Climate averages 1991–2020
Irkutsk weather
in July.
A warm, wet month: the warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a warm month in Irkutsk: daytime highs average 24.6°C and nights cool to about 14.0°C. By daytime temperature it is the warmest month of the year.
Expect about 94 mm of rain on roughly 12 days, which makes July a wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 16 h 16 min on an average July day.
The nearest other city in this atlas is Angarsk (39 km away). In July its highs average 25.2°C, 0.6°C warmer than Irkutsk, with 82 mm of rain.
Among the 236 cities listed in Russia, Irkutsk ranks joint 83rd of 236 for the warmest July highs and 222nd of 236 for the driest July (rainfall, lowest first). The mean July high of those 236 cities is 24.1°C; Irkutsk is 0.4°C warmer than that mean.
From July to August, average highs fall by 2.3°C to 22.2°C, and monthly rainfall rises from 94 mm to 101 mm.
The annual picture
July 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
Irkutsk climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -13.8°C-22.9°C | -22.9°C | 5.5 | 1.9 | 8.38 h |
| February | -8.2°C-20.0°C | -20.0°C | 5.2 | 1.8 | 9.910 h |
| March | 0.2°C-12.0°C | -12.0°C | 10 | 3.4 | 11.812 h |
| April | 9.4°C-2.7°C | -2.7°C | 22 | 5.6 | 13.914 h |
| May | 16.8°C3.3°C | 3.3°C | 38 | 8.9 | 15.716 h |
| June | 22.8°C10.7°C | 10.7°C | 65 | 10.3 | 16.717 h |
| July, selected | 24.6°C14.0°C | 14.0°C | 94 | 12.2 | 16.316 h |
| August | 22.2°C12.4°C | 12.4°C | 101 | 11.6 | 14.715 h |
| September | 15.4°C5.8°C | 5.8°C | 61 | 10.2 | 12.713 h |
| October | 6.9°C-1.8°C | -1.8°C | 23 | 5.7 | 10.711 h |
| November | -3.5°C-11.0°C | -11.0°C | 13 | 4.0 | 8.89 h |
| December | -11.4°C-19.4°C | -19.4°C | 9.5 | 3.5 | 7.88 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
July in nearby cities
- Angarsk in JulyRussia · 39 kmHigh 25.2°C · Low 14.6°C · 82 mm rain
- Usol’ye-Sibirskoye in JulyRussia · 67 kmHigh 25.0°C · Low 14.8°C · 88 mm rain
- Ulan-Ude in JulyRussia · 232 kmHigh 25.9°C · Low 14.4°C · 53 mm rain
- Darhan in JulyMongolia · 333 kmHigh 27.2°C · Low 15.9°C · 68 mm rain
- Erdenet in JulyMongolia · 363 kmHigh 22.9°C · Low 12.9°C · 91 mm rain
- Bratsk in JulyRussia · 461 kmHigh 21.0°C · Low 14.0°C · 58 mm rain
- Ulan Bator in JulyMongolia · 522 kmHigh 23.7°C · Low 11.9°C · 66 mm rain
- Chita in JulyRussia · 628 kmHigh 25.0°C · Low 14.2°C · 83 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 Irkutsk) is explained once on the Irkutsk year overview and on the Sources, method and limits page.