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Weather extremes

How extreme does Tome's weather get?

The hottest, coldest, wettest and snowiest days Tome 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 Ishinomaki station 33 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 Tome has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
98°F Aug 15, 2007

That is about 17°F hotter than a normal August afternoon in Tome (typical high near 81°F).

The three most extreme on record

1 98°F Aug 15, 2007
2 97°F Aug 1, 2018
3 97°F Aug 28, 2023
❄️ Coldest night
12°F Jan 9, 2021

About 15°F colder than a normal January night in Tome (typical low near 27°F).

The three most extreme on record

1 12°F Jan 9, 2021recent
2 13°F Jan 8, 2021
3 15°F Jan 15, 2001
🌧️ Most rain in one day
7.40 in Sep 21, 2011

More rain in a single day than Tome usually gets in the whole month of September (typical September total about 6.0 in).

The three most extreme on record

1 7.40 in Sep 21, 2011
2 6.57 in Oct 13, 2019
3 6.26 in Sep 11, 2014

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°10°30°50°70°90°110° all-time high 98°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Tome's record heat sits well above even a hot day for the season — August's 98°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, Tome's warmest days reach the low 80s°F and its coldest nights drop to the high 20s°F. But across the record it has gone as high as 98°F and as low as 12°F. A single day has delivered over 7 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 Mono, about 18 km from the city centre.

How we build these numbers →