| Month | Average (°C) | Record (°C) | Average (cm) | ||
|---|---|---|---|---|---|
| High ☀️ | Low 🌙 | High ☀️ | Low 🌙 | Precipitation 💧 | |
| January | 9.2 | 3.2 | 17.0 | -14.7 | 6.7 |
| February | 10.2 | 2.9 | 20.9 | -11.2 | 5.2 |
| March | 13.2 | 4.5 | 24.1 | -7.3 | 4.9 |
| April | 16.0 | 6.0 | 28.7 | -3.2 | 5.1 |
| May | 19.4 | 9.2 | 30.8 | -1.2 | 5.8 |
| June | 22.6 | 12.1 | 36.3 | 2.2 | 5.1 |
| July | 24.8 | 13.7 | 40.5 | 5.5 | 4.4 |
| August | 24.8 | 13.8 | 39.5 | 4.0 | 4.3 |
| September | 21.9 | 11.4 | 35.1 | 1.9 | 5.7 |
| October | 17.2 | 9.3 | 30.0 | -4.6 | 7.3 |
| November | 12.5 | 5.9 | 21.4 | -7.5 | 7.3 |
| December | 9.6 | 3.6 | 18.0 | -12.6 | 7.3 |
| Entire year | 16.8 | 8.0 | 40.5 | -14.7 | 69.1 |
|
More Rennes Weather Records
1944–2024
|
||
|---|---|---|
| Highest daily low | 24.3 °C | June 29, 1976 |
| Lowest daily high | -7.0 °C | January 19, 1963 |
| Greatest daily range (Difference of high and low) |
24.4 °C | July 23, 2019 |
| Greatest difference in daily high over two conscutive days |
15.0 °C | Aug 29–30, 2017 |
| Most daily precipitation | 7.0 cm | January 19, 1995 |
| Most monthly precipitation | 19.4 cm | October 1966 |
| Most yearly precipitation | 101.8 cm | 1951 |
| Most yearly days with precipitation | 216 | 2007 |
| Earliest freeze | October 6 | 1948 |
| Earliest day ≥ 25 °C | April 1 | 2021 |
| Earliest day ≥ 30 °C | May 16 | 1992 |
| Earliest day ≥ 35 °C | June 20 | 2017 |
| Latest freeze | May 20 | 1955 |
| Latest day ≥ 25 °C | October 18 | 2014 |
| Latest day ≥ 30 °C | October 2 | 2023 |
| Latest day ≥ 35 °C | September 9 | 2023 |
| Most days in a year < 0 °C | 67 | 2010 |
| Most days in a year ≥ 20 °C | 153 | 2018 |
| Most days in a year ≥ 25 °C | 76 | 2018 |
| Most days in a year ≥ 30 °C | 23 | 2003 |
| Most days in a year ≥ 35 °C | 7 | 2003 |
| Most days in a year ≥ 40 °C | 1 | 2022 |
|
Rennes Weather Streaks
Most consecutive days...
|
||
|---|---|---|
| With precipitation | 28 days | Nov 16 – Dec 13, 1965 |
| Without precipitation | 34 days | Jun 8 – Jul 11, 1949 |
| Freezing temperatures High temperature ≤ 0 °C |
8 days | Jan 24–31, 1947 |
| High temperature ≥ 20 °C | 104 days | May 27 – Sep 7, 2003 |
| High temperature ≥ 25 °C | 24 days | Aug 21 – Sep 13, 2016 |
| High temperature ≥ 30 °C | 15 days | Jun 22 – Jul 6, 1976 |
| High temperature ≥ 35 °C | 4 days | Aug 8–11, 2003 |
| Years | Station | Coordinates |
|---|---|---|
| 1944–2024 | Rennes-St Jacques | location |