Hadano climate — normals and trends
Hadano (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 15.1 °C and it receives 2,040 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 (25.1 °C on average) and the coldest is January (5.8 °C). Rainfall peaks in October.
Hadano averages 5 frost days, 1 hot days (≥ 30 °C) and 174 rainy days per year.
Hadano has warmed by +1.6 °C between 1940 and 2025, or +0.19 °C per decade. This trend is statistically significant.
The number of frost days there went from about 10 to 0 per year over the period.
The hottest day of the period reached 31.6 °C (on 6 August 2025) and the coldest -5.6 °C (on 14 February 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
HadanoKanagawa
- coords
- 35.37°, 139.22°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.1°C
Average daily high
17.1°C
Average daily low
13.2°C
Annual rainfall
2,040mm
Sunshine / day
8.3h
Mean relative humidity
77%
Average peak wind
20.4km/h
Seasonal range
19.3°C
Frost days (< 0 °C)
5 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
174 d/yr
Annual snowfall
23.9 cm
Average feels-like high
16.7 °C
Average feels-like low
11.8 °C
Average peak gust
34.3 km/h
Tropical nights (≥ 20 °C)
86 d/yr
Solar radiation
13.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.6 °C
since 1940
+0.2 °C per decade · r² = 0.54 · 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
31.6 °C
6 August 2025
Coldest day
-5.6 °C
14 February 1942
Wettest day
224 mm
26 September 1958
Windiest day
78.9 km/h
1 October 2018
Strongest gust
162.4 km/h
1 October 2018
Hottest feels-like
38.6 °C
17 August 2024
Coldest feels-like
-12.1 °C
27 February 1981
Snowiest day
32.6 cm
15 February 1968
Sunniest day
14.0 h
23 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 | 9.5 °C | +1.3 °C | 58 mm | -26 mm |
| Feb | 9.2 °C | +0.9 °C | 29 mm | -79 mm |
| Mar | 12.9 °C | +1.8 °C | 230 mm | +56 mm |
| Apr | 16.4 °C | +1.1 °C | 151 mm | -25 mm |
| May | 19.5 °C | +0.7 °C | 251 mm | +62 mm |
| Jun | 24.4 °C | +2.7 °C | 157 mm | -77 mm |
| Jul | 27.9 °C | +2.8 °C | 84 mm | -105 mm |
| Aug | 28.9 °C | +2.2 °C | 43 mm | -127 mm |
| Sep | 26.6 °C | +2.5 °C | 153 mm | -86 mm |
| Oct | 20.3 °C | +0.8 °C | 213 mm | -31 mm |
| Nov | 15.5 °C | +0.3 °C | 48 mm | -97 mm |
| Dec | 12.2 °C | +1.4 °C | 94 mm | +7 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 Hadano?
Hadano has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 15.1 °C and it receives 2,040 mm of precipitation per year.
What is the hottest day ever recorded in Hadano?
The hottest day measured in Hadano between 1940 and 2025 was 6 August 2025, reaching 31.6 °C.
What is the coldest day in Hadano?
The coldest day measured in Hadano between 1940 and 2025 was 14 February 1942, at -5.6 °C.
Does it snow in Hadano?
Yes. Hadano gets on average 23.9 cm of snow per year and has around 5 frost days.
Has the climate of Hadano warmed?
Yes: Hadano warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Hadano?
The wettest day measured in Hadano between 1940 and 2025 was 26 September 1958, with 224 mm of rain in 24 hours.
What was the windiest day in Hadano?
The windiest day measured in Hadano between 1940 and 2025 was 1 October 2018, with winds reaching 78.9 km/h.
What is the warmest month in Hadano?
The warmest month in Hadano is August (25.1 °C on average); the coldest is January (5.8 °C).
How much does it rain in Hadano?
Hadano receives on average 2,040 mm of precipitation per year, spread over about 174 rainy days.
Is it sunny in Hadano?
Hadano gets on average 8.3 hours of sunshine per day, roughly 3,030 hours per year over 1940-2025.
What is the biggest single-day snowfall in Hadano?
The heaviest 24-hour snowfall measured in Hadano between 1940 and 2025 was 15 February 1968, with 32.6 cm.
Are there tropical nights in Hadano?
Yes: Hadano has on average 86 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Hadano?
In Hadano, between 1940 and 2025, the highest apparent temperature reached 38.6 °C on 17 August 2024, and the lowest was -12.1 °C on 27 February 1981.
Compare Hadano with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Hadano