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Weather extremes

How extreme does Chichibu's weather get?

The hottest, coldest, wettest and snowiest days Chichibu 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 Chichibu station 1 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 Chichibu has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
103°F Aug 7, 1994

That is about 15°F hotter than a normal August afternoon in Chichibu (typical high near 88°F).

The three most extreme on record

1 103°F Aug 7, 1994
2 103°F Jul 23, 2018
3 102°F Jul 6, 1997
❄️ Coldest night
14°F Jan 16, 2001

About 10°F colder than a normal January night in Chichibu (typical low near 24°F).

The three most extreme on record

1 14°F Jan 16, 2001
2 14°F Jan 26, 2023
3 14°F Jan 15, 2001
🌧️ Most rain in one day
8.51 in Oct 6, 2006

More rain in a single day than Chichibu usually gets in the whole month of October (typical October total about 7.5 in).

The three most extreme on record

1 8.51 in Oct 6, 2006
2 8.46 in Aug 22, 2016
3 8.42 in Jul 26, 2005

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 103°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Chichibu's record heat sits well above even a hot day for the season — August's 103°F is about 15°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, Chichibu's warmest days reach the high 80s°F and its coldest nights drop to the mid-20s°F. But across the record it has gone as high as 103°F and as low as 14°F. A single day has delivered over 9 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 Chichibu, inside the city.

How we build these numbers →