Climate averages 1991–2020
Omsk weather
in September.
A mild, fairly dry 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 Omsk: daytime highs average 15.1°C and nights cool to about 7.1°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 33 mm of rain on roughly 8 days, which makes September a fairly dry month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 48 min on an average September day.
The nearest other city in this atlas is Petropavl (270 km away). In September its highs average 14.9°C, about as warm as Omsk, with 38 mm of rain.
Among the 236 cities listed in Russia, Omsk ranks joint 155th of 236 for the warmest September highs and joint 9th of 236 for the driest September (rainfall, lowest first). The mean September high of those 236 cities is 16.4°C; Omsk is 1.2°C cooler than that mean.
From September to October, average highs fall by 8.3°C to 6.9°C, and monthly rainfall falls from 33 mm to 32 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
Omsk climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -13.2°C-19.9°C | -19.9°C | 14 | 4.9 | 7.88 h |
| February | -10.6°C-17.5°C | -17.5°C | 12 | 4.2 | 9.610 h |
| March | -2.5°C-10.5°C | -10.5°C | 18 | 5.2 | 11.812 h |
| April | 9.2°C-1.3°C | -1.3°C | 30 | 7.4 | 14.114 h |
| May | 18.0°C6.2°C | 6.2°C | 36 | 8.0 | 16.116 h |
| June | 22.6°C12.6°C | 12.6°C | 53 | 10.0 | 17.317 h |
| July | 24.0°C15.1°C | 15.1°C | 62 | 11.2 | 16.817 h |
| August | 21.7°C13.0°C | 13.0°C | 61 | 10.8 | 15.015 h |
| September, selected | 15.1°C7.1°C | 7.1°C | 33 | 7.8 | 12.813 h |
| October | 6.9°C0.4°C | 0.4°C | 32 | 8.0 | 10.511 h |
| November | -3.9°C-9.6°C | -9.6°C | 29 | 7.6 | 8.58 h |
| December | -10.3°C-16.7°C | -16.7°C | 21 | 6.6 | 7.37 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
- Petropavl in SeptemberKazakhstan · 270 kmHigh 14.9°C · Low 7.3°C · 38 mm rain
- Kokshetau in SeptemberKazakhstan · 321 kmHigh 16.1°C · Low 7.6°C · 32 mm rain
- Pavlodar in SeptemberKazakhstan · 384 kmHigh 17.9°C · Low 8.3°C · 26 mm rain
- Ekibastuz in SeptemberKazakhstan · 386 kmHigh 18.1°C · Low 8.2°C · 25 mm rain
- Astana in SeptemberKazakhstan · 443 kmHigh 17.7°C · Low 7.5°C · 25 mm rain
- Tobolsk in SeptemberRussia · 474 kmHigh 12.6°C · Low 6.3°C · 57 mm rain
- Kurgan in SeptemberRussia · 511 kmHigh 15.3°C · Low 7.7°C · 43 mm rain
- Tyumen in SeptemberRussia · 542 kmHigh 13.9°C · Low 7.0°C · 50 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 Omsk) is explained once on the Omsk year overview and on the Sources, method and limits page.