Ishikari climate — normals and trends
Ishikari (Japan) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.0 °C and it receives 1,175 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 (21.5 °C on average) and the coldest is January (-4.5 °C). Rainfall peaks in August.
Ishikari averages 127 frost days, 0 hot days (≥ 30 °C) and 180 rainy days per year.
Ishikari has warmed by +2.4 °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 144 to 110 per year over the period.
The hottest day of the period reached 31.2 °C (on 26 August 2023) and the coldest -16.0 °C (on 17 January 1940).
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
IshikariHokkaido
- coords
- 43.24°, 141.35°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.0°C
Average daily high
10.4°C
Average daily low
5.5°C
Annual rainfall
1,175mm
Sunshine / day
8.7h
Mean relative humidity
77%
Average peak wind
21.1km/h
Seasonal range
26.0°C
Frost days (< 0 °C)
127 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
180 d/yr
Annual snowfall
222.9 cm
Average feels-like high
8.3 °C
Average feels-like low
2.3 °C
Average peak gust
37.6 km/h
Tropical nights (≥ 20 °C)
20 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 = 0.65 · 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
31.2 °C
26 August 2023
Coldest day
-16.0 °C
17 January 1940
Wettest day
161 mm
17 August 2016
Windiest day
68.0 km/h
26 November 1986
Strongest gust
129.2 km/h
5 September 2018
Hottest feels-like
38.6 °C
24 August 2023
Coldest feels-like
-22.1 °C
12 January 1979
Snowiest day
31.4 cm
5 February 1969
Sunniest day
15.0 h
19 June 1941
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 | 0.5 °C | +2.9 °C | 105 mm | +26 mm |
| Feb | 1.3 °C | +3.1 °C | 103 mm | +36 mm |
| Mar | 3.5 °C | +1.7 °C | 93 mm | +28 mm |
| Apr | 10.2 °C | +2.1 °C | 102 mm | +31 mm |
| May | 16.8 °C | +3.1 °C | 58 mm | -25 mm |
| Jun | 21.9 °C | +4.0 °C | 97 mm | +15 mm |
| Jul | 27.1 °C | +5.1 °C | 108 mm | -7 mm |
| Aug | 26.4 °C | +2.6 °C | 168 mm | +9 mm |
| Sep | 23.4 °C | +2.9 °C | 201 mm | +62 mm |
| Oct | 14.4 °C | +0.1 °C | 121 mm | +12 mm |
| Nov | 8.4 °C | +1.6 °C | 167 mm | +60 mm |
| Dec | 2.4 °C | +1.9 °C | 148 mm | +51 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 Ishikari?
Ishikari has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 8.0 °C and it receives 1,175 mm of precipitation per year.
What is the hottest day ever recorded in Ishikari?
The hottest day measured in Ishikari between 1940 and 2025 was 26 August 2023, reaching 31.2 °C.
What is the coldest day in Ishikari?
The coldest day measured in Ishikari between 1940 and 2025 was 17 January 1940, at -16.0 °C.
Does it snow in Ishikari?
Yes. Ishikari gets on average 222.9 cm of snow per year and has around 127 frost days.
Has the climate of Ishikari warmed?
Yes: Ishikari warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Ishikari?
The wettest day measured in Ishikari between 1940 and 2025 was 17 August 2016, with 161 mm of rain in 24 hours.
What was the windiest day in Ishikari?
The windiest day measured in Ishikari between 1940 and 2025 was 26 November 1986, with winds reaching 68.0 km/h.
What is the warmest month in Ishikari?
The warmest month in Ishikari is August (21.5 °C on average); the coldest is January (-4.5 °C).
How much does it rain in Ishikari?
Ishikari receives on average 1,175 mm of precipitation per year, spread over about 180 rainy days.
Is it sunny in Ishikari?
Ishikari gets on average 8.7 hours of sunshine per day, roughly 3,175 hours per year over 1940-2025.
What is the biggest single-day snowfall in Ishikari?
The heaviest 24-hour snowfall measured in Ishikari between 1940 and 2025 was 5 February 1969, with 31.4 cm.
Are there tropical nights in Ishikari?
Yes: Ishikari has on average 20 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Ishikari?
In Ishikari, between 1940 and 2025, the highest apparent temperature reached 38.6 °C on 24 August 2023, and the lowest was -22.1 °C on 12 January 1979.
Compare Ishikari with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Ishikari