Climate averages 1991–2020
Sofia weather
in September.
A mild, fairly dry month: the 4th warmest and one of the driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Sofia: daytime highs average 21.9°C and nights cool to about 12.3°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 35 mm of rain on roughly 7 days, which makes September a fairly dry month (one of the driest months of the year). Daylight, from sunrise to sunset, lasts about 12 h 32 min on an average September day.
The nearest other city in this atlas is Pernik (26 km away). In September its highs average 21.1°C, 0.8°C cooler than Sofia, with 32 mm of rain.
Among the 10 cities listed in Bulgaria, Sofia ranks 9th of 10 for the warmest September highs and 2nd of 10 for the driest September (rainfall, lowest first). The mean September high of those 10 cities is 23.2°C; Sofia is 1.3°C cooler than that mean.
From September to October, average highs fall by 5.4°C to 16.5°C, and monthly rainfall rises from 35 mm to 46 mm.
The annual picture
September 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
Sofia climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 3.6°C-4.3°C | -4.3°C | 39 | 7.6 | 9.49 h |
| February | 5.8°C-3.0°C | -3.0°C | 39 | 7.5 | 10.511 h |
| March | 10.1°C0.7°C | 0.7°C | 54 | 10.5 | 11.912 h |
| April | 15.2°C5.2°C | 5.2°C | 58 | 11.4 | 13.413 h |
| May | 19.9°C10.3°C | 10.3°C | 70 | 13.5 | 14.615 h |
| June | 23.6°C14.3°C | 14.3°C | 62 | 11.6 | 15.315 h |
| July | 25.9°C16.4°C | 16.4°C | 51 | 9.6 | 15.015 h |
| August | 26.4°C16.6°C | 16.6°C | 35 | 7.2 | 13.914 h |
| September, selected | 21.9°C12.3°C | 12.3°C | 35 | 6.5 | 12.513 h |
| October | 16.5°C7.3°C | 7.3°C | 46 | 6.9 | 11.111 h |
| November | 10.5°C2.1°C | 2.1°C | 36 | 6.7 | 9.810 h |
| December | 4.9°C-2.4°C | -2.4°C | 45 | 8.6 | 9.19 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
September in nearby cities
- Pernik in SeptemberBulgaria · 26 kmHigh 21.1°C · Low 11.0°C · 32 mm rain
- Leskovac in SeptemberSerbia · 117 kmHigh 23.6°C · Low 12.9°C · 41 mm rain
- Plovdiv in SeptemberBulgaria · 132 kmHigh 23.9°C · Low 13.8°C · 42 mm rain
- Pleven in SeptemberBulgaria · 132 kmHigh 24.3°C · Low 14.4°C · 47 mm rain
- Niš in SeptemberSerbia · 135 kmHigh 24.0°C · Low 13.4°C · 36 mm rain
- Kumanovo in SeptemberNorth Macedonia · 146 kmHigh 24.7°C · Low 13.6°C · 31 mm rain
- Skopje in SeptemberNorth Macedonia · 174 kmHigh 25.6°C · Low 14.3°C · 33 mm rain
- Pristina in SeptemberKosovo · 176 kmHigh 22.4°C · Low 12.5°C · 45 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 Sofia) is explained once on the Sofia year overview and on the Sources, method and limits page.