Toyoshina climate — normals and trends
Toyoshina (Japan) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 9.1 °C and it receives 1,951 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 (22.0 °C on average) and the coldest is January (-4.2 °C). Rainfall peaks in July.
Toyoshina averages 134 frost days, 4 hot days (≥ 30 °C) and 191 rainy days per year.
Toyoshina has warmed by +3.2 °C between 1940 and 2025, or +0.37 °C per decade. This trend is statistically significant.
The number of frost days there went from about 152 to 116 per year over the period.
The hottest day of the period reached 33.6 °C (on 5 August 2018) and the coldest -21.9 °C (on 20 January 1942).
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
ToyoshinaNagano
- coords
- 36.30°, 137.90°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.1°C
Average daily high
13.9°C
Average daily low
4.6°C
Annual rainfall
1,951mm
Sunshine / day
8.8h
Mean relative humidity
73%
Average peak wind
9.4km/h
Seasonal range
26.2°C
Frost days (< 0 °C)
134 d/yr
Hot days (≥ 30 °C)
4 d/yr
Rainy days (≥ 1 mm)
191 d/yr
Annual snowfall
210.8 cm
Average feels-like high
12.8 °C
Average feels-like low
2.6 °C
Average peak gust
32.1 km/h
Tropical nights (≥ 20 °C)
8 d/yr
Solar radiation
15.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.2 °C
since 1940
+0.4 °C per decade · r² = 0.69 · 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
5 August 2018
Coldest day
-21.9 °C
20 January 1942
Wettest day
143 mm
14 August 2021
Windiest day
42.7 km/h
16 September 1961
Strongest gust
169.2 km/h
27 September 1959
Hottest feels-like
38.0 °C
15 July 2018
Coldest feels-like
-27.1 °C
20 January 1942
Snowiest day
39.4 cm
15 February 2014
Sunniest day
14.0 h
13 June 1940
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 | 2.8 °C | +2.1 °C | 87 mm | -8 mm |
| Feb | 2.8 °C | +0.9 °C | 81 mm | -17 mm |
| Mar | 9.3 °C | +3.2 °C | 156 mm | +18 mm |
| Apr | 15.1 °C | +1.9 °C | 119 mm | -22 mm |
| May | 19.8 °C | +1.2 °C | 164 mm | +2 mm |
| Jun | 24.6 °C | +2.9 °C | 201 mm | -51 mm |
| Jul | 29.3 °C | +4.0 °C | 120 mm | -150 mm |
| Aug | 29.5 °C | +3.0 °C | 123 mm | -55 mm |
| Sep | 25.6 °C | +3.2 °C | 169 mm | -57 mm |
| Oct | 17.5 °C | +1.1 °C | 224 mm | +46 mm |
| Nov | 11.1 °C | +0.5 °C | 71 mm | -42 mm |
| Dec | 5.7 °C | +1.9 °C | 122 mm | +23 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 Toyoshina?
Toyoshina has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 9.1 °C and it receives 1,951 mm of precipitation per year.
What is the hottest day ever recorded in Toyoshina?
The hottest day measured in Toyoshina between 1940 and 2025 was 5 August 2018, reaching 33.6 °C.
What is the coldest day in Toyoshina?
The coldest day measured in Toyoshina between 1940 and 2025 was 20 January 1942, at -21.9 °C.
Does it snow in Toyoshina?
Yes. Toyoshina gets on average 210.8 cm of snow per year and has around 134 frost days.
Has the climate of Toyoshina warmed?
Yes: Toyoshina warmed by +3.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Toyoshina?
The wettest day measured in Toyoshina between 1940 and 2025 was 14 August 2021, with 143 mm of rain in 24 hours.
What was the windiest day in Toyoshina?
The windiest day measured in Toyoshina between 1940 and 2025 was 16 September 1961, with winds reaching 42.7 km/h.
What is the warmest month in Toyoshina?
The warmest month in Toyoshina is August (22.0 °C on average); the coldest is January (-4.2 °C).
How much does it rain in Toyoshina?
Toyoshina receives on average 1,951 mm of precipitation per year, spread over about 191 rainy days.
Is it sunny in Toyoshina?
Toyoshina gets on average 8.8 hours of sunshine per day, roughly 3,212 hours per year over 1940-2025.
What is the biggest single-day snowfall in Toyoshina?
The heaviest 24-hour snowfall measured in Toyoshina between 1940 and 2025 was 15 February 2014, with 39.4 cm.
Are there tropical nights in Toyoshina?
Yes: Toyoshina has on average 8 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Toyoshina?
In Toyoshina, between 1940 and 2025, the highest apparent temperature reached 38.0 °C on 15 July 2018, and the lowest was -27.1 °C on 20 January 1942.
Compare Toyoshina with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Toyoshina