Tsushima climate — normals and trends
Tsushima (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 16.3 °C and it receives 1,538 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 (26.5 °C on average) and the coldest is January (7.0 °C). Rainfall peaks in July.
Tsushima averages 3 frost days, 0 hot days (≥ 30 °C) and 122 rainy days per year.
Tsushima has warmed by +1.2 °C between 1940 and 2025, or +0.14 °C per decade. This trend is statistically significant.
The number of frost days there went from about 5 to 1 per year over the period.
The hottest day of the period reached 31.1 °C (on 19 August 2013) and the coldest -4.2 °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
TsushimaNagasaki
- coords
- 34.21°, 129.29°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.3°C
Average daily high
17.4°C
Average daily low
15.3°C
Annual rainfall
1,538mm
Sunshine / day
8.7h
Mean relative humidity
74%
Average peak wind
33.7km/h
Seasonal range
19.5°C
Frost days (< 0 °C)
3 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
122 d/yr
Annual snowfall
5.1 cm
Average feels-like high
16.0 °C
Average feels-like low
12.0 °C
Average peak gust
47.3 km/h
Tropical nights (≥ 20 °C)
115 d/yr
Solar radiation
15.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.2 °C
since 1940
+0.1 °C per decade · r² = 0.35 · 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
31.1 °C
19 August 2013
Coldest day
-4.2 °C
26 February 1981
Wettest day
397 mm
17 August 1949
Windiest day
122.8 km/h
31 August 1987
Strongest gust
212.4 km/h
31 August 1987
Hottest feels-like
38.9 °C
27 July 2018
Coldest feels-like
-15.9 °C
26 February 1981
Snowiest day
7.3 cm
1 February 1992
Sunniest day
13.8 h
19 June 1974
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 | 9.1 °C | +0.4 °C | 32 mm | -32 mm |
| Feb | 7.9 °C | -1.3 °C | 62 mm | -12 mm |
| Mar | 12.0 °C | +0.3 °C | 119 mm | +15 mm |
| Apr | 15.3 °C | +0.3 °C | 55 mm | -77 mm |
| May | 18.0 °C | -0.1 °C | 137 mm | -1 mm |
| Jun | 22.2 °C | +1.0 °C | 217 mm | +7 mm |
| Jul | 27.4 °C | +2.4 °C | 76 mm | -144 mm |
| Aug | 29.0 °C | +1.9 °C | 267 mm | +94 mm |
| Sep | 27.6 °C | +3.0 °C | 211 mm | +22 mm |
| Oct | 23.2 °C | +2.6 °C | 190 mm | +98 mm |
| Nov | 17.4 °C | +1.2 °C | 39 mm | -44 mm |
| Dec | 13.7 °C | +2.4 °C | 65 mm | +6 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 Tsushima?
Tsushima has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 16.3 °C and it receives 1,538 mm of precipitation per year.
What is the hottest day ever recorded in Tsushima?
The hottest day measured in Tsushima between 1940 and 2025 was 19 August 2013, reaching 31.1 °C.
What is the coldest day in Tsushima?
The coldest day measured in Tsushima between 1940 and 2025 was 26 February 1981, at -4.2 °C.
Does it snow in Tsushima?
Yes. Tsushima gets on average 5.1 cm of snow per year and has around 3 frost days.
Has the climate of Tsushima warmed?
Yes: Tsushima warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Tsushima?
The wettest day measured in Tsushima between 1940 and 2025 was 17 August 1949, with 397 mm of rain in 24 hours.
What was the windiest day in Tsushima?
The windiest day measured in Tsushima between 1940 and 2025 was 31 August 1987, with winds reaching 122.8 km/h.
What is the warmest month in Tsushima?
The warmest month in Tsushima is August (26.5 °C on average); the coldest is January (7.0 °C).
How much does it rain in Tsushima?
Tsushima receives on average 1,538 mm of precipitation per year, spread over about 122 rainy days.
Is it sunny in Tsushima?
Tsushima 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 Tsushima?
The heaviest 24-hour snowfall measured in Tsushima between 1940 and 2025 was 1 February 1992, with 7.3 cm.
Are there tropical nights in Tsushima?
Yes: Tsushima has on average 115 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Tsushima?
In Tsushima, between 1940 and 2025, the highest apparent temperature reached 38.9 °C on 27 July 2018, and the lowest was -15.9 °C on 26 February 1981.
Compare Tsushima with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Tsushima