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Weather extremes

How extreme does Joensuu's weather get?

The hottest, coldest, wettest and snowiest days Joensuu 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 Liperi Joensuun Lentoasema station 10 km away. Updated through April 2026 — 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 Joensuu 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 28°F hotter than a normal July afternoon in Joensuu (typical high near 71°F).

The three most extreme on record

1 99°F Jul 29, 2010
2 91°F Jul 28, 2010
3 90°F Jul 8, 1972
❄️ Coldest night
-37°F Feb 15, 1978

About 47°F colder than a normal February night in Joensuu (typical low near 10°F).

The three most extreme on record

1 -37°F Feb 15, 1978
2 -37°F Feb 1, 1980
3 -37°F Jan 12, 1987
🌧️ Most rain in one day
2.60 in Aug 19, 1992

About 98% of a typical August's rain in a single day (Joensuu averages roughly 2.7 in across the month).

The three most extreme on record

1 2.60 in Aug 19, 1992
2 2.24 in Jul 4, 1988
3 1.89 in Jul 21, 1980

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

Joensuu's record heat sits well above even a hot day for the season — July'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, Joensuu's warmest days reach the low 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 −37°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 30 years of daily observations at Liperi Joensuun Lentoasema, a weather station, about 10 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →