Climate averages 1991–2020
Brest, France weather
in August.
A mild, moderately wet month: the warmest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a mild month in Brest, France: daytime highs average 19.1°C and nights cool to about 14.9°C. By daytime temperature it is the warmest month of the year.
Expect about 53 mm of rain on roughly 10 days, which makes August a moderately wet month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 20 min on an average August day.
The nearest other city in this atlas is Saint Helier (196 km away). In August its highs average 18.5°C, 0.6°C cooler than Brest, France, with 63 mm of rain.
Among the 57 cities listed in France, Brest, France ranks 57th of 57 for the warmest August highs and 21st of 57 for the driest August (rainfall, lowest first). The mean August high of those 57 cities is 25.0°C; Brest, France is 5.9°C cooler than that mean.
From August to September, average highs fall by 1.4°C to 17.8°C, and monthly rainfall falls from 53 mm to 52 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Brest, France climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 9.7°C6.7°C | 6.7°C | 99 | 15.3 | 8.89 h |
| February | 9.6°C6.2°C | 6.2°C | 80 | 13.4 | 10.210 h |
| March | 10.9°C7.1°C | 7.1°C | 64 | 12.6 | 11.912 h |
| April | 12.5°C8.2°C | 8.2°C | 66 | 11.9 | 13.614 h |
| May | 15.0°C10.6°C | 10.6°C | 59 | 10.5 | 15.215 h |
| June | 17.3°C12.9°C | 12.9°C | 47 | 9.7 | 16.016 h |
| July | 18.9°C14.6°C | 14.6°C | 45 | 10.1 | 15.716 h |
| August, selected | 19.1°C14.9°C | 14.9°C | 53 | 10.0 | 14.314 h |
| September | 17.8°C13.6°C | 13.6°C | 52 | 9.6 | 12.613 h |
| October | 15.2°C11.8°C | 11.8°C | 92 | 14.1 | 10.911 h |
| November | 12.3°C9.5°C | 9.5°C | 96 | 14.9 | 9.39 h |
| December | 10.4°C7.4°C | 7.4°C | 105 | 15.3 | 8.48 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Saint Helier in AugustJersey · 196 kmHigh 18.5°C · Low 16.1°C · 63 mm rain
- Rennes in AugustFrance · 210 kmHigh 23.2°C · Low 14.3°C · 46 mm rain
- Plymouth in AugustUnited Kingdom · 222 kmHigh 19.4°C · Low 14.1°C · 69 mm rain
- Nantes in AugustFrance · 255 kmHigh 23.9°C · Low 15.3°C · 47 mm rain
- Exeter in AugustUnited Kingdom · 269 kmHigh 19.7°C · Low 13.3°C · 65 mm rain
- Angers in AugustFrance · 310 kmHigh 24.5°C · Low 15.2°C · 46 mm rain
- Caen in AugustFrance · 315 kmHigh 22.6°C · Low 14.5°C · 60 mm rain
- Poole in AugustUnited Kingdom · 315 kmHigh 20.0°C · Low 14.6°C · 63 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Brest) is explained once on the Brest, France year overview and on the Sources, method and limits page.