Minamata climate — normals and trends
Minamata (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 16.2 °C and it receives 2,059 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 (26.7 °C on average) and the coldest is January (5.5 °C). Rainfall peaks in June.
Minamata averages 18 frost days, 43 hot days (≥ 30 °C) and 157 rainy days per year.
Minamata 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 28 to 8 per year over the period.
The hottest day of the period reached 36.5 °C (on 8 August 2024) and the coldest -9.5 °C (on 24 January 1976).
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
MinamataKumamoto
- coords
- 32.22°, 130.40°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.2°C
Average daily high
20.3°C
Average daily low
12.6°C
Annual rainfall
2,059mm
Sunshine / day
8.2h
Mean relative humidity
77%
Average peak wind
13.1km/h
Seasonal range
21.2°C
Frost days (< 0 °C)
18 d/yr
Hot days (≥ 30 °C)
43 d/yr
Rainy days (≥ 1 mm)
157 d/yr
Annual snowfall
6.4 cm
Average feels-like high
20.7 °C
Average feels-like low
12.2 °C
Average peak gust
37.6 km/h
Tropical nights (≥ 20 °C)
95 d/yr
Solar radiation
14.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.5 °C
since 1940
+0.3 °C per decade · r² = 0.75 · 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
36.5 °C
8 August 2024
Coldest day
-9.5 °C
24 January 1976
Wettest day
221 mm
3 July 2019
Windiest day
67.3 km/h
27 September 1991
Strongest gust
192.2 km/h
27 September 1991
Hottest feels-like
43.8 °C
5 August 2024
Coldest feels-like
-14.3 °C
24 January 1976
Snowiest day
11.8 cm
23 January 1998
Sunniest day
13.7 h
6 June 1960
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 | 9.9 °C | +0.5 °C | 45 mm | -29 mm |
| Feb | 9.3 °C | -1.5 °C | 64 mm | -32 mm |
| Mar | 15.7 °C | +1.2 °C | 153 mm | +18 mm |
| Apr | 20.2 °C | +0.7 °C | 123 mm | -43 mm |
| May | 23.2 °C | 0.0 °C | 333 mm | +125 mm |
| Jun | 27.7 °C | +2.0 °C | 353 mm | -70 mm |
| Jul | 32.4 °C | +3.0 °C | 59 mm | -265 mm |
| Aug | 31.7 °C | +1.1 °C | 288 mm | +105 mm |
| Sep | 30.2 °C | +2.4 °C | 147 mm | -35 mm |
| Oct | 26.3 °C | +3.3 °C | 115 mm | +10 mm |
| Nov | 18.2 °C | +0.7 °C | 49 mm | -41 mm |
| Dec | 13.9 °C | +2.1 °C | 49 mm | -25 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 Minamata?
Minamata has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 16.2 °C and it receives 2,059 mm of precipitation per year.
What is the hottest day ever recorded in Minamata?
The hottest day measured in Minamata between 1940 and 2025 was 8 August 2024, reaching 36.5 °C.
What is the coldest day in Minamata?
The coldest day measured in Minamata between 1940 and 2025 was 24 January 1976, at -9.5 °C.
Does it snow in Minamata?
Yes. Minamata gets on average 6.4 cm of snow per year and has around 18 frost days.
Has the climate of Minamata warmed?
Yes: Minamata warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Minamata?
The wettest day measured in Minamata between 1940 and 2025 was 3 July 2019, with 221 mm of rain in 24 hours.
What was the windiest day in Minamata?
The windiest day measured in Minamata between 1940 and 2025 was 27 September 1991, with winds reaching 67.3 km/h.
What is the warmest month in Minamata?
The warmest month in Minamata is August (26.7 °C on average); the coldest is January (5.5 °C).
How much does it rain in Minamata?
Minamata receives on average 2,059 mm of precipitation per year, spread over about 157 rainy days.
Is it sunny in Minamata?
Minamata gets on average 8.2 hours of sunshine per day, roughly 2,993 hours per year over 1940-2025.
What is the biggest single-day snowfall in Minamata?
The heaviest 24-hour snowfall measured in Minamata between 1940 and 2025 was 23 January 1998, with 11.8 cm.
Are there tropical nights in Minamata?
Yes: Minamata has on average 95 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Minamata?
In Minamata, between 1940 and 2025, the highest apparent temperature reached 43.8 °C on 5 August 2024, and the lowest was -14.3 °C on 24 January 1976.
Compare Minamata with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Minamata