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Weather extremes

How extreme does Hakodate's weather get?

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

Based on 34 years of daily weather observations (1991–present), from the Hakodate station 5 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 Hakodate has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
96°F Aug 10, 2023

That is about 17°F hotter than a normal August afternoon in Hakodate (typical high near 78°F).

The three most extreme on record

1 96°F Aug 10, 2023recent
2 92°F Aug 24, 2023
3 91°F Aug 14, 2007
❄️ Coldest night
4°F Feb 2, 1996

About 17°F colder than a normal February night in Hakodate (typical low near 21°F).

The three most extreme on record

1 4°F Feb 2, 1996
2 5°F Feb 1, 1996
3 6°F Jan 28, 2012
🌧️ Most rain in one day
5.51 in Jan 5, 2015

More rain in a single day than Hakodate usually gets in the whole month of January (typical January total about 3.2 in).

The three most extreme on record

1 5.51 in Jan 5, 2015
2 5.12 in Jan 25, 2015
3 4.72 in Jan 13, 2015

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.

-10°10°30°50°70°90°110° all-time high 96°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Hakodate's record heat sits well above even a hot day for the season — August's 96°F is about 17°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, Hakodate's warmest days reach the high 70s°F and its coldest nights drop to the low 20s°F. But across the record it has gone as high as 96°F and as low as 4°F. A single day has delivered over 6 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 — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Hakodate, about 5 km from the city centre.

How we build these numbers →