to around
-1.5 °C. However, it dropped to
-6 °C in November 2010.
On the warmest days of the month, the temperature usually reaches around
17.5 °C. However, it reached
21.4 °C in November 2015.
Precipitation amounts to
70 mm, distributed over 12 days.
The day lasts on average 9 hours and 10 minutes.
There are on average 2.5 hours of sunshine per day. So, the sun shines 30% of the time.
The average humidity is 87%. Hence, the air is normally humid.
The average wind speed is of
12.5 kph.
December is generally a quite mild month. The average temperature is of
6.6 °C, with a minimum of
3.6 °C and a maximum of
9.6 °C.
On the coldest nights of the month, the temperature usually drops to around
-4 °C. However, it dropped to
-8.4 °C in December 2009.
On the warmest days of the month, the temperature usually reaches around
14.5 °C. However, it reached
17.8 °C in December 2015.
Precipitation amounts to
75 mm, distributed over 12 days.
The day lasts on average 8 hours and 25 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
There are on average 2 hours of sunshine per day. So, the sun shines 26% of the time.
The average humidity is 88%. Hence, the air is normally humid.
The average wind speed is of
13.6 kph.