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Weather extremes

How extreme does Chitose's weather get?

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

🔥 Hottest day
93°F Aug 10, 1999

That is about 17°F hotter than a normal August afternoon in Chitose (typical high near 76°F).

The three most extreme on record

1 93°F Aug 10, 1999
2 93°F Aug 14, 2007
3 93°F Aug 15, 2007
❄️ Coldest night
-15°F Feb 1, 1996

About 27°F colder than a normal February night in Chitose (typical low near 12°F).

The three most extreme on record

1 -15°F Feb 1, 1996
2 -13°F Jan 13, 2001
3 -11°F Jan 23, 1996
🌧️ Most rain in one day
10.16 in Sep 15, 1993

The three most extreme on record

1 10.16 in Sep 15, 1993
2 10.16 in Oct 9, 1993
3 0.94 in May 14, 1992

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.

-30°-10°10°30°50°70°90°110° all-time high 93°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Chitose's record heat sits well above even a hot day for the season — August's 93°F is about 17°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, Chitose's warmest days reach the mid-70s°F and its coldest nights drop to the low 10s°F. But across the record it has gone as high as 93°F and as low as −15°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 Chitose, about 6 km from the city centre.

How we build these numbers →