Wakkanai climate — normals and trends
Wakkanai (Japan) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 6.4 °C and it receives 982 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 (19.1 °C on average) and the coldest is January (-5.5 °C). Rainfall peaks in August.
Wakkanai averages 132 frost days, 0 hot days (≥ 30 °C) and 157 rainy days per year.
Wakkanai has warmed by +2.0 °C between 1940 and 2025, or +0.23 °C per decade. This trend is statistically significant.
The number of frost days there went from about 144 to 120 per year over the period.
The hottest day of the period reached 30.1 °C (on 29 July 2021) and the coldest -19.9 °C (on 25 January 1985).
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
WakkanaiHokkaido
- coords
- 45.41°, 141.67°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
6.4°C
Average daily high
8.5°C
Average daily low
4.1°C
Annual rainfall
982mm
Sunshine / day
8.3h
Mean relative humidity
77%
Average peak wind
26.5km/h
Seasonal range
24.6°C
Frost days (< 0 °C)
132 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
157 d/yr
Annual snowfall
215.9 cm
Average feels-like high
5.1 °C
Average feels-like low
-0.2 °C
Average peak gust
46.5 km/h
Tropical nights (≥ 20 °C)
6 d/yr
Solar radiation
13.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.51 · 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
30.1 °C
29 July 2021
Coldest day
-19.9 °C
25 January 1985
Wettest day
88 mm
30 August 1955
Windiest day
75.2 km/h
9 September 1948
Strongest gust
160.6 km/h
8 November 1995
Hottest feels-like
34.3 °C
26 July 2021
Coldest feels-like
-28.4 °C
12 January 1979
Snowiest day
40.3 cm
1 December 1972
Sunniest day
15.0 h
24 May 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 | -0.9 °C | +2.9 °C | 84 mm | +20 mm |
| Feb | -0.3 °C | +3.1 °C | 64 mm | +12 mm |
| Mar | 1.8 °C | +1.3 °C | 87 mm | +30 mm |
| Apr | 7.6 °C | +1.3 °C | 96 mm | +33 mm |
| May | 13.4 °C | +2.5 °C | 37 mm | -36 mm |
| Jun | 17.9 °C | +3.3 °C | 53 mm | -13 mm |
| Jul | 24.1 °C | +5.0 °C | 43 mm | -52 mm |
| Aug | 24.9 °C | +3.5 °C | 254 mm | +133 mm |
| Sep | 21.9 °C | +3.2 °C | 169 mm | +50 mm |
| Oct | 12.3 °C | -0.5 °C | 93 mm | -8 mm |
| Nov | 6.3 °C | +1.0 °C | 107 mm | +12 mm |
| Dec | 0.7 °C | +1.4 °C | 99 mm | +21 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 Wakkanai?
Wakkanai has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 6.4 °C and it receives 982 mm of precipitation per year.
What is the hottest day ever recorded in Wakkanai?
The hottest day measured in Wakkanai between 1940 and 2025 was 29 July 2021, reaching 30.1 °C.
What is the coldest day in Wakkanai?
The coldest day measured in Wakkanai between 1940 and 2025 was 25 January 1985, at -19.9 °C.
Does it snow in Wakkanai?
Yes. Wakkanai gets on average 215.9 cm of snow per year and has around 132 frost days.
Has the climate of Wakkanai warmed?
Yes: Wakkanai warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Wakkanai?
The wettest day measured in Wakkanai between 1940 and 2025 was 30 August 1955, with 88 mm of rain in 24 hours.
What was the windiest day in Wakkanai?
The windiest day measured in Wakkanai between 1940 and 2025 was 9 September 1948, with winds reaching 75.2 km/h.
What is the warmest month in Wakkanai?
The warmest month in Wakkanai is August (19.1 °C on average); the coldest is January (-5.5 °C).
How much does it rain in Wakkanai?
Wakkanai receives on average 982 mm of precipitation per year, spread over about 157 rainy days.
Is it sunny in Wakkanai?
Wakkanai 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 Wakkanai?
The heaviest 24-hour snowfall measured in Wakkanai between 1940 and 2025 was 1 December 1972, with 40.3 cm.
Are there tropical nights in Wakkanai?
Yes: Wakkanai has on average 6 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Wakkanai?
In Wakkanai, between 1940 and 2025, the highest apparent temperature reached 34.3 °C on 26 July 2021, and the lowest was -28.4 °C on 12 January 1979.
Compare Wakkanai with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Wakkanai