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Weather extremes

How extreme does Itō's weather get?

The hottest, coldest, wettest and snowiest days Itō 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 Ajiro station 9 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 Itō has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
99°F Aug 6, 2025

That is about 12°F hotter than a normal August afternoon in Itō (typical high near 87°F).

The three most extreme on record

1 99°F Aug 6, 2025recent
2 98°F Aug 6, 2015
3 98°F Sep 6, 2010
❄️ Coldest night
28°F Jan 22, 1997

About 10°F colder than a normal January night in Itō (typical low near 38°F).

The three most extreme on record

1 28°F Jan 22, 1997
2 28°F Jan 25, 2018
3 28°F Jan 21, 1997
🌧️ Most rain in one day
11.38 in Aug 15, 2003

More rain in a single day than Itō usually gets in the whole month of August (typical August total about 7.2 in).

The three most extreme on record

1 11.38 in Aug 15, 2003
2 10.43 in Jun 18, 2024
3 8.90 in Oct 12, 2019

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° all-time high 99°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Itō's record heat sits well above even a hot day for the season — August's 99°F is about 12°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, Itō's warmest days reach the high 80s°F and its coldest nights drop to the high 30s°F. But across the record it has gone as high as 99°F and as low as 28°F. A single day has delivered over 11 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 Ajiro, about 9 km from the city centre.

How we build these numbers →