Tōno climate — normals and trends
Tōno (Japan) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 9.2 °C and it receives 1,311 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is August (22.2 °C on average) and the coldest is January (-3.4 °C). Rainfall peaks in September.
Tōno averages 125 frost days, 4 hot days (≥ 30 °C) and 152 rainy days per year.
Tōno has warmed by +3.0 °C between 1940 and 2025, or +0.35 °C per decade. This trend is statistically significant.
The number of frost days there went from about 144 to 107 per year over the period.
The hottest day of the period reached 33.6 °C (on 15 August 2007) and the coldest -23.7 °C (on 27 January 1985).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
TōnoIwate
- coords
- 39.32°, 141.53°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.2°C
Average daily high
13.1°C
Average daily low
5.3°C
Annual rainfall
1,311mm
Sunshine / day
8.4h
Mean relative humidity
77%
Average peak wind
15.4km/h
Seasonal range
25.6°C
Frost days (< 0 °C)
125 d/yr
Hot days (≥ 30 °C)
4 d/yr
Rainy days (≥ 1 mm)
152 d/yr
Annual snowfall
106.6 cm
Average feels-like high
11.5 °C
Average feels-like low
3.4 °C
Average peak gust
45.3 km/h
Tropical nights (≥ 20 °C)
24 d/yr
Solar radiation
13.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.0 °C
since 1940
+0.4 °C per decade · r² = 0.67 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
33.6 °C
15 August 2007
Coldest day
-23.7 °C
27 January 1985
Wettest day
186 mm
15 September 1947
Windiest day
50.0 km/h
31 March 1979
Strongest gust
149.0 km/h
23 August 1981
Hottest feels-like
39.4 °C
23 August 2018
Coldest feels-like
-28.3 °C
27 January 1985
Snowiest day
41.8 cm
18 January 2016
Sunniest day
14.7 h
13 June 1986
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 3.1 °C | +2.5 °C | 37 mm | -17 mm |
| Feb | 2.6 °C | +1.2 °C | 21 mm | -36 mm |
| Mar | 8.0 °C | +2.6 °C | 88 mm | -2 mm |
| Apr | 13.3 °C | +1.1 °C | 120 mm | +16 mm |
| May | 18.0 °C | +0.8 °C | 153 mm | +42 mm |
| Jun | 24.8 °C | +4.5 °C | 86 mm | -40 mm |
| Jul | 29.0 °C | +5.0 °C | 110 mm | -52 mm |
| Aug | 28.4 °C | +2.8 °C | 138 mm | -25 mm |
| Sep | 24.4 °C | +2.8 °C | 199 mm | +19 mm |
| Oct | 16.4 °C | +0.4 °C | 119 mm | -4 mm |
| Nov | 10.3 °C | +0.6 °C | 81 mm | +3 mm |
| Dec | 4.9 °C | +1.4 °C | 76 mm | +12 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Tōno?
Tōno has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 9.2 °C and it receives 1,311 mm of precipitation per year.
What is the hottest day ever recorded in Tōno?
The hottest day measured in Tōno between 1940 and 2025 was 15 August 2007, reaching 33.6 °C.
What is the coldest day in Tōno?
The coldest day measured in Tōno between 1940 and 2025 was 27 January 1985, at -23.7 °C.
Does it snow in Tōno?
Yes. Tōno gets on average 106.6 cm of snow per year and has around 125 frost days.
Has the climate of Tōno warmed?
Yes: Tōno warmed by +3.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Tōno?
The wettest day measured in Tōno between 1940 and 2025 was 15 September 1947, with 186 mm of rain in 24 hours.
What was the windiest day in Tōno?
The windiest day measured in Tōno between 1940 and 2025 was 31 March 1979, with winds reaching 50.0 km/h.
What is the warmest month in Tōno?
The warmest month in Tōno is August (22.2 °C on average); the coldest is January (-3.4 °C).
How much does it rain in Tōno?
Tōno receives on average 1,311 mm of precipitation per year, spread over about 152 rainy days.
Is it sunny in Tōno?
Tōno gets on average 8.4 hours of sunshine per day, roughly 3,066 hours per year over 1940-2025.
What is the biggest single-day snowfall in Tōno?
The heaviest 24-hour snowfall measured in Tōno between 1940 and 2025 was 18 January 2016, with 41.8 cm.
Are there tropical nights in Tōno?
Yes: Tōno has on average 24 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Tōno?
In Tōno, between 1940 and 2025, the highest apparent temperature reached 39.4 °C on 23 August 2018, and the lowest was -28.3 °C on 27 January 1985.
Compare Tōno with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Tōno