Nasu climate — normals and trends
Nasu (Japan) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 11.1 °C and it receives 1,682 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 (23.2 °C on average) and the coldest is January (-0.4 °C). Rainfall peaks in September.
Nasu averages 101 frost days, 11 hot days (≥ 30 °C) and 170 rainy days per year.
Nasu has warmed by +2.6 °C between 1940 and 2025, or +0.31 °C per decade. This trend is statistically significant.
The number of frost days there went from about 122 to 80 per year over the period.
The hottest day of the period reached 34.6 °C (on 1 August 2018) and the coldest -17.6 °C (on 27 January 1940).
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
NasuTochigi
- coords
- 37.04°, 140.09°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
11.1°C
Average daily high
15.4°C
Average daily low
7.3°C
Annual rainfall
1,682mm
Sunshine / day
8.1h
Mean relative humidity
76%
Average peak wind
12.7km/h
Seasonal range
23.6°C
Frost days (< 0 °C)
101 d/yr
Hot days (≥ 30 °C)
11 d/yr
Rainy days (≥ 1 mm)
170 d/yr
Annual snowfall
75.8 cm
Average feels-like high
14.5 °C
Average feels-like low
5.8 °C
Average peak gust
37.4 km/h
Tropical nights (≥ 20 °C)
35 d/yr
Solar radiation
13.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.6 °C
since 1940
+0.3 °C per decade · r² = 0.68 · 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
34.6 °C
1 August 2018
Coldest day
-17.6 °C
27 January 1940
Wettest day
210 mm
12 October 2019
Windiest day
48.0 km/h
16 September 1961
Strongest gust
186.1 km/h
27 September 1959
Hottest feels-like
40.9 °C
15 August 1994
Coldest feels-like
-22.5 °C
27 January 1940
Snowiest day
51.4 cm
15 February 2014
Sunniest day
14.1 h
13 June 1952
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 | 5.9 °C | +2.0 °C | 46 mm | -5 mm |
| Feb | 4.6 °C | 0.0 °C | 20 mm | -38 mm |
| Mar | 10.5 °C | +2.2 °C | 112 mm | +9 mm |
| Apr | 15.9 °C | +1.3 °C | 132 mm | +5 mm |
| May | 19.6 °C | +0.3 °C | 209 mm | +61 mm |
| Jun | 25.6 °C | +3.4 °C | 172 mm | -27 mm |
| Jul | 29.4 °C | +3.5 °C | 163 mm | -74 mm |
| Aug | 29.6 °C | +2.4 °C | 172 mm | -44 mm |
| Sep | 26.0 °C | +3.0 °C | 169 mm | -69 mm |
| Oct | 18.0 °C | +0.6 °C | 159 mm | -4 mm |
| Nov | 13.2 °C | +1.1 °C | 54 mm | -31 mm |
| Dec | 8.0 °C | +1.2 °C | 65 mm | +8 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 Nasu?
Nasu has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 11.1 °C and it receives 1,682 mm of precipitation per year.
What is the hottest day ever recorded in Nasu?
The hottest day measured in Nasu between 1940 and 2025 was 1 August 2018, reaching 34.6 °C.
What is the coldest day in Nasu?
The coldest day measured in Nasu between 1940 and 2025 was 27 January 1940, at -17.6 °C.
Does it snow in Nasu?
Yes. Nasu gets on average 75.8 cm of snow per year and has around 101 frost days.
Has the climate of Nasu warmed?
Yes: Nasu warmed by +2.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Nasu?
The wettest day measured in Nasu between 1940 and 2025 was 12 October 2019, with 210 mm of rain in 24 hours.
What was the windiest day in Nasu?
The windiest day measured in Nasu between 1940 and 2025 was 16 September 1961, with winds reaching 48.0 km/h.
What is the warmest month in Nasu?
The warmest month in Nasu is August (23.2 °C on average); the coldest is January (-0.4 °C).
How much does it rain in Nasu?
Nasu receives on average 1,682 mm of precipitation per year, spread over about 170 rainy days.
Is it sunny in Nasu?
Nasu gets on average 8.1 hours of sunshine per day, roughly 2,957 hours per year over 1940-2025.
What is the biggest single-day snowfall in Nasu?
The heaviest 24-hour snowfall measured in Nasu between 1940 and 2025 was 15 February 2014, with 51.4 cm.
Are there tropical nights in Nasu?
Yes: Nasu has on average 35 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Nasu?
In Nasu, between 1940 and 2025, the highest apparent temperature reached 40.9 °C on 15 August 1994, and the lowest was -22.5 °C on 27 January 1940.
Compare Nasu with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Nasu