Sumoto climate — normals and trends
Sumoto (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 16.6 °C and it receives 1,740 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 (26.3 °C on average) and the coldest is January (7.7 °C). Rainfall peaks in June.
Sumoto averages 0 frost days, 0 hot days (≥ 30 °C) and 149 rainy days per year.
Sumoto has warmed by +0.7 °C between 1940 and 2025, or +0.08 °C per decade. This trend is statistically significant.
The hottest day of the period reached 32.3 °C (on 17 August 2002) and the coldest -1.2 °C (on 26 February 1981).
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
SumotoHyōgo
- coords
- 34.34°, 134.89°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.6°C
Average daily high
18.1°C
Average daily low
15.2°C
Annual rainfall
1,740mm
Sunshine / day
9.1h
Mean relative humidity
75%
Average peak wind
30.1km/h
Seasonal range
18.6°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
149 d/yr
Annual snowfall
6.0 cm
Average feels-like high
17.4 °C
Average feels-like low
12.7 °C
Average peak gust
43.4 km/h
Tropical nights (≥ 20 °C)
114 d/yr
Solar radiation
15.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.7 °C
since 1940
+0.1 °C per decade · r² = 0.30 · 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
17 August 2002
Coldest day
-1.2 °C
26 February 1981
Wettest day
213 mm
22 October 2017
Windiest day
104.8 km/h
25 September 1964
Strongest gust
169.2 km/h
26 September 1959
Hottest feels-like
37.5 °C
25 July 2002
Coldest feels-like
-11.5 °C
26 February 1981
Snowiest day
8.1 cm
26 February 1981
Sunniest day
14.0 h
28 May 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 | 9.3 °C | -0.2 °C | 61 mm | -37 mm |
| Feb | 7.7 °C | -2.0 °C | 53 mm | -46 mm |
| Mar | 11.6 °C | -0.7 °C | 99 mm | -23 mm |
| Apr | 15.6 °C | -0.5 °C | 65 mm | -77 mm |
| May | 18.9 °C | -0.1 °C | 252 mm | +85 mm |
| Jun | 23.1 °C | +1.1 °C | 203 mm | -39 mm |
| Jul | 27.3 °C | +1.8 °C | 73 mm | -109 mm |
| Aug | 28.3 °C | +1.2 °C | 203 mm | +90 mm |
| Sep | 27.1 °C | +1.6 °C | 151 mm | -61 mm |
| Oct | 22.8 °C | +1.6 °C | 262 mm | +95 mm |
| Nov | 17.3 °C | +0.5 °C | 45 mm | -64 mm |
| Dec | 13.4 °C | +1.3 °C | 65 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 Sumoto?
Sumoto has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 16.6 °C and it receives 1,740 mm of precipitation per year.
What is the hottest day ever recorded in Sumoto?
The hottest day measured in Sumoto between 1940 and 2025 was 17 August 2002, reaching 32.3 °C.
What is the coldest day in Sumoto?
The coldest day measured in Sumoto between 1940 and 2025 was 26 February 1981, at -1.2 °C.
Does it snow in Sumoto?
Yes. Sumoto gets on average 6.0 cm of snow per year and has around 0 frost days.
Has the climate of Sumoto warmed?
Yes: Sumoto warmed by +0.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Sumoto?
The wettest day measured in Sumoto between 1940 and 2025 was 22 October 2017, with 213 mm of rain in 24 hours.
What was the windiest day in Sumoto?
The windiest day measured in Sumoto between 1940 and 2025 was 25 September 1964, with winds reaching 104.8 km/h.
What is the warmest month in Sumoto?
The warmest month in Sumoto is August (26.3 °C on average); the coldest is January (7.7 °C).
How much does it rain in Sumoto?
Sumoto receives on average 1,740 mm of precipitation per year, spread over about 149 rainy days.
Is it sunny in Sumoto?
Sumoto gets on average 9.1 hours of sunshine per day, roughly 3,322 hours per year over 1940-2025.
What is the biggest single-day snowfall in Sumoto?
The heaviest 24-hour snowfall measured in Sumoto between 1940 and 2025 was 26 February 1981, with 8.1 cm.
Are there tropical nights in Sumoto?
Yes: Sumoto has on average 114 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Sumoto?
In Sumoto, between 1940 and 2025, the highest apparent temperature reached 37.5 °C on 25 July 2002, and the lowest was -11.5 °C on 26 February 1981.
Compare Sumoto with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Sumoto