Mutsu climate — normals and trends
Mutsu (Japan) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.2 °C and it receives 1,293 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 February (-0.5 °C). Rainfall peaks in September.
Mutsu averages 76 frost days, 0 hot days (≥ 30 °C) and 165 rainy days per year.
Mutsu has warmed by +1.8 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.
The number of frost days there went from about 89 to 63 per year over the period.
The hottest day of the period reached 28.6 °C (on 26 August 2023) and the coldest -8.6 °C (on 24 January 1996).
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
MutsuAomori
- coords
- 41.29°, 141.22°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.2°C
Average daily high
10.4°C
Average daily low
8.0°C
Annual rainfall
1,293mm
Sunshine / day
8.7h
Mean relative humidity
80%
Average peak wind
34.4km/h
Seasonal range
22.0°C
Frost days (< 0 °C)
76 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
165 d/yr
Annual snowfall
199.5 cm
Average feels-like high
7.3 °C
Average feels-like low
3.1 °C
Average peak gust
48.1 km/h
Tropical nights (≥ 20 °C)
33 d/yr
Solar radiation
13.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.25 · 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
28.6 °C
26 August 2023
Coldest day
-8.6 °C
24 January 1996
Wettest day
116 mm
1 July 1985
Windiest day
90.2 km/h
27 September 1959
Strongest gust
141.5 km/h
27 September 1959
Hottest feels-like
36.4 °C
26 August 2023
Coldest feels-like
-21.6 °C
3 February 2001
Snowiest day
32.1 cm
29 March 1966
Sunniest day
14.9 h
10 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 | 3.7 °C | +2.8 °C | 122 mm | +6 mm |
| Feb | 3.2 °C | +2.5 °C | 126 mm | +36 mm |
| Mar | 5.6 °C | +2.5 °C | 118 mm | +37 mm |
| Apr | 8.9 °C | +2.2 °C | 123 mm | +41 mm |
| May | 13.1 °C | +2.1 °C | 80 mm | -12 mm |
| Jun | 17.9 °C | +2.9 °C | 68 mm | -25 mm |
| Jul | 23.9 °C | +4.6 °C | 62 mm | -76 mm |
| Aug | 25.6 °C | +3.3 °C | 161 mm | +16 mm |
| Sep | 23.7 °C | +3.1 °C | 146 mm | -10 mm |
| Oct | 16.6 °C | +2.1 °C | 120 mm | +10 mm |
| Nov | 11.1 °C | +3.7 °C | 174 mm | +90 mm |
| Dec | 6.2 °C | +3.2 °C | 182 mm | +75 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 Mutsu?
Mutsu has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 9.2 °C and it receives 1,293 mm of precipitation per year.
What is the hottest day ever recorded in Mutsu?
The hottest day measured in Mutsu between 1940 and 2025 was 26 August 2023, reaching 28.6 °C.
What is the coldest day in Mutsu?
The coldest day measured in Mutsu between 1940 and 2025 was 24 January 1996, at -8.6 °C.
Does it snow in Mutsu?
Yes. Mutsu gets on average 199.5 cm of snow per year and has around 76 frost days.
Has the climate of Mutsu warmed?
Yes: Mutsu warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Mutsu?
The wettest day measured in Mutsu between 1940 and 2025 was 1 July 1985, with 116 mm of rain in 24 hours.
What was the windiest day in Mutsu?
The windiest day measured in Mutsu between 1940 and 2025 was 27 September 1959, with winds reaching 90.2 km/h.
What is the warmest month in Mutsu?
The warmest month in Mutsu is August (21.5 °C on average); the coldest is February (-0.5 °C).
How much does it rain in Mutsu?
Mutsu receives on average 1,293 mm of precipitation per year, spread over about 165 rainy days.
Is it sunny in Mutsu?
Mutsu 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 Mutsu?
The heaviest 24-hour snowfall measured in Mutsu between 1940 and 2025 was 29 March 1966, with 32.1 cm.
Are there tropical nights in Mutsu?
Yes: Mutsu has on average 33 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Mutsu?
In Mutsu, between 1940 and 2025, the highest apparent temperature reached 36.4 °C on 26 August 2023, and the lowest was -21.6 °C on 3 February 2001.
Compare Mutsu with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Mutsu