Hakurōmachi climate — normals and trends
Hakurōmachi (Japan) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 9.4 °C and it receives 1,150 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 (22.7 °C on average) and the coldest is January (-3.6 °C). Rainfall peaks in August.
Hakurōmachi averages 127 frost days, 9 hot days (≥ 30 °C) and 149 rainy days per year.
Hakurōmachi has warmed by +2.5 °C between 1940 and 2025, or +0.29 °C per decade. This trend is statistically significant.
The number of frost days there went from about 143 to 111 per year over the period.
The hottest day of the period reached 36.2 °C (on 10 August 2023) and the coldest -20.2 °C (on 30 January 1944).
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
HakurōmachiAomori
- coords
- 40.52°, 141.31°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.4°C
Average daily high
13.6°C
Average daily low
5.3°C
Annual rainfall
1,150mm
Sunshine / day
8.6h
Mean relative humidity
76%
Average peak wind
16.6km/h
Seasonal range
26.3°C
Frost days (< 0 °C)
127 d/yr
Hot days (≥ 30 °C)
9 d/yr
Rainy days (≥ 1 mm)
149 d/yr
Annual snowfall
140.1 cm
Average feels-like high
11.8 °C
Average feels-like low
3.0 °C
Average peak gust
41.2 km/h
Tropical nights (≥ 20 °C)
26 d/yr
Solar radiation
13.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.5 °C
since 1940
+0.3 °C per decade · r² = 0.59 · 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
36.2 °C
10 August 2023
Coldest day
-20.2 °C
30 January 1944
Wettest day
132 mm
18 September 1945
Windiest day
49.9 km/h
28 September 1991
Strongest gust
137.2 km/h
28 September 1991
Hottest feels-like
42.3 °C
23 August 2023
Coldest feels-like
-25.3 °C
28 January 1945
Snowiest day
57.6 cm
29 March 1966
Sunniest day
14.9 h
17 June 1942
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 | 2.5 °C | +2.4 °C | 51 mm | -2 mm |
| Feb | 2.5 °C | +1.6 °C | 33 mm | -24 mm |
| Mar | 7.7 °C | +2.3 °C | 121 mm | +40 mm |
| Apr | 13.5 °C | +0.3 °C | 104 mm | +19 mm |
| May | 19.3 °C | +0.8 °C | 99 mm | +10 mm |
| Jun | 26.1 °C | +4.6 °C | 57 mm | -53 mm |
| Jul | 30.7 °C | +5.7 °C | 53 mm | -95 mm |
| Aug | 30.0 °C | +3.4 °C | 90 mm | -64 mm |
| Sep | 25.5 °C | +3.1 °C | 130 mm | -18 mm |
| Oct | 16.7 °C | +0.2 °C | 64 mm | -33 mm |
| Nov | 10.4 °C | +0.8 °C | 130 mm | +63 mm |
| Dec | 4.7 °C | +1.7 °C | 95 mm | +34 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 Hakurōmachi?
Hakurōmachi has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 9.4 °C and it receives 1,150 mm of precipitation per year.
What is the hottest day ever recorded in Hakurōmachi?
The hottest day measured in Hakurōmachi between 1940 and 2025 was 10 August 2023, reaching 36.2 °C.
What is the coldest day in Hakurōmachi?
The coldest day measured in Hakurōmachi between 1940 and 2025 was 30 January 1944, at -20.2 °C.
Does it snow in Hakurōmachi?
Yes. Hakurōmachi gets on average 140.1 cm of snow per year and has around 127 frost days.
Has the climate of Hakurōmachi warmed?
Yes: Hakurōmachi warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Hakurōmachi?
The wettest day measured in Hakurōmachi between 1940 and 2025 was 18 September 1945, with 132 mm of rain in 24 hours.
What was the windiest day in Hakurōmachi?
The windiest day measured in Hakurōmachi between 1940 and 2025 was 28 September 1991, with winds reaching 49.9 km/h.
What is the warmest month in Hakurōmachi?
The warmest month in Hakurōmachi is August (22.7 °C on average); the coldest is January (-3.6 °C).
How much does it rain in Hakurōmachi?
Hakurōmachi receives on average 1,150 mm of precipitation per year, spread over about 149 rainy days.
Is it sunny in Hakurōmachi?
Hakurōmachi gets on average 8.6 hours of sunshine per day, roughly 3,139 hours per year over 1940-2025.
What is the biggest single-day snowfall in Hakurōmachi?
The heaviest 24-hour snowfall measured in Hakurōmachi between 1940 and 2025 was 29 March 1966, with 57.6 cm.
Are there tropical nights in Hakurōmachi?
Yes: Hakurōmachi has on average 26 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Hakurōmachi?
In Hakurōmachi, between 1940 and 2025, the highest apparent temperature reached 42.3 °C on 23 August 2023, and the lowest was -25.3 °C on 28 January 1945.
Compare Hakurōmachi with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Hakurōmachi