Climate-Zone.com

HomeCitiesRussiaIrkutskTools › Weather extremes

Weather extremes

How extreme does Irkutsk's weather get?

The hottest, coldest, wettest and snowiest days Irkutsk has recorded — the outer limits of what its weather can do, and how far they sit beyond a normal day.

Based on 50+ years of daily weather observations (1971–present), from the Irkutsk station 5 km away. Updated through August 2025 — an all-time extreme only changes when a more extreme day actually occurs, so some dates are old. That is normal, not stale data.

The four kinds of extreme

The hottest, coldest, wettest and snowiest single days Irkutsk has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
96°F Jul 24, 2002

That is about 18°F hotter than a normal July afternoon in Irkutsk (typical high near 78°F).

The three most extreme on record

1 96°F Jul 24, 2002
2 96°F Jun 22, 2010
3 96°F Jun 24, 2025
❄️ Coldest night
-45°F Jan 8, 2001

About 38°F colder than a normal January night in Irkutsk (typical low near -7°F).

The three most extreme on record

1 -45°F Jan 8, 2001
2 -42°F Jan 1, 1977
3 -42°F Dec 22, 1979
🌧️ Most rain in one day
4.50 in Jun 28, 1994

More rain in a single day than Irkutsk usually gets in the whole month of June (typical June total about 2.7 in).

The three most extreme on record

1 4.50 in Jun 28, 1994
2 3.65 in Jul 7, 2001
3 3.43 in Aug 5, 1993

How hot and cold it gets, month by month

The shaded band is the normal range of daily temperatures for each month. The dots show the most extreme it has ever been — so you can see how far beyond a normal day the records really sit.

-70°-50°-30°-10°10°30°50°70°90°110° all-time high 96°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Irkutsk's record heat sits well above even a hot day for the season — July's 96°F is about 18°F beyond a normal hot afternoon. Its record cold is just as far below a normal winter night — the dots mark how rare each extreme really is.

In plain terms

In a normal year, Irkutsk's warmest days reach the high 70s°F and its coldest nights drop to the low 0s°F. But across the record it has gone as high as 96°F and as low as −45°F. A single day has delivered over 5 inches of rain. Those are the outer edges worth knowing if you are moving here, planning a trip, or thinking about a house.
Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 28 years of daily observations at Irkutsk, a weather station, about 5 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →