June
June · July · August
81climate match
Russia · 1991–2020
Best time to visit
Irkutsk.
June leads for comfortable weather in Irkutsk: typically 23.8°C by day, 10.1°C at night, with 70 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortJune
Typical high23.8°C
Typical low10.1°C
Rain in June70 mm
July
July · June · August
49climate match
May
May · June · August
79climate match
The weakest month is January, scoring 5 against June’s 81 — days reach only -12.8°C, 37° below the 24°C the score treats as ideal.
Month by month
The whole year,
without the guesswork.
The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.
Jan
5-12.8° / -21.6°
Feb
5-7.5° / -19.1°
Mar
51.1° / -11.4°
Apr
2310.5° / -2°
May
5718.1° / 3.7°
Jun
8123.8° / 10.1°
Jul
7525.7° / 13.4°
Aug
7522.8° / 11.4°
Sep
4716° / 4.5°
Oct
147.8° / -2.4°
Nov
5-3.2° / -11.6°
Dec
5-10.9° / -19°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | -12.8°C | -21.6°C | 14 mm | 5.1 | 8 h 11 | 5 | Strong coverage |
| February | -7.5°C | -19.1°C | 9 mm | 3.4 | 9 h 49 | 5 | Strong coverage |
| March | 1.1°C | -11.4°C | 12 mm | 3.9 | 11 h 41 | 5 | Strong coverage |
| April | 10.5°C | -2°C | 21 mm | 4.8 | 13 h 49 | 23 | Strong coverage |
| May | 18.1°C | 3.7°C | 36 mm | 6.7 | 15 h 41 | 57 | Strong coverage |
| June | 23.8°C | 10.1°C | 70 mm | 8.5 | 16 h 45 | 81 | Strong coverage |
| July | 25.7°C | 13.4°C | 107 mm | 10.2 | 16 h 20 | 75 | Strong coverage |
| August | 22.8°C | 11.4°C | 96 mm | 9.3 | 14 h 41 | 75 | Strong coverage |
| September | 16°C | 4.5°C | 53 mm | 8.5 | 12 h 35 | 47 | Strong coverage |
| October | 7.8°C | -2.4°C | 21 mm | 4.8 | 10 h 31 | 14 | Strong coverage |
| November | -3.2°C | -11.6°C | 20 mm | 6.4 | 8 h 40 | 5 | Strong coverage |
| December | -10.9°C | -19°C | 19 mm | 6.4 | 7 h 43 | 5 | Strong coverage |
What has changed
Irkutsk runs +1.5°C
on the 1961–1990 baseline.
Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.
Jan
+0.3
Feb
+1.5
Mar
+2.7
Apr
+3.6
May
+0.6
Jun
+2.4
Jul
+1.7
Aug
+2.0
Sep
+0.9
Oct
+0.9
Nov
0.0
Dec
+1.0
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 2.3°C2 Jan 1927 | -49.7°C12 Jan 1915 | 11 mm11 Jan 1996 | 41 mm2021 · driest 1 mm in 1887 | 139 |
| February | 10.2°C28 Feb 1987 | -44.7°C1 Feb 1929 | 9 mm10 Feb 1999 | 23 mm2012 · driest 1 mm in 1891 | 139 |
| March | 21.1°C30 Mar 2023 | -37.3°C1 Mar 1933 | 13 mm20 Mar 1959 | 34 mm2001 · driest 1 mm in 1907 | 139 |
| April | 29.2°C29 Apr 1899 | -31.8°C1 Apr 1909 | 39 mm29 Apr 2011 | 77 mm2023 · driest 2 mm in 1954 | 139 |
| May | 34.5°C16 May 1990 | -14.3°C1 May 1908 | 43 mm8 May 1894 | 109 mm1894 · driest 5 mm in 1924 | 139 |
| June | 35.6°C22 Jun 2010 | -6.0°C8 Jun 1909 | 114 mm28 Jun 1994 | 303 mm1938 · driest 10 mm in 1969 | 139 |
| July | 37.2°C24 Jul 1915 | 0.4°C11 Jul 1890 | 93 mm7 Jul 2001 | 344 mm1971 · driest 13 mm in 1900 | 139 |
| August | 34.7°C8 Aug 2015 | -2.7°C25 Aug 1902 | 87 mm5 Aug 1993 | 221 mm2016 · driest 20 mm in 1928 | 139 |
| September | 29.7°C13 Sep 2015 | -11.9°C27 Sep 1922 | 60 mm6 Sep 1945 | 140 mm1945 · driest 8 mm in 1889 | 138 |
| October | 25.6°C18 Oct 1946 | -30.5°C30 Oct 1901 | 58 mm1 Oct 1974 | 91 mm1974 · driest 2 mm in 1894 | 138 |
| November | 14.4°C3 Nov 2013 | -40.4°C27 Nov 1910 | 20 mm3 Nov 2015 | 38 mm1992 · driest 4 mm in 1887 | 138 |
| December | 5.3°C2 Dec 2013 | -46.3°C22 Dec 1916 | 19 mm9 Dec 1969 | 50 mm2017 · driest 2 mm in 1932 | 138 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 0 | 0 | 30 | 0 |
| February | 0 | 0 | 28 | 0 |
| March | 0 | 0 | 29 | 0 |
| April | <1 | 0 | 21 | <1 |
| May | 4 | <1 | 5 | <1 |
| June | 13 | 3 | <1 | 2 |
| July | 19 | 4 | 0 | 3 |
| August | 10 | <1 | 0 | 3 |
| September | 1 | 0 | 3 | 2 |
| October | 0 | 0 | 20 | <1 |
| November | 0 | 0 | 28 | <1 |
| December | 0 | 0 | 29 | 0 |
The best month has moved. On the 1961–1990 numbers the strongest month here was July (scoring 83); on 2011–2025 it is June (88). Both are scored the same way, from the same station — only the climate underneath changed.
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 14% | <1% | 9% | -18.9–-9.9°C |
| February | 0% | 10% | 0% | 5% | -14.2–-5.5°C |
| March | 0% | 10% | <1% | 4% | -4.7–2.6°C |
| April | 4% | 14% | <1% | 9% | 5.3–11.7°C |
| May | 27% | 21% | 2% | 19% | 14.6–19.0°C |
| June | 58% | 28% | 7% | 35% | 20.6–24.9°C |
| July | 63% | 34% | 10% | 44% | 22.8–26.6°C |
| August | 54% | 31% | 9% | 40% | 20.5–24.1°C |
| September | 18% | 26% | 4% | 26% | 13.7–17.5°C |
| October | 1% | 16% | <1% | 10% | 4.4–9.5°C |
| November | 0% | 18% | <1% | 13% | -8.3–-0.6°C |
| December | 0% | 17% | <1% | 13% | -17.9–-8.3°C |
A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.
The evidence behind this page
Nearby, measured,
and named.
- Place identity
- GeoNames 2023469
- NOAA station
- RSM00030710 · IRKUTSK
- Station distance
- 5.2 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 28 usable years
- Daylight
- Calculated from latitude 52.30°, mid-month, sunrise to sunset including refraction. Not a station measurement.
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.