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Weather extremes

How extreme does Setouchi's weather get?

The hottest, coldest, wettest and snowiest days Setouchi 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 Okayama station 21 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 Setouchi has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
103°F Aug 5, 2025

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

The three most extreme on record

1 103°F Aug 5, 2025recent
2 103°F Aug 7, 1994
3 101°F Aug 10, 1994
❄️ Coldest night
21°F Feb 6, 2018

About 13°F colder than a normal February night in Setouchi (typical low near 34°F).

The three most extreme on record

1 21°F Feb 6, 2018
2 21°F Feb 7, 2018
3 22°F Jan 8, 2021
🌧️ Most rain in one day
7.76 in Jul 7, 2018

More rain in a single day than Setouchi usually gets in the whole month of July (typical July total about 6.9 in).

The three most extreme on record

1 7.76 in Jul 7, 2018
2 5.57 in Jun 20, 2013
3 5.24 in Sep 4, 2011

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

Setouchi's record heat sits well above even a hot day for the season — August's 103°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, Setouchi'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 103°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 Okayama, about 20 km from the city centre.

How we build these numbers →