A consolidated reference for Irkutsk climate: monthly averages, rebuilt from public data on a schedule. Expect -21.1 C at the coldest (Jan) and 20.3 C at the warmest (Jul) — a 41.4 C spread. Expect a wet season rather than rain year-round: Jul brings 2.73 mm/day against 0.32 mm/day in Feb. Taken together that is roughly 415 mm of rain a year for the grid cell. Values come from a public open API; a successful result is cached so a later outage never blanks the page. Scroll for the month-by-month figures, or jump to a neighbouring location from the links below.
Annual mean temperature 0.3 C
Warmest month Jul (20.3 C)
Coldest month Jan (-21.1 C)
Wettest month Jul (2.73 mm/day)
All-time record high 38.3 C
All-time record low -48.6 C
Annual precipitation 416 mm / year
Coordinates 52.29566, 104.29076
Population 623,869
Average monthly temperature and rainfall in Irkutsk
Month
Mean temp (C)
Rain (mm/day)
Record high (C)
Record low (C)
Jan
-21.1
0.36
-0.4
-48.6
Feb
-17.9
0.32
0.4
-45.8
Mar
-8.0
0.42
14.4
-33.6
Apr
2.7
0.72
26.2
-18.8
May
9.7
1.31
32.8
-5.2
Jun
17.8
1.89
37.9
0.4
Jul
20.3
2.73
38.3
4.8
Aug
17.3
2.66
37.7
0.1
Sep
9.6
1.56
30.8
-5.6
Oct
0.6
0.68
21.7
-18.3
Nov
-9.6
0.50
9.7
-30.9
Dec
-18.5
0.50
-0.8
-41.2
What the Irkutsk climate table shows
Values are multi-decadal climatological averages for the 52.29566, 104.29076 grid cell, not a single year. Rain is the daily mean, so a value of 2.00 mm/day is about 60 mm across a 30-day month. Averages smooth over extremes, so use them for planning rather than for what to pack for next Tuesday.
Frequently asked questions
Does Irkutsk get the same every year?
Close to it. Averaging decades smooths variation, so treat these as typical rather than guaranteed.