Muikamachi climate — normals and trends
Muikamachi (Japan) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.2 °C and it receives 2,114 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 (21.3 °C on average) and the coldest is January (-4.2 °C). Rainfall peaks in July.
Muikamachi averages 142 frost days, 1 hot days (≥ 30 °C) and 233 rainy days per year.
Muikamachi has warmed by +2.6 °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 159 to 125 per year over the period.
The hottest day of the period reached 31.5 °C (on 16 August 1984) and the coldest -20.0 °C (on 7 February 2020).
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
MuikamachiNiigata
- coords
- 37.07°, 138.88°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.2°C
Average daily high
12.2°C
Average daily low
4.4°C
Annual rainfall
2,114mm
Sunshine / day
8.3h
Mean relative humidity
81%
Average peak wind
10.2km/h
Seasonal range
25.5°C
Frost days (< 0 °C)
142 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
233 d/yr
Annual snowfall
467.8 cm
Average feels-like high
11.2 °C
Average feels-like low
2.5 °C
Average peak gust
41.2 km/h
Tropical nights (≥ 20 °C)
6 d/yr
Solar radiation
14.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.6 °C
since 1940
+0.3 °C per decade · r² = 0.64 · 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
31.5 °C
16 August 1984
Coldest day
-20.0 °C
7 February 2020
Wettest day
145 mm
12 October 2019
Windiest day
42.7 km/h
16 September 1961
Strongest gust
217.8 km/h
27 September 1959
Hottest feels-like
37.0 °C
29 July 2023
Coldest feels-like
-24.7 °C
7 February 2020
Snowiest day
58.3 cm
15 February 2014
Sunniest day
14.1 h
13 June 2008
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 | -0.6 °C | +0.4 °C | 165 mm | -27 mm |
| Feb | -1.4 °C | -1.2 °C | 211 mm | +47 mm |
| Mar | 5.3 °C | +1.7 °C | 156 mm | -6 mm |
| Apr | 12.0 °C | +2.1 °C | 146 mm | +17 mm |
| May | 16.9 °C | 0.0 °C | 164 mm | +18 mm |
| Jun | 22.8 °C | +2.4 °C | 208 mm | +11 mm |
| Jul | 27.6 °C | +3.4 °C | 83 mm | -163 mm |
| Aug | 26.9 °C | +1.5 °C | 269 mm | +77 mm |
| Sep | 23.4 °C | +2.3 °C | 227 mm | +27 mm |
| Oct | 15.7 °C | +0.7 °C | 180 mm | +18 mm |
| Nov | 9.0 °C | +0.4 °C | 153 mm | +10 mm |
| Dec | 2.9 °C | +0.9 °C | 209 mm | +30 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 Muikamachi?
Muikamachi has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 8.2 °C and it receives 2,114 mm of precipitation per year.
What is the hottest day ever recorded in Muikamachi?
The hottest day measured in Muikamachi between 1940 and 2025 was 16 August 1984, reaching 31.5 °C.
What is the coldest day in Muikamachi?
The coldest day measured in Muikamachi between 1940 and 2025 was 7 February 2020, at -20.0 °C.
Does it snow in Muikamachi?
Yes. Muikamachi gets on average 467.8 cm of snow per year and has around 142 frost days.
Has the climate of Muikamachi warmed?
Yes: Muikamachi warmed by +2.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Muikamachi?
The wettest day measured in Muikamachi between 1940 and 2025 was 12 October 2019, with 145 mm of rain in 24 hours.
What was the windiest day in Muikamachi?
The windiest day measured in Muikamachi between 1940 and 2025 was 16 September 1961, with winds reaching 42.7 km/h.
What is the warmest month in Muikamachi?
The warmest month in Muikamachi is August (21.3 °C on average); the coldest is January (-4.2 °C).
How much does it rain in Muikamachi?
Muikamachi receives on average 2,114 mm of precipitation per year, spread over about 233 rainy days.
Is it sunny in Muikamachi?
Muikamachi 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 Muikamachi?
The heaviest 24-hour snowfall measured in Muikamachi between 1940 and 2025 was 15 February 2014, with 58.3 cm.
Are there tropical nights in Muikamachi?
Yes: Muikamachi has on average 6 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Muikamachi?
In Muikamachi, between 1940 and 2025, the highest apparent temperature reached 37.0 °C on 29 July 2023, and the lowest was -24.7 °C on 7 February 2020.
Compare Muikamachi with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Muikamachi