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Weather extremes

How extreme does Hasaki's weather get?

The hottest, coldest, wettest and snowiest days Hasaki 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 Narita Intl station 41 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 Hasaki has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
102°F Jul 20, 2004

That is about 19°F hotter than a normal July afternoon in Hasaki (typical high near 83°F).

The three most extreme on record

1 102°F Jul 20, 2004
2 100°F Aug 3, 2022
3 99°F Aug 16, 2007
❄️ Coldest night
16°F Jan 15, 2003

About 14°F colder than a normal January night in Hasaki (typical low near 30°F).

The three most extreme on record

1 16°F Jan 15, 2003
2 18°F Jan 23, 1991
3 18°F Jan 30, 1994
🌧️ Most rain in one day
10.16 in Apr 7, 1994

The three most extreme on record

1 10.16 in Apr 7, 1994
2 1.34 in Apr 7, 1991
3 1.34 in May 10, 1991

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°130° all-time high 102°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Hasaki's record heat sits well above even a hot day for the season — July's 102°F is about 19°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, Hasaki's warmest days reach the mid-80s°F and its coldest nights drop to the low 30s°F. But across the record it has gone as high as 102°F and as low as 16°F. A single day has delivered over 10 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 Choshi, about 2 km from the city centre.

How we build these numbers →