The hottest, coldest, wettest and snowiest days Hämeenlinna 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 Hameenlinna Katinen station 2 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 Hämeenlinna
has recorded — each shown against what a normal day that time of year
looks like.
🔥Hottest day
92°FJul 28, 2010
The three most extreme on record
192°FJul 28, 2010
291°FJul 13, 2010
390°FAug 8, 2010
❄️Coldest night
-23°FFeb 18, 2011
The three most extreme on record
1-23°FFeb 18, 2011
2-22°FFeb 20, 2011
3-21°FFeb 19, 2011
🌧️Most rain in one day
1.69 inAug 28, 2023
The three most extreme on record
11.69 inAug 28, 2023recent
21.53 inAug 8, 2008
31.30 inJul 21, 2011
In plain terms
Across the record, Hämeenlinna has reached as high as 92°F and as low as −23°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 28 years of daily observations at Lahti Laune, a weather station, about 63 km from the city centre. The underlying daily records come from NOAA's global station network.