Ust’-Ilimsk, Russia Climate
The warmest month is July, with an average high of 24°C; the coldest is January, with an average low of -27°C. A normal year brings 547 mm of precipitation.
Temperature through the year
The normal daily high and low. The line marks today.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
Normals for Sep 25
- Normal high
- 8°C
- Normal low
- 0°C
- Reanalysis high
- 20°Cin 1997
- Reanalysis low
- -7°Cin 1998
- Chance of a wet day
- 43%
- Daylight
- 12 h 01 min
Month by month
Averages for 1991-2020. Wet days have at least 1 mm of precipitation in the reanalysis. Each month links to its own page.
| Month | Avg high | Avg low | Warmest | Coldest | Precipitation | Wet days |
|---|---|---|---|---|---|---|
| January | -20°C | -27°C | -2°C (2013) | -56°C (2001) | 25 mm | 9.3 |
| February | -15°C | -24°C | 0°C (2020) | -54°C (2001) | 20 mm | 8.5 |
| March | -7°C | -16°C | 1°C (1995) | -38°C (1995) | 28 mm | 9.3 |
| April | 2°C | -7°C | 23°C (2020) | -28°C (1992) | 42 mm | 12.0 |
| May | 12°C | 1°C | 29°C (1992) | -12°C (2001) | 59 mm | 15.5 |
| June | 21°C | 10°C | 32°C (2018) | -4°C (1992) | 66 mm | 12.0 |
| July | 24°C | 13°C | 35°C (1994) | 5°C (2011) | 68 mm | 12.4 |
| August | 21°C | 10°C | 32°C (2017) | -2°C (2006) | 59 mm | 12.4 |
| September | 11°C | 2°C | 25°C (2007) | -7°C (1992) | 60 mm | 12.0 |
| October | 1°C | -5°C | 16°C (2018) | -26°C (2009) | 50 mm | 15.5 |
| November | -11°C | -18°C | 5°C (2013) | -48°C (2002) | 39 mm | 12.0 |
| December | -19°C | -27°C | 0°C (2013) | -55°C (2008) | 31 mm | 9.3 |
| Year | 2°C | -7°C | 547 mm | 140 |
Precipitation
Rain and melted snow together. The chance of a wet day is the share of days with at least 1 mm of precipitation in the reanalysis.
547 mm in a normal year, most in July.
Chance of a wet day
- Chance of a wet day
Humidity and comfort
NASA POWER reanalysis, 1991-2020, for the grid cell around Ust’-Ilimsk.
The muggiest month is July, when 2 percent of days are muggy or worse, with a mean dew point of 18°C or more.
| Month | Dew point | Humidity | Dry | Comfortable | Humid | Muggy | Oppressive | Miserable |
|---|---|---|---|---|---|---|---|---|
| January | -24°C | 99% | 100% | 0% | 0% | 0% | 0% | 0% |
| February | -19°C | 99% | 100% | 0% | 0% | 0% | 0% | 0% |
| March | -11°C | 98% | 100% | 0% | 0% | 0% | 0% | 0% |
| April | -4°C | 89% | 100% | 0% | 0% | 0% | 0% | 0% |
| May | 2°C | 72% | 99% | 1% | 0% | 0% | 0% | 0% |
| June | 10°C | 73% | 72% | 21% | 6% | 0% | 0% | 0% |
| July | 13°C | 74% | 43% | 38% | 17% | 2% | 0% | 0% |
| August | 10°C | 76% | 78% | 19% | 3% | 0% | 0% | 0% |
| September | 3°C | 81% | 99% | 1% | 0% | 0% | 0% | 0% |
| October | -4°C | 86% | 100% | 0% | 0% | 0% | 0% | 0% |
| November | -15°C | 96% | 100% | 0% | 0% | 0% | 0% | 0% |
| December | -23°C | 99% | 100% | 0% | 0% | 0% | 0% | 0% |
Comfort is judged by the day's mean dew point: dry below 13°C, comfortable to 16°C, humid to 18°C, muggy to 21°C, oppressive to 24°C, miserable above.
Clouds
Average share of the sky covered, from satellite (CERES and GEWEX SRB) by way of NASA POWER, 1991-2020.
The clearest month is February, with the sky 56 percent covered on average; the cloudiest is October, at 81 percent.
Wind
The mean wind speed over the whole day, from the MERRA-2 reanalysis by way of NASA POWER. Gusts run well above it.
The windiest month is April, averaging 9.4 km/h at 10 meters (33 feet) above the ground.
Daylight and sunshine
The longest day is Jun 18, with 18 h 11 min of daylight; the shortest is Dec 19, with 6 h 27 min.
- Day length
Solar energy
Average daily sunshine reaching the ground on a flat surface, in kilowatt-hours per square meter, clouds included.
Month pages
The weather in Ust’-Ilimsk in each month, day by day.
What this means
A normal is the average of the thirty years 1991 to 2020, the period the World Meteorological Organization and NOAA use for comparison. It is an average, not a forecast: most days depart from it, and some by a long way.
Where no station record is within reach, the extremes shown are the highest and lowest the reanalysis produced for the date in 1991-2020, not measured records.
Cloud, humidity, wind and sunshine come from a reanalysis: a weather model run over the past with every observation fed in, averaged over a grid cell about 50 km across. It is consistent everywhere on Earth; it smooths local detail such as a lake shore or a valley.
More for this place
Sources
Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.