Nayoro climate — normals and trends
Nayoro (Japan) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 5.0 °C and it receives 1,202 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 (-9.3 °C). Rainfall peaks in August.
Nayoro averages 172 frost days, 0 hot days (≥ 30 °C) and 188 rainy days per year.
Nayoro has warmed by +2.2 °C between 1940 and 2025, or +0.26 °C per decade. This trend is statistically significant.
The number of frost days there went from about 182 to 162 per year over the period.
The hottest day of the period reached 32.3 °C (on 4 June 2014) and the coldest -30.3 °C (on 26 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
NayoroHokkaido
- coords
- 44.35°, 142.46°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
5.0°C
Average daily high
8.9°C
Average daily low
0.8°C
Annual rainfall
1,202mm
Sunshine / day
7.9h
Mean relative humidity
80%
Average peak wind
16.2km/h
Seasonal range
28.4°C
Frost days (< 0 °C)
172 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
188 d/yr
Annual snowfall
280.7 cm
Average feels-like high
6.4 °C
Average feels-like low
-2.1 °C
Average peak gust
41.4 km/h
Tropical nights (≥ 20 °C)
4 d/yr
Solar radiation
12.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.2 °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
32.3 °C
4 June 2014
Coldest day
-30.3 °C
26 January 1985
Wettest day
214 mm
23 August 1975
Windiest day
56.1 km/h
27 September 1954
Strongest gust
145.4 km/h
27 September 1954
Hottest feels-like
37.0 °C
23 August 2023
Coldest feels-like
-34.9 °C
17 January 2008
Snowiest day
39.6 cm
17 December 2014
Sunniest day
15.0 h
29 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 | -3.0 °C | +2.9 °C | 50 mm | -17 mm |
| Feb | -1.7 °C | +3.0 °C | 60 mm | +2 mm |
| Mar | 1.4 °C | +1.3 °C | 95 mm | +22 mm |
| Apr | 9.5 °C | +1.9 °C | 114 mm | +35 mm |
| May | 17.3 °C | +2.9 °C | 83 mm | -7 mm |
| Jun | 22.2 °C | +3.7 °C | 121 mm | +27 mm |
| Jul | 26.8 °C | +4.6 °C | 105 mm | -22 mm |
| Aug | 25.5 °C | +2.6 °C | 188 mm | +28 mm |
| Sep | 21.8 °C | +3.0 °C | 171 mm | +37 mm |
| Oct | 12.0 °C | -0.1 °C | 112 mm | -6 mm |
| Nov | 4.8 °C | +1.1 °C | 149 mm | +37 mm |
| Dec | -1.1 °C | +1.8 °C | 152 mm | +62 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 Nayoro?
Nayoro has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 5.0 °C and it receives 1,202 mm of precipitation per year.
What is the hottest day ever recorded in Nayoro?
The hottest day measured in Nayoro between 1940 and 2025 was 4 June 2014, reaching 32.3 °C.
What is the coldest day in Nayoro?
The coldest day measured in Nayoro between 1940 and 2025 was 26 January 1985, at -30.3 °C.
Does it snow in Nayoro?
Yes. Nayoro gets on average 280.7 cm of snow per year and has around 172 frost days.
Has the climate of Nayoro warmed?
Yes: Nayoro warmed by +2.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Nayoro?
The wettest day measured in Nayoro between 1940 and 2025 was 23 August 1975, with 214 mm of rain in 24 hours.
What was the windiest day in Nayoro?
The windiest day measured in Nayoro between 1940 and 2025 was 27 September 1954, with winds reaching 56.1 km/h.
What is the warmest month in Nayoro?
The warmest month in Nayoro is August (19.1 °C on average); the coldest is January (-9.3 °C).
How much does it rain in Nayoro?
Nayoro receives on average 1,202 mm of precipitation per year, spread over about 188 rainy days.
Is it sunny in Nayoro?
Nayoro gets on average 7.9 hours of sunshine per day, roughly 2,884 hours per year over 1940-2025.
What is the biggest single-day snowfall in Nayoro?
The heaviest 24-hour snowfall measured in Nayoro between 1940 and 2025 was 17 December 2014, with 39.6 cm.
Are there tropical nights in Nayoro?
Yes: Nayoro has on average 4 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Nayoro?
In Nayoro, between 1940 and 2025, the highest apparent temperature reached 37.0 °C on 23 August 2023, and the lowest was -34.9 °C on 17 January 2008.
Compare Nayoro with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Nayoro