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Weather extremes

How extreme does Kostroma's weather get?

The hottest, coldest, wettest and snowiest days Kostroma 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 Kostroma station 6 km away. Updated through March 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 Kostroma has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
99°F Jul 29, 2010

That is about 23°F hotter than a normal July afternoon in Kostroma (typical high near 76°F).

The three most extreme on record

1 99°F Jul 29, 2010
2 99°F Aug 9, 2010
3 98°F Jul 25, 2010
❄️ Coldest night
-48°F Dec 31, 1978

About 63°F colder than a normal December night in Kostroma (typical low near 15°F).

The three most extreme on record

1 -48°F Dec 31, 1978
2 -43°F Jan 9, 1987
3 -43°F Jan 10, 1987
🌧️ Most rain in one day
3.15 in Jun 28, 1997

More rain in a single day than Kostroma usually gets in the whole month of June (typical June total about 3.0 in).

The three most extreme on record

1 3.15 in Jun 28, 1997
2 2.22 in Aug 5, 1976
3 2.17 in Aug 26, 1986

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 99°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Kostroma's record heat sits well above even a hot day for the season — July's 99°F is about 23°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, Kostroma's warmest days reach the mid-70s°F and its coldest nights drop to the low 10s°F. But across the record it has gone as high as 99°F and as low as −48°F. A single day has delivered over 3 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 29 years of daily observations at Kostroma, a weather station, about 6 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →