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Weather extremes

How extreme does Niseko's weather get?

The hottest, coldest, wettest and snowiest days Niseko 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 Otaru station 50 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 Niseko has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
97°F Jul 28, 2021

That is about 22°F hotter than a normal July afternoon in Niseko (typical high near 75°F).

The three most extreme on record

1 97°F Jul 28, 2021recent
2 95°F Aug 1, 2000
3 95°F Aug 31, 2023
❄️ Coldest night
5°F Feb 7, 1998

About 16°F colder than a normal February night in Niseko (typical low near 21°F).

The three most extreme on record

1 5°F Feb 7, 1998
2 5°F Jan 15, 2003
3 5°F Feb 6, 1998
🌧️ Most rain in one day
4.21 in Aug 8, 2010

About 78% of a typical August's rain in a single day (Niseko averages roughly 5.4 in across the month).

The three most extreme on record

1 4.21 in Aug 8, 2010
2 4.02 in Aug 5, 1997
3 3.58 in Sep 2, 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 97°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Niseko's record heat sits well above even a hot day for the season — July's 97°F is about 22°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, Niseko'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 97°F and as low as 5°F. A single day has delivered over 4 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 Kyowa, about 20 km from the city centre.

How we build these numbers →