Hanawa climate — normals and trends
Hanawa (Japan) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.2 °C and it receives 1,431 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 (21.7 °C on average) and the coldest is January (-4.5 °C). Rainfall peaks in July.
Hanawa averages 139 frost days, 3 hot days (≥ 30 °C) and 193 rainy days per year.
Hanawa has warmed by +2.5 °C between 1940 and 2025, or +0.30 °C per decade. This trend is statistically significant.
The number of frost days there went from about 156 to 122 per year over the period.
The hottest day of the period reached 34.0 °C (on 10 August 1999) and the coldest -22.5 °C (on 7 January 1941).
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
HanawaAkita
- coords
- 40.18°, 140.79°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.2°C
Average daily high
12.1°C
Average daily low
4.4°C
Annual rainfall
1,431mm
Sunshine / day
7.8h
Mean relative humidity
81%
Average peak wind
15.0km/h
Seasonal range
26.2°C
Frost days (< 0 °C)
139 d/yr
Hot days (≥ 30 °C)
3 d/yr
Rainy days (≥ 1 mm)
193 d/yr
Annual snowfall
248.5 cm
Average feels-like high
10.3 °C
Average feels-like low
2.2 °C
Average peak gust
43.8 km/h
Tropical nights (≥ 20 °C)
17 d/yr
Solar radiation
13.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.5 °C
since 1940
+0.3 °C per decade · r² = 0.62 · 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
34.0 °C
10 August 1999
Coldest day
-22.5 °C
7 January 1941
Wettest day
120 mm
7 July 1975
Windiest day
48.0 km/h
28 September 1991
Strongest gust
147.2 km/h
28 September 1991
Hottest feels-like
39.2 °C
23 August 2023
Coldest feels-like
-26.8 °C
7 January 1941
Snowiest day
50.8 cm
29 March 1966
Sunniest day
14.8 h
22 June 1958
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 | 0.9 °C | +2.3 °C | 83 mm | -6 mm |
| Feb | 0.2 °C | +0.7 °C | 71 mm | -10 mm |
| Mar | 4.7 °C | +1.2 °C | 120 mm | +13 mm |
| Apr | 12.1 °C | +1.5 °C | 150 mm | +46 mm |
| May | 17.5 °C | +0.6 °C | 128 mm | +25 mm |
| Jun | 23.7 °C | +3.1 °C | 87 mm | -32 mm |
| Jul | 29.0 °C | +5.0 °C | 48 mm | -124 mm |
| Aug | 27.8 °C | +2.3 °C | 140 mm | -24 mm |
| Sep | 23.8 °C | +2.6 °C | 154 mm | -4 mm |
| Oct | 15.4 °C | +0.4 °C | 84 mm | -34 mm |
| Nov | 8.5 °C | +0.6 °C | 161 mm | +53 mm |
| Dec | 2.6 °C | +1.2 °C | 157 mm | +49 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 Hanawa?
Hanawa has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 8.2 °C and it receives 1,431 mm of precipitation per year.
What is the hottest day ever recorded in Hanawa?
The hottest day measured in Hanawa between 1940 and 2025 was 10 August 1999, reaching 34.0 °C.
What is the coldest day in Hanawa?
The coldest day measured in Hanawa between 1940 and 2025 was 7 January 1941, at -22.5 °C.
Does it snow in Hanawa?
Yes. Hanawa gets on average 248.5 cm of snow per year and has around 139 frost days.
Has the climate of Hanawa warmed?
Yes: Hanawa warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Hanawa?
The wettest day measured in Hanawa between 1940 and 2025 was 7 July 1975, with 120 mm of rain in 24 hours.
What was the windiest day in Hanawa?
The windiest day measured in Hanawa between 1940 and 2025 was 28 September 1991, with winds reaching 48.0 km/h.
What is the warmest month in Hanawa?
The warmest month in Hanawa is August (21.7 °C on average); the coldest is January (-4.5 °C).
How much does it rain in Hanawa?
Hanawa receives on average 1,431 mm of precipitation per year, spread over about 193 rainy days.
Is it sunny in Hanawa?
Hanawa gets on average 7.8 hours of sunshine per day, roughly 2,847 hours per year over 1940-2025.
What is the biggest single-day snowfall in Hanawa?
The heaviest 24-hour snowfall measured in Hanawa between 1940 and 2025 was 29 March 1966, with 50.8 cm.
Are there tropical nights in Hanawa?
Yes: Hanawa has on average 17 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Hanawa?
In Hanawa, between 1940 and 2025, the highest apparent temperature reached 39.2 °C on 23 August 2023, and the lowest was -26.8 °C on 7 January 1941.
Compare Hanawa with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Hanawa