Ust’-Kut, Russia Climate
The warmest month is July, with an average high of 24°C; the coldest is January, with an average low of -28°C. A normal year brings 554 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
- -1°C
- Reanalysis high
- 19°Cin 2019
- Reanalysis low
- -8°Cin 1998
- Chance of a wet day
- 41%
- Daylight
- 12 h 02 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 | -28°C | -3°C (1995) | -53°C (2006) | 25 mm | 9.3 |
| February | -15°C | -24°C | -1°C (1998) | -53°C (2001) | 23 mm | 8.5 |
| March | -8°C | -17°C | 2°C (2014) | -40°C (1995) | 28 mm | 9.3 |
| April | 0°C | -8°C | 18°C (2014) | -29°C (1992) | 39 mm | 12.0 |
| May | 11°C | 0°C | 27°C (1992) | -12°C (2006) | 59 mm | 15.5 |
| June | 20°C | 8°C | 32°C (2017) | -4°C (1992) | 66 mm | 15.0 |
| July | 24°C | 12°C | 36°C (1994) | 3°C (2007) | 78 mm | 12.4 |
| August | 21°C | 9°C | 35°C (1993) | -3°C (2017) | 71 mm | 12.4 |
| September | 11°C | 1°C | 28°C (2007) | -8°C (1992) | 54 mm | 12.0 |
| October | 1°C | -6°C | 17°C (2007) | -23°C (2006) | 47 mm | 12.4 |
| November | -12°C | -19°C | 4°C (2013) | -47°C (2009) | 36 mm | 12.0 |
| December | -19°C | -27°C | -1°C (2013) | -55°C (2008) | 28 mm | 9.3 |
| Year | 1°C | -8°C | 554 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.
554 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’-Kut.
Days with a mean dew point of 18°C or more are rare here in every month.
| Month | Dew point | Humidity | Dry | Comfortable | Humid | Muggy | Oppressive | Miserable |
|---|---|---|---|---|---|---|---|---|
| January | -24°C | 99% | 100% | 0% | 0% | 0% | 0% | 0% |
| February | -20°C | 99% | 100% | 0% | 0% | 0% | 0% | 0% |
| March | -12°C | 99% | 100% | 0% | 0% | 0% | 0% | 0% |
| April | -5°C | 93% | 100% | 0% | 0% | 0% | 0% | 0% |
| May | 1°C | 75% | 100% | 0% | 0% | 0% | 0% | 0% |
| June | 9°C | 74% | 79% | 17% | 3% | 0% | 0% | 0% |
| July | 12°C | 73% | 57% | 34% | 9% | 0% | 0% | 0% |
| August | 9°C | 73% | 87% | 12% | 1% | 0% | 0% | 0% |
| September | 2°C | 80% | 100% | 0% | 0% | 0% | 0% | 0% |
| October | -5°C | 86% | 100% | 0% | 0% | 0% | 0% | 0% |
| November | -16°C | 97% | 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 58 percent covered on average; the cloudiest is October, at 78 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 January, averaging 8.3 km/h at 10 meters (33 feet) above the ground.
Daylight and sunshine
The longest day is Jun 20, with 17 h 51 min of daylight; the shortest is Dec 20, with 6 h 45 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’-Kut 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 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.