How extreme does Omitama's weather get?

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

🔥 Hottest day

100°F Aug 15, 1996

That is about 15°F hotter than a normal August afternoon in Omitama (typical high near 85°F).

The three most extreme on record

1 100°F Aug 15, 1996

2 99°F Oct 1, 2002

3 99°F Jun 27, 2022

❄️ Coldest night

12°F Jan 5, 2006

About 14°F colder than a normal January night in Omitama (typical low near 26°F).

The three most extreme on record

1 12°F Jan 5, 2006

2 14°F Jan 30, 1994

3 14°F Jan 17, 1995

🌧️ Most rain in one day

10.47 in Apr 12, 1994

The three most extreme on record

1 10.47 in Apr 12, 1994

2 10.35 in Apr 7, 1994

3 10.31 in Jul 3, 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.

normal range of daily temperatureshottest ever recordedcoldest ever recorded

Omitama's record heat sits well above even a hot day for the season — August's 100°F is about 15°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, Omitama's warmest days reach the mid-80s°F and its coldest nights drop to the mid-20s°F. But across the record it has gone as high as 100°F and as low as 12°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 Mito, about 16 km from the city centre.

How we build these numbers →

← Omitama city detail