Climate averages 1991–2020
Usol’ye-Sibirskoye weather
in September.
A mild, moderately wet month: the 5th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Usol’ye-Sibirskoye: daytime highs average 15.3°C and nights cool to about 5.5°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 53 mm of rain on roughly 10 days, which makes September a moderately wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 44 min on an average September day.
The nearest other city in this atlas is Angarsk (28 km away). In September its highs average 15.5°C, about as warm as Usol’ye-Sibirskoye, with 51 mm of rain.
Among the 236 cities listed in Russia, Usol’ye-Sibirskoye ranks joint 140th of 236 for the warmest September highs and joint 88th of 236 for the driest September (rainfall, lowest first). The mean September high of those 236 cities is 16.4°C; Usol’ye-Sibirskoye is 1.0°C cooler than that mean.
From September to October, average highs fall by 8.9°C to 6.4°C, and monthly rainfall falls from 53 mm to 18 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
Usol’ye-Sibirskoye climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -15.7°C-24.8°C | -24.8°C | 4.2 | 1.2 | 8.28 h |
| February | -9.6°C-21.4°C | -21.4°C | 4.2 | 1.5 | 9.810 h |
| March | -0.4°C-13.0°C | -13.0°C | 8.9 | 3.0 | 11.812 h |
| April | 9.5°C-2.8°C | -2.8°C | 20 | 5.5 | 13.914 h |
| May | 17.2°C3.7°C | 3.7°C | 34 | 8.4 | 15.816 h |
| June | 23.4°C11.5°C | 11.5°C | 63 | 10.4 | 16.817 h |
| July | 25.0°C14.8°C | 14.8°C | 88 | 12.3 | 16.316 h |
| August | 22.6°C12.6°C | 12.6°C | 86 | 11.2 | 14.715 h |
| September, selected | 15.3°C5.5°C | 5.5°C | 53 | 10.3 | 12.713 h |
| October | 6.4°C-2.5°C | -2.5°C | 18 | 5.4 | 10.711 h |
| November | -4.9°C-13.1°C | -13.1°C | 11 | 3.6 | 8.89 h |
| December | -13.6°C-22.1°C | -22.1°C | 8.6 | 3.1 | 7.78 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
- Angarsk in SeptemberRussia · 28 kmHigh 15.5°C · Low 5.5°C · 51 mm rain
- Irkutsk in SeptemberRussia · 67 kmHigh 15.4°C · Low 5.8°C · 61 mm rain
- Ulan-Ude in SeptemberRussia · 288 kmHigh 15.6°C · Low 5.2°C · 44 mm rain
- Darhan in SeptemberMongolia · 396 kmHigh 17.9°C · Low 6.2°C · 39 mm rain
- Bratsk in SeptemberRussia · 398 kmHigh 12.0°C · Low 6.8°C · 42 mm rain
- Erdenet in SeptemberMongolia · 415 kmHigh 14.8°C · Low 4.4°C · 38 mm rain
- Ulan Bator in SeptemberMongolia · 585 kmHigh 15.6°C · Low 3.0°C · 39 mm rain
- Ust’-Ilimsk in SeptemberRussia · 587 kmHigh 12.1°C · Low 5.2°C · 51 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 Usol’ye-Sibirskoye) is explained once on the Usol’ye-Sibirskoye year overview and on the Sources, method and limits page.