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Weather extremes

How extreme does Hashima's weather get?

The hottest, coldest, wettest and snowiest days Hashima 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 Gifu station 11 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 Hashima has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
104°F Aug 16, 2007

That is about 11°F hotter than a normal August afternoon in Hashima (typical high near 92°F).

The three most extreme on record

1 104°F Aug 16, 2007
2 104°F Aug 7, 1994
3 104°F Aug 1, 2001
❄️ Coldest night
21°F Feb 4, 1999

About 12°F colder than a normal February night in Hashima (typical low near 33°F).

The three most extreme on record

1 21°F Feb 4, 1999
2 22°F Jan 21, 1997
3 22°F Jan 22, 1997
🌧️ Most rain in one day
7.68 in Sep 11, 2000

About 85% of a typical September's rain in a single day (Hashima averages roughly 9.1 in across the month).

The three most extreme on record

1 7.68 in Sep 11, 2000
2 7.09 in Jul 28, 1997
3 6.54 in Jul 17, 2025

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°30°50°70°90°110°130° all-time high 104°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Hashima's record heat sits well above even a hot day for the season — August's 104°F is about 11°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, Hashima's warmest days reach the low 90s°F and its coldest nights drop to the low 30s°F. But across the record it has gone as high as 104°F and as low as 21°F. A single day has delivered over 8 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 Ogaki, about 6 km from the city centre.

How we build these numbers →