Climate averages 1991–2020
Irkutsk weather
in May.
A mild, fairly dry month: the 4th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Irkutsk: daytime highs average 16.8°C and nights cool to about 3.3°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 38 mm of rain on roughly 9 days, which makes May a fairly dry month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 15 h 41 min on an average May day.
The nearest other city in this atlas is Angarsk (39 km away). In May its highs average 17.4°C, 0.6°C warmer than Irkutsk, with 33 mm of rain.
Among the 236 cities listed in Russia, Irkutsk ranks joint 150th of 236 for the warmest May highs and joint 20th of 236 for the driest May (rainfall, lowest first). The mean May high of those 236 cities is 17.0°C; Irkutsk is 0.2°C cooler than that mean.
From May to June, average highs rise by 6.0°C to 22.8°C, and monthly rainfall rises from 38 mm to 65 mm.
The annual picture
May 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, selected | 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 | 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
May in nearby cities
- Angarsk in MayRussia · 39 kmHigh 17.4°C · Low 3.6°C · 33 mm rain
- Usol’ye-Sibirskoye in MayRussia · 67 kmHigh 17.2°C · Low 3.7°C · 34 mm rain
- Ulan-Ude in MayRussia · 232 kmHigh 17.1°C · Low 3.1°C · 31 mm rain
- Darhan in MayMongolia · 333 kmHigh 19.1°C · Low 4.5°C · 33 mm rain
- Erdenet in MayMongolia · 363 kmHigh 15.6°C · Low 2.7°C · 35 mm rain
- Bratsk in MayRussia · 461 kmHigh 10.9°C · Low 1.9°C · 38 mm rain
- Ulan Bator in MayMongolia · 522 kmHigh 15.8°C · Low 1.7°C · 34 mm rain
- Chita in MayRussia · 628 kmHigh 16.5°C · Low 2.9°C · 39 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.