Tendō climate — normals and trends
Tendō (Japan) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 9.7 °C and it receives 1,417 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 (22.8 °C on average) and the coldest is January (-2.4 °C). Rainfall peaks in July.
Tendō averages 125 frost days, 9 hot days (≥ 30 °C) and 198 rainy days per year.
Tendō has warmed by +2.7 °C between 1940 and 2025, or +0.32 °C per decade. This trend is statistically significant.
The number of frost days there went from about 143 to 107 per year over the period.
The hottest day of the period reached 36.1 °C (on 23 August 2018) and the coldest -20.2 °C (on 4 December 1950).
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
TendōYamagata
- coords
- 38.35°, 140.37°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.7°C
Average daily high
13.7°C
Average daily low
5.9°C
Annual rainfall
1,417mm
Sunshine / day
7.9h
Mean relative humidity
81%
Average peak wind
12.9km/h
Seasonal range
25.2°C
Frost days (< 0 °C)
125 d/yr
Hot days (≥ 30 °C)
9 d/yr
Rainy days (≥ 1 mm)
198 d/yr
Annual snowfall
252.0 cm
Average feels-like high
12.5 °C
Average feels-like low
4.2 °C
Average peak gust
39.8 km/h
Tropical nights (≥ 20 °C)
27 d/yr
Solar radiation
13.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.7 °C
since 1940
+0.3 °C per decade · r² = 0.65 · 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
36.1 °C
23 August 2018
Coldest day
-20.2 °C
4 December 1950
Wettest day
120 mm
28 July 2020
Windiest day
49.6 km/h
14 December 2025
Strongest gust
133.2 km/h
23 August 1981
Hottest feels-like
40.3 °C
29 July 2025
Coldest feels-like
-24.9 °C
4 December 1950
Snowiest day
51.5 cm
24 December 1980
Sunniest day
14.3 h
19 June 2007
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 | 1.8 °C | +1.0 °C | 140 mm | +20 mm |
| Feb | 1.4 °C | -0.1 °C | 117 mm | +18 mm |
| Mar | 7.6 °C | +2.4 °C | 86 mm | -20 mm |
| Apr | 13.7 °C | +1.5 °C | 114 mm | +23 mm |
| May | 19.1 °C | +0.8 °C | 148 mm | +56 mm |
| Jun | 25.6 °C | +3.8 °C | 91 mm | -30 mm |
| Jul | 30.6 °C | +5.4 °C | 47 mm | -134 mm |
| Aug | 29.4 °C | +2.6 °C | 171 mm | +31 mm |
| Sep | 25.3 °C | +2.9 °C | 155 mm | +17 mm |
| Oct | 17.2 °C | +0.8 °C | 153 mm | +44 mm |
| Nov | 11.3 °C | +1.2 °C | 103 mm | +5 mm |
| Dec | 5.5 °C | +1.9 °C | 148 mm | +25 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 Tendō?
Tendō has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 9.7 °C and it receives 1,417 mm of precipitation per year.
What is the hottest day ever recorded in Tendō?
The hottest day measured in Tendō between 1940 and 2025 was 23 August 2018, reaching 36.1 °C.
What is the coldest day in Tendō?
The coldest day measured in Tendō between 1940 and 2025 was 4 December 1950, at -20.2 °C.
Does it snow in Tendō?
Yes. Tendō gets on average 252.0 cm of snow per year and has around 125 frost days.
Has the climate of Tendō warmed?
Yes: Tendō warmed by +2.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Tendō?
The wettest day measured in Tendō between 1940 and 2025 was 28 July 2020, with 120 mm of rain in 24 hours.
What was the windiest day in Tendō?
The windiest day measured in Tendō between 1940 and 2025 was 14 December 2025, with winds reaching 49.6 km/h.
What is the warmest month in Tendō?
The warmest month in Tendō is August (22.8 °C on average); the coldest is January (-2.4 °C).
How much does it rain in Tendō?
Tendō receives on average 1,417 mm of precipitation per year, spread over about 198 rainy days.
Is it sunny in Tendō?
Tendō gets on average 7.9 hours of sunshine per day, roughly 2,884 hours per year over 1940-2025.
What is the biggest single-day snowfall in Tendō?
The heaviest 24-hour snowfall measured in Tendō between 1940 and 2025 was 24 December 1980, with 51.5 cm.
Are there tropical nights in Tendō?
Yes: Tendō has on average 27 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Tendō?
In Tendō, between 1940 and 2025, the highest apparent temperature reached 40.3 °C on 29 July 2025, and the lowest was -24.9 °C on 4 December 1950.
Compare Tendō with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Tendō