Sarubetsu climate — normals and trends
Sarubetsu (Japan) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 6.2 °C and it receives 1,160 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 (20.0 °C on average) and the coldest is January (-8.7 °C). Rainfall peaks in September.
Sarubetsu averages 160 frost days, 4 hot days (≥ 30 °C) and 123 rainy days per year.
Sarubetsu has warmed by +2.4 °C between 1940 and 2025, or +0.28 °C per decade. This trend is statistically significant.
The number of frost days there went from about 171 to 149 per year over the period.
The hottest day of the period reached 36.3 °C (on 24 July 2025) and the coldest -26.0 °C (on 9 January 1953).
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
SarubetsuHokkaido
- coords
- 42.87°, 143.34°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
6.2°C
Average daily high
11.0°C
Average daily low
1.6°C
Annual rainfall
1,160mm
Sunshine / day
8.3h
Mean relative humidity
76%
Average peak wind
13.5km/h
Seasonal range
28.7°C
Frost days (< 0 °C)
160 d/yr
Hot days (≥ 30 °C)
4 d/yr
Rainy days (≥ 1 mm)
123 d/yr
Annual snowfall
179.9 cm
Average feels-like high
9.1 °C
Average feels-like low
-0.9 °C
Average peak gust
30.6 km/h
Tropical nights (≥ 20 °C)
7 d/yr
Solar radiation
13.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.4 °C
since 1940
+0.3 °C per decade · r² = 0.58 · 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
36.3 °C
24 July 2025
Coldest day
-26.0 °C
9 January 1953
Wettest day
151 mm
5 August 1981
Windiest day
51.8 km/h
27 September 1954
Strongest gust
114.1 km/h
10 May 1954
Hottest feels-like
42.7 °C
24 July 2025
Coldest feels-like
-31.0 °C
9 January 1953
Snowiest day
50.8 cm
17 January 1975
Sunniest day
15.0 h
12 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 | 0.3 °C | +3.3 °C | 34 mm | -25 mm |
| Feb | 0.5 °C | +2.4 °C | 78 mm | +25 mm |
| Mar | 4.2 °C | +1.4 °C | 82 mm | +2 mm |
| Apr | 11.3 °C | +0.9 °C | 142 mm | +50 mm |
| May | 18.5 °C | +2.3 °C | 89 mm | -8 mm |
| Jun | 25.1 °C | +6.5 °C | 69 mm | -27 mm |
| Jul | 28.6 °C | +6.4 °C | 70 mm | -35 mm |
| Aug | 26.6 °C | +2.9 °C | 114 mm | -33 mm |
| Sep | 23.7 °C | +3.3 °C | 211 mm | +48 mm |
| Oct | 14.8 °C | 0.0 °C | 61 mm | -54 mm |
| Nov | 7.8 °C | +0.4 °C | 145 mm | +58 mm |
| Dec | 1.3 °C | +1.0 °C | 131 mm | +63 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 Sarubetsu?
Sarubetsu has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 6.2 °C and it receives 1,160 mm of precipitation per year.
What is the hottest day ever recorded in Sarubetsu?
The hottest day measured in Sarubetsu between 1940 and 2025 was 24 July 2025, reaching 36.3 °C.
What is the coldest day in Sarubetsu?
The coldest day measured in Sarubetsu between 1940 and 2025 was 9 January 1953, at -26.0 °C.
Does it snow in Sarubetsu?
Yes. Sarubetsu gets on average 179.9 cm of snow per year and has around 160 frost days.
Has the climate of Sarubetsu warmed?
Yes: Sarubetsu warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Sarubetsu?
The wettest day measured in Sarubetsu between 1940 and 2025 was 5 August 1981, with 151 mm of rain in 24 hours.
What was the windiest day in Sarubetsu?
The windiest day measured in Sarubetsu between 1940 and 2025 was 27 September 1954, with winds reaching 51.8 km/h.
What is the warmest month in Sarubetsu?
The warmest month in Sarubetsu is August (20.0 °C on average); the coldest is January (-8.7 °C).
How much does it rain in Sarubetsu?
Sarubetsu receives on average 1,160 mm of precipitation per year, spread over about 123 rainy days.
Is it sunny in Sarubetsu?
Sarubetsu 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 Sarubetsu?
The heaviest 24-hour snowfall measured in Sarubetsu between 1940 and 2025 was 17 January 1975, with 50.8 cm.
Are there tropical nights in Sarubetsu?
Yes: Sarubetsu has on average 7 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Sarubetsu?
In Sarubetsu, between 1940 and 2025, the highest apparent temperature reached 42.7 °C on 24 July 2025, and the lowest was -31.0 °C on 9 January 1953.
Compare Sarubetsu with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Sarubetsu