Climate averages 1991–2020
Brest weather
in September.
A mild, moderately wet month: the 5th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Brest: daytime highs average 18.1°C and nights cool to about 10.2°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 60 mm of rain on roughly 10 days, which makes September a moderately wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 43 min on an average September day.
The nearest other city in this atlas is Siedlce (98 km away). In September its highs average 17.7°C, about as warm as Brest, with 57 mm of rain.
Among the 18 cities listed in Belarus, Brest ranks 1st of 18 for the warmest September highs and 15th of 18 for the driest September (rainfall, lowest first). The mean September high of those 18 cities is 16.8°C; Brest is 1.2°C warmer than that mean.
From September to October, average highs fall by 6.3°C to 11.8°C, and monthly rainfall falls from 60 mm to 45 mm.
The annual picture
September in context
Monthly precipitation
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 climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -0.4°C-5.0°C | -5.0°C | 35 | 9.0 | 8.38 h |
| February | 1.0°C-4.5°C | -4.5°C | 35 | 9.6 | 9.910 h |
| March | 6.1°C-1.7°C | -1.7°C | 41 | 10.0 | 11.812 h |
| April | 13.2°C3.5°C | 3.5°C | 47 | 10.0 | 13.914 h |
| May | 18.7°C9.0°C | 9.0°C | 73 | 12.4 | 15.716 h |
| June | 22.0°C12.7°C | 12.7°C | 71 | 12.2 | 16.717 h |
| July | 24.1°C15.0°C | 15.0°C | 84 | 13.0 | 16.216 h |
| August | 23.6°C14.4°C | 14.4°C | 65 | 10.1 | 14.715 h |
| September, selected | 18.1°C10.2°C | 10.2°C | 60 | 9.5 | 12.713 h |
| October | 11.8°C5.3°C | 5.3°C | 45 | 9.3 | 10.711 h |
| November | 5.6°C1.2°C | 1.2°C | 39 | 9.0 | 8.99 h |
| December | 0.9°C-3.2°C | -3.2°C | 40 | 9.6 | 7.88 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet 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
September in nearby cities
- Siedlce in SeptemberPoland · 98 kmHigh 17.7°C · Low 10.6°C · 57 mm rain
- Białystok in SeptemberPoland · 120 kmHigh 17.4°C · Low 10.0°C · 58 mm rain
- Lublin in SeptemberPoland · 124 kmHigh 18.0°C · Low 10.5°C · 66 mm rain
- Pinsk in SeptemberBelarus · 160 kmHigh 17.7°C · Low 10.2°C · 57 mm rain
- Wawer in SeptemberPoland · 174 kmHigh 18.3°C · Low 10.7°C · 58 mm rain
- Hrodna in SeptemberBelarus · 174 kmHigh 17.1°C · Low 10.0°C · 59 mm rain
- Praga Południe in SeptemberPoland · 180 kmHigh 18.4°C · Low 10.7°C · 57 mm rain
- Warsaw in SeptemberPoland · 185 kmHigh 18.2°C · Low 10.6°C · 57 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 year overview and on the Sources, method and limits page.