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Weather extremes

How extreme does Itami's weather get?

The hottest, coldest, wettest and snowiest days Itami 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 Osaka Intl station 3 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 Itami has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
104°F Aug 8, 1994

That is about 12°F hotter than a normal August afternoon in Itami (typical high near 92°F).

The three most extreme on record

1 104°F Aug 8, 1994
2 102°F Aug 2, 2001
3 102°F Aug 12, 2013
❄️ Coldest night
21°F Jan 29, 2003

About 13°F colder than a normal January night in Itami (typical low near 35°F).

The three most extreme on record

1 21°F Jan 29, 2003
2 23°F Jan 21, 1997
3 23°F Jan 30, 2011
🌧️ Most rain in one day
10.04 in Oct 30, 1993

The three most extreme on record

1 10.04 in Oct 30, 1993
2 0.12 in May 27, 1999
3 0.04 in Aug 10, 1993

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 104°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Itami's record heat sits well above even a hot day for the season — August's 104°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, Itami's warmest days reach the low 90s°F and its coldest nights drop to the mid-30s°F. But across the record it has gone as high as 104°F and as low as 21°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 Toyonaka, about 3 km from the city centre.

How we build these numbers →