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Weather extremes

How extreme does Sendai's weather get?

The hottest, coldest, wettest and snowiest days Sendai 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 Akune station 26 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 Sendai has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
102°F Jul 11, 1993

That is about 16°F hotter than a normal July afternoon in Sendai (typical high near 86°F).

The three most extreme on record

1 102°F Jul 11, 1993
2 99°F Aug 13, 2018
3 98°F Aug 21, 2013
❄️ Coldest night
26°F Jan 25, 2016

About 13°F colder than a normal January night in Sendai (typical low near 39°F).

The three most extreme on record

1 26°F Jan 25, 2016
2 27°F Feb 3, 2012
3 27°F Jan 24, 2016
🌧️ Most rain in one day
9.80 in Jun 16, 2012

About 54% of a typical June's rain in a single day (Sendai averages roughly 18.2 in across the month).

The three most extreme on record

1 9.80 in Jun 16, 2012
2 9.53 in Aug 17, 2021
3 9.49 in Jul 6, 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 102°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Sendai's record heat sits well above even a hot day for the season — July's 102°F is about 16°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, Sendai'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 102°F and as low as 26°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 Sendai, about 2 km from the city centre.

How we build these numbers →