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Weather extremes

How extreme does Chiba's weather get?

The hottest, coldest, wettest and snowiest days Chiba 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 Chiba station 2 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 Chiba has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
101°F Aug 7, 2015

That is about 13°F hotter than a normal August afternoon in Chiba (typical high near 88°F).

The three most extreme on record

1 101°F Aug 7, 2015
2 101°F Aug 11, 2013
3 100°F Jul 20, 2004
❄️ Coldest night
27°F Jan 15, 2001

About 8°F colder than a normal January night in Chiba (typical low near 35°F).

The three most extreme on record

1 27°F Jan 15, 2001
2 27°F Jan 14, 2001
3 28°F Jan 21, 1997
🌧️ Most rain in one day
10.24 in Sep 22, 1996

More rain in a single day than Chiba usually gets in the whole month of September (typical September total about 8.2 in).

The three most extreme on record

1 10.24 in Sep 22, 1996
2 8.31 in Sep 8, 2023
3 7.32 in Sep 19, 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°30°50°70°90°110°130° all-time high 101°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Chiba's record heat sits well above even a hot day for the season — August's 101°F is about 13°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, Chiba's warmest days reach the high 80s°F and its coldest nights drop to the mid-30s°F. But across the record it has gone as high as 101°F and as low as 27°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 Chiba, about 1 km from the city centre.

How we build these numbers →