Home › Cities › France › Brest
Brest, Brittany climate
Cfb Oceanic / temperate
Brest has a mildly seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is August with an average daily high near 21°C, while the coldest is January averaging around 4°C at night. Around 1142 mm of precipitation falls each year, peaking in December (141 mm) and easing off in June (61 mm).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Brest climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 10 | 10 | 12 | 14 | 17 | 19 | 21 | 21 | 19 | 16 | 13 | 10 |
| Avg temp (°C) | 7 | 7 | 8 | 10 | 13 | 15 | 17 | 17 | 15 | 13 | 10 | 8 |
| Avg low (°C) | 4 | 4 | 5 | 6 | 9 | 11 | 13 | 13 | 11 | 9 | 7 | 5 |
| Precipitation (mm) | 131 | 110 | 78 | 81 | 74 | 61 | 67 | 74 | 66 | 121 | 136 | 141 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 10 | 10 | 12 | 14 | 17 | 19 |
| Avg temp (°C) | 7 | 7 | 8 | 10 | 13 | 15 |
| Avg low (°C) | 4 | 4 | 5 | 6 | 9 | 11 |
| Precipitation (mm) | 131 | 110 | 78 | 81 | 74 | 61 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 21 | 21 | 19 | 16 | 13 | 10 |
| Avg temp (°C) | 17 | 17 | 15 | 13 | 10 | 8 |
| Avg low (°C) | 13 | 13 | 11 | 9 | 7 | 5 |
| Precipitation (mm) | 67 | 74 | 66 | 121 | 136 | 141 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 83 | 81 | 77 | 70 | 70 | 68 | 68 | 71 | 69 | 75 | 80 | 81 |
| Relative humidity (%) | 88 | 87 | 86 | 84 | 83 | 83 | 82 | 81 | 82 | 85 | 87 | 88 |
| Wind speed (m/s) | 5.6 | 5.4 | 5.1 | 4.7 | 4.4 | 4.0 | 3.9 | 3.8 | 4.1 | 4.8 | 5.3 | 5.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 83 | 81 | 77 | 70 | 70 | 68 |
| Relative humidity (%) | 88 | 87 | 86 | 84 | 83 | 83 |
| Wind speed (m/s) | 5.6 | 5.4 | 5.1 | 4.7 | 4.4 | 4.0 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 68 | 71 | 69 | 75 | 80 | 81 |
| Relative humidity (%) | 82 | 81 | 82 | 85 | 87 | 88 |
| Wind speed (m/s) | 3.9 | 3.8 | 4.1 | 4.8 | 5.3 | 5.6 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Guipavas / Brest Bretagne, a weather station, about 8 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.