Brest climate
Brest (Brittany, France) has a temperate oceanic climate (Köppen Cfb). The average temperature over the year is 12 °C54 °F, and about 897 mm35 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Brest climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin | Frost days |
|---|---|---|---|---|---|
| Jan | 1049 | 642 | 846 | 1044.1 | 2 |
| Feb | 949 | 541 | 745 | 873.4 | 1 |
| Mar | 1152 | 643 | 847 | 662.6 | 0 |
| Apr | 1356 | 745 | 1050 | 542.1 | 0 |
| May | 1660 | 1049 | 1355 | 562.2 | 0 |
| Jun | 1865 | 1254 | 1560 | 542.1 | 0 |
| Jul | 2068 | 1457 | 1763 | 552.2 | 0 |
| Aug | 2068 | 1457 | 1763 | 582.3 | 0 |
| Sep | 1966 | 1355 | 1660 | 451.8 | 0 |
| Oct | 1661 | 1151 | 1356 | 953.7 | 0 |
| Nov | 1355 | 947 | 1151 | 1114.4 | 0 |
| Dec | 1050 | 644 | 847 | 1104.3 | 1 |
| Year | 2068 | 541 | 1254 | 89735 | 4 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total. Frost days are for the whole grid cell.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 88% | 85% | 1.0 | 8:44 |
| Feb | 86% | 82% | 1.7 | 10:07 |
| Mar | 86% | 78% | 3.0 | 11:45 |
| Apr | 83% | 69% | 4.7 | 13:36 |
| May | 83% | 70% | 5.6 | 15:12 |
| Jun | 83% | 68% | 6.0 | 16:05 |
| Jul | 82% | 69% | 5.7 | 15:43 |
| Aug | 82% | 71% | 4.9 | 14:19 |
| Sep | 82% | 69% | 3.8 | 12:30 |
| Oct | 85% | 76% | 2.3 | 10:43 |
| Nov | 87% | 82% | 1.2 | 9:07 |
| Dec | 88% | 84% | 0.8 | 8:20 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Brest is like
The warmest month is August, with an average high of 20 °C68 °F and a low of 14 °C57 °F. The coldest is February, when highs average 9 °C49 °F and lows 5 °C41 °F. There is a clear seasonal cycle, with 9.8 °C17.6 °F between the average temperature of the warmest and the coolest month.
Annual precipitation is moderate at about 897 mm35 in. The wettest three-month stretch is November–January, which brings 36% of the annual total. The wettest month is November (111 mm4.4 in), the driest is September (45 mm1.8 in).
Relative humidity ranges from 82% in July to 88% in January. The clearest skies (lowest average cloud amount, 68%) are typical of June. Average wind speed near the ground ranges from 14 km/h (9 mph) in August to 20 km/h (12 mph) in January. Daylight lasts from about 8.3 hours in December to 16.1 hours in June.
Best time to visit Brest
Based on these averages, the most comfortable months for sightseeing and outdoor activities are June–September: average highs of 18 °C65 °F to 20 °C68 °F with 45 mm1.8 in to 58 mm2.3 in of precipitation per month.
The most challenging month is January, which is cold, with average highs of 10 °C49 °F.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Brest
- Winter (December–February) — highs 949 to 10 °C50 °F, lows 541 to 6 °C44 °F, about 101 mm4.0 in of precipitation a month. Pack a warm coat, layers and closed shoes and an umbrella or light rain jacket.
- Spring (March–May) — highs 1152 to 16 °C60 °F, lows 643 to 10 °C49 °F, about 59 mm2.3 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket.
- Summer (June–August) — highs 1865 to 20 °C68 °F, lows 1254 to 14 °C57 °F, about 56 mm2.2 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket.
- Autumn (September–November) — highs 1355 to 19 °C66 °F, lows 947 to 13 °C55 °F, about 84 mm3.3 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket.
How Brest compares
Compared with Rennes, about 210 km to the east, Brest has practically the same average temperature and receives 27% more precipitation (897 mm35 in vs 708 mm28 in). The difference is largest in December (2.5 °C4.5 °F warmer).
Of the 36 places in France covered by World Climates, Brest is the 13th warmest by annual mean temperature and the 2nd wettest by annual precipitation. See all of them on the France climate page.
Places in other countries with the most similar temperature and rainfall pattern: Bournemouth (United Kingdom, Cfb), Jersey (St Helier) (United Kingdom, Cfb) and Exeter (United Kingdom, Cfb).
Nearby places
- Guernsey (St Peter Port) 186 km · 12 °C54 °F · 847 mm33 in
- Jersey (St Helier) 196 km · 12 °C54 °F · 772 mm30 in
- Rennes 210 km · 12 °C53 °F · 708 mm28 in
- Isles of Scilly (Hugh Town) 215 km · 12 °C54 °F · 1,003 mm40 in
- Plymouth 222 km · 11 °C53 °F · 1,164 mm46 in
- Nantes 255 km · 12 °C54 °F · 800 mm31 in
- Exeter 269 km · 11 °C52 °F · 1,087 mm43 in
- Angers 310 km · 12 °C53 °F · 714 mm28 in
Frequently asked questions
What is the warmest month in Brest?
August is the warmest month in Brest, with an average high of 20 °C (68 °F) and an average low of 14 °C (57 °F).
What is the coldest month in Brest?
February is the coldest month, with an average high of 9 °C (49 °F) and an average low of 5 °C (41 °F).
When does it rain the most in Brest?
November is the wettest month with about 111 mm (4.4 in) of precipitation; September is the driest with about 45 mm (1.8 in).
What is the best time to visit Brest?
Judging by long-term averages, the most comfortable months are June–September.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.