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Weather extremes

How extreme does Pori's weather get?

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

Based on 17 years of daily weather observations (2008–present), from the Pori Rautatieasema station. Updated through June 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 Pori has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
92°F Jul 13, 2010

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

The three most extreme on record

1 92°F Jul 13, 2010
2 92°F Jul 29, 2010
3 92°F Jul 18, 2018
❄️ Coldest night
-17°F Dec 24, 2010

About 42°F colder than a normal December night in Pori (typical low near 25°F).

The three most extreme on record

1 -17°F Dec 24, 2010
2 -16°F Jan 7, 2016
3 -15°F Dec 23, 2010
🌧️ Most rain in one day
1.60 in Jul 2, 2011

About 61% of a typical July's rain in a single day (Pori averages roughly 2.6 in across the month).

The three most extreme on record

1 1.60 in Jul 2, 2011
2 1.51 in Aug 16, 2011
3 1.48 in Sep 13, 2011

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.

-30°-10°10°30°50°70°90°110° all-time high 92°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Pori'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, Pori's warmest days reach the low 70s°F and its coldest nights drop to the high 10s°F. But across the record it has gone as high as 92°F and as low as −17°F. A single day has delivered over 2 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 12 years of daily observations at Pori Rautatieasema, a weather station, inside the city. The underlying daily records come from NOAA's global station network.

How we build these numbers →