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Weather extremes

How extreme does Aomori's weather get?

The hottest, coldest, wettest and snowiest days Aomori 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 Aomori station 3 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 Aomori has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
98°F Aug 12, 1994

That is about 16°F hotter than a normal August afternoon in Aomori (typical high near 82°F).

The three most extreme on record

1 98°F Aug 12, 1994
2 98°F Aug 10, 1999
3 98°F Aug 6, 2010
❄️ Coldest night
12°F Feb 20, 1991

About 13°F colder than a normal February night in Aomori (typical low near 25°F).

The three most extreme on record

1 12°F Feb 20, 1991
2 12°F Jan 18, 2014
3 13°F Feb 2, 2018
🌧️ Most rain in one day
5.55 in Oct 28, 1999

More rain in a single day than Aomori usually gets in the whole month of October (typical October total about 4.8 in).

The three most extreme on record

1 5.55 in Oct 28, 1999
2 5.28 in Jul 25, 2000
3 5.16 in May 26, 1994

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 98°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Aomori's record heat sits well above even a hot day for the season — August's 98°F is about 16°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, Aomori's warmest days reach the low 80s°F and its coldest nights drop to the mid-20s°F. But across the record it has gone as high as 98°F and as low as 12°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 Aomori, about 3 km from the city centre.

How we build these numbers →