Myoko climate — normals and trends
Myoko (Japan) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 10.8 °C and it receives 2,231 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 (23.6 °C on average) and the coldest is January (-1.0 °C). Rainfall peaks in July.
Myoko averages 106 frost days, 9 hot days (≥ 30 °C) and 233 rainy days per year.
Myoko has warmed by +2.5 °C between 1940 and 2025, or +0.30 °C per decade. This trend is statistically significant.
The number of frost days there went from about 126 to 86 per year over the period.
The hottest day of the period reached 34.6 °C (on 22 August 2018) and the coldest -13.5 °C (on 17 January 1949).
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
MyokoNiigata
- coords
- 37.03°, 138.26°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.8°C
Average daily high
14.6°C
Average daily low
7.3°C
Annual rainfall
2,231mm
Sunshine / day
8.5h
Mean relative humidity
81%
Average peak wind
11.5km/h
Seasonal range
24.6°C
Frost days (< 0 °C)
106 d/yr
Hot days (≥ 30 °C)
9 d/yr
Rainy days (≥ 1 mm)
233 d/yr
Annual snowfall
379.1 cm
Average feels-like high
14.2 °C
Average feels-like low
5.8 °C
Average peak gust
37.2 km/h
Tropical nights (≥ 20 °C)
38 d/yr
Solar radiation
14.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.5 °C
since 1940
+0.3 °C per decade · r² = 0.66 · 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
34.6 °C
22 August 2018
Coldest day
-13.5 °C
17 January 1949
Wettest day
156 mm
8 July 1964
Windiest day
40.5 km/h
4 September 2018
Strongest gust
154.8 km/h
27 September 1959
Hottest feels-like
40.5 °C
23 August 2023
Coldest feels-like
-18.0 °C
17 January 1949
Snowiest day
44.5 cm
15 February 2014
Sunniest day
14.0 h
11 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 | 2.6 °C | +0.6 °C | 189 mm | -35 mm |
| Feb | 1.8 °C | -0.7 °C | 227 mm | +49 mm |
| Mar | 6.8 °C | +0.8 °C | 154 mm | -0 mm |
| Apr | 14.4 °C | +1.6 °C | 121 mm | +6 mm |
| May | 19.0 °C | 0.0 °C | 116 mm | -16 mm |
| Jun | 24.4 °C | +2.0 °C | 211 mm | +19 mm |
| Jul | 29.3 °C | +3.2 °C | 91 mm | -165 mm |
| Aug | 29.0 °C | +1.5 °C | 339 mm | +133 mm |
| Sep | 25.8 °C | +2.6 °C | 238 mm | +22 mm |
| Oct | 18.1 °C | +0.8 °C | 239 mm | +63 mm |
| Nov | 11.9 °C | +0.5 °C | 162 mm | -3 mm |
| Dec | 7.1 °C | +2.0 °C | 255 mm | +38 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 Myoko?
Myoko has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 10.8 °C and it receives 2,231 mm of precipitation per year.
What is the hottest day ever recorded in Myoko?
The hottest day measured in Myoko between 1940 and 2025 was 22 August 2018, reaching 34.6 °C.
What is the coldest day in Myoko?
The coldest day measured in Myoko between 1940 and 2025 was 17 January 1949, at -13.5 °C.
Does it snow in Myoko?
Yes. Myoko gets on average 379.1 cm of snow per year and has around 106 frost days.
Has the climate of Myoko warmed?
Yes: Myoko warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Myoko?
The wettest day measured in Myoko between 1940 and 2025 was 8 July 1964, with 156 mm of rain in 24 hours.
What was the windiest day in Myoko?
The windiest day measured in Myoko between 1940 and 2025 was 4 September 2018, with winds reaching 40.5 km/h.
What is the warmest month in Myoko?
The warmest month in Myoko is August (23.6 °C on average); the coldest is January (-1.0 °C).
How much does it rain in Myoko?
Myoko receives on average 2,231 mm of precipitation per year, spread over about 233 rainy days.
Is it sunny in Myoko?
Myoko gets on average 8.5 hours of sunshine per day, roughly 3,103 hours per year over 1940-2025.
What is the biggest single-day snowfall in Myoko?
The heaviest 24-hour snowfall measured in Myoko between 1940 and 2025 was 15 February 2014, with 44.5 cm.
Are there tropical nights in Myoko?
Yes: Myoko has on average 38 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Myoko?
In Myoko, between 1940 and 2025, the highest apparent temperature reached 40.5 °C on 23 August 2023, and the lowest was -18.0 °C on 17 January 1949.
Compare Myoko with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Myoko