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Weather extremes

How extreme does Vaasa's weather get?

The hottest, coldest, wettest and snowiest days Vaasa 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 Seinajoki Pelmaa station 48 km away. Updated through June 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 Vaasa has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
92°F Jul 29, 2010

That is about 20°F hotter than a normal July afternoon in Vaasa (typical high near 72°F).

The three most extreme on record

1 92°F Jul 29, 2010
2 91°F Jul 13, 2010
3 91°F Jun 25, 2020
❄️ Coldest night
-41°F Jan 29, 1999

About 56°F colder than a normal January night in Vaasa (typical low near 15°F).

The three most extreme on record

1 -41°F Jan 29, 1999
2 -40°F Jan 10, 1987
3 -38°F Jan 28, 1999
🌧️ Most rain in one day
3.58 in Aug 5, 2022

More rain in a single day than Vaasa usually gets in the whole month of August (typical August total about 2.9 in).

The three most extreme on record

1 3.58 in Aug 5, 2022recent
2 2.03 in Aug 14, 2016
3 1.72 in Aug 14, 1971

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 92°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Vaasa's record heat sits well above even a hot day for the season — July's 92°F is about 20°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, Vaasa's warmest days reach the low 70s°F and its coldest nights drop to the mid-10s°F. But across the record it has gone as high as 92°F and as low as −41°F. A single day has delivered over 4 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 Seinajoki Pelmaa, a weather station, about 48 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →