Climate averages 1991–2020
Ust’-Ilimsk weather
by month.
See how the year changes. July has the highest average daily maximum; February has the lowest average monthly precipitation.
Long-term climate patterns, not a forecast for a particular trip.
Across the year Ust’-Ilimsk averages a daytime high of 2.6°C and a nighttime low of -4.8°C, with about 434 mm of precipitation on roughly 105 days. July is the warmest month (average high 23.6°C) and January the coolest (-18.5°C). July is the wettest month with 59 mm; February is the driest with 12 mm.
The annual picture
A year in Ust’-Ilimsk
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
Ust’-Ilimsk climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -18.5°C-24.1°C | -24.1°C | 14 | 5.1 | 7.37 h |
| February | -14.1°C-20.7°C | -20.7°C | 12 | 4.5 | 9.39 h |
| March | -5.0°C-12.5°C | -12.5°C | 19 | 6.3 | 11.812 h |
| April | 3.5°C-4.7°C | -4.7°C | 28 | 7.8 | 14.314 h |
| May | 12.5°C2.6°C | 2.6°C | 43 | 10.6 | 16.717 h |
| June | 20.8°C11.2°C | 11.2°C | 56 | 10.5 | 18.018 h |
| July | 23.6°C15.0°C | 15.0°C | 59 | 10.0 | 17.417 h |
| August | 20.6°C12.6°C | 12.6°C | 57 | 9.9 | 15.415 h |
| September | 12.1°C5.2°C | 5.2°C | 51 | 10.9 | 12.913 h |
| October | 2.6°C-2.8°C | -2.8°C | 41 | 11.4 | 10.410 h |
| November | -9.5°C-15.8°C | -15.8°C | 31 | 9.7 | 8.08 h |
| December | -16.9°C-23.2°C | -23.2°C | 22 | 7.7 | 6.67 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
Nearby cities
- BratskRussia · 217 kmHigh 2.7°C · Low -3.6°C · 353 mm precipitation a year
- KanskRussia · 464 kmHigh 5.2°C · Low -3.5°C · 413 mm precipitation a year
- ZelenogorskRussia · 531 kmHigh 5.5°C · Low -3.2°C · 452 mm precipitation a year
- Zheleznogorsk (Krasnoyarsk Krai), RussiaRussia · 584 kmHigh 5.6°C · Low -3.1°C · 520 mm precipitation a year
- Usol’ye-SibirskoyeRussia · 587 kmHigh 6.3°C · Low -4.3°C · 400 mm precipitation a year
- AngarskRussia · 610 kmHigh 6.6°C · Low -4.2°C · 382 mm precipitation a year
- KrasnoyarskRussia · 627 kmHigh 5.7°C · Low -3.1°C · 457 mm precipitation a year
- IrkutskRussia · 643 kmHigh 6.8°C · Low -3.6°C · 447 mm precipitation a year
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 limitsWhat do the high and low temperatures mean?
We average the daily maximum and daily minimum for each calendar month over 1991–2020. They are not record extremes, a forecast range or temperatures at a fixed time of day.
How is a rain day counted?
A local calendar day (standard time, UTC+8, no daylight saving) with at least 1 mm of total precipitation counts as one rain day. We count these for each year and month, then average across 30 years. The average does not predict which days will be wet.
Where do the numbers come from?
ERA5-Land (temperature) and ERA5 (precipitation) reanalysis from the Copernicus Climate Change Service, read from the Open-Meteo open-data archive. Temperature comes from the 0.1° model cell at 58.00°, 102.70° (2 km from the city centre), adjusted up by 0.4°C for the difference between the city's elevation (278 m) and the cell's (338 m). Rain comes from the 0.25° cell at 58.00°, 102.75°. These are model estimates, not weather-station readings; coast, hills and city streets can differ.
Does this page show sunshine, humidity or sea temperature?
No. The data used here contain air temperature and precipitation only. Daylight hours are calculated from the city's latitude (sunrise to sunset), not measured sunshine.