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Weather extremes

How extreme does Hachinohe's weather get?

The hottest, coldest, wettest and snowiest days Hachinohe 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 Hachinohe station 4 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 Hachinohe has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
98°F Aug 6, 2010

That is about 18°F hotter than a normal August afternoon in Hachinohe (typical high near 80°F).

The three most extreme on record

1 98°F Aug 6, 2010
2 98°F Aug 10, 2023
3 98°F Aug 9, 2023
❄️ Coldest night
11°F Jan 10, 2021

About 13°F colder than a normal January night in Hachinohe (typical low near 24°F).

The three most extreme on record

1 11°F Jan 10, 2021recent
2 11°F Jan 9, 2021
3 12°F Jan 27, 2000
🌧️ Most rain in one day
5.39 in Jun 24, 2008

More rain in a single day than Hachinohe usually gets in the whole month of June (typical June total about 4.2 in).

The three most extreme on record

1 5.39 in Jun 24, 2008
2 5.39 in Oct 13, 2019
3 5.28 in Aug 3, 2022

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

Hachinohe's record heat sits well above even a hot day for the season — August's 98°F is about 18°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, Hachinohe'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 11°F. A single day has delivered over 5 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 Hachinohe, about 3 km from the city centre.

How we build these numbers →