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Weather extremes

How extreme does Sado's weather get?

The hottest, coldest, wettest and snowiest days Sado 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 Aikawa station 11 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 Sado has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
101°F Aug 9, 2023

That is about 17°F hotter than a normal August afternoon in Sado (typical high near 85°F).

The three most extreme on record

1 101°F Aug 9, 2023recent
2 101°F Aug 15, 2019
3 100°F Aug 23, 2018
❄️ Coldest night
21°F Jan 25, 2023

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

The three most extreme on record

1 21°F Jan 25, 2023recent
2 22°F Jan 24, 2023
3 23°F Feb 2, 1996
🌧️ Most rain in one day
9.45 in Jul 15, 2002

More rain in a single day than Sado usually gets in the whole month of July (typical July total about 8.4 in).

The three most extreme on record

1 9.45 in Jul 15, 2002
2 5.31 in Jul 15, 2012
3 5.15 in Sep 11, 2012

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

Sado's record heat sits well above even a hot day for the season — August's 101°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, Sado's warmest days reach the mid-80s°F and its coldest nights drop to the low 30s°F. But across the record it has gone as high as 101°F and as low as 21°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 Ryotsu, about 9 km from the city centre.

How we build these numbers →