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Weather extremes

How extreme does Saint Petersburg's weather get?

The hottest, coldest, wettest and snowiest days Saint Petersburg 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 St. Petersburg station 3 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 Saint Petersburg has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
99°F Aug 7, 2010

That is about 28°F hotter than a normal August afternoon in Saint Petersburg (typical high near 71°F).

The three most extreme on record

1 99°F Aug 7, 2010
2 97°F Jun 23, 2021
3 96°F Jul 28, 2010
❄️ Coldest night
-30°F Dec 30, 1978

About 53°F colder than a normal December night in Saint Petersburg (typical low near 23°F).

The three most extreme on record

1 -30°F Dec 30, 1978
2 -30°F Jan 10, 1987
3 -30°F Jan 12, 1987
🌧️ Most rain in one day
2.72 in Jul 16, 2002

About 83% of a typical July's rain in a single day (Saint Petersburg averages roughly 3.3 in across the month).

The three most extreme on record

1 2.72 in Jul 16, 2002
2 2.30 in Jul 6, 2000
3 2.28 in Aug 7, 1987

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.

-50°-30°-10°10°30°50°70°90°110° all-time high 99°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Saint Petersburg's record heat sits well above even a hot day for the season — August's 99°F is about 28°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, Saint Petersburg's warmest days reach the mid-70s°F and its coldest nights drop to the high 10s°F. But across the record it has gone as high as 99°F and as low as −30°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 St. Petersburg, a weather station, about 3 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →