Usuki climate — normals and trends
Usuki (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 16.1 °C and it receives 1,653 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 (27.0 °C on average) and the coldest is January (5.4 °C). Rainfall peaks in June.
Usuki averages 18 frost days, 46 hot days (≥ 30 °C) and 134 rainy days per year.
Usuki has warmed by +2.7 °C between 1940 and 2025, or +0.32 °C per decade. This trend is statistically significant.
The number of frost days there went from about 30 to 6 per year over the period.
The hottest day of the period reached 38.6 °C (on 11 August 1969) and the coldest -5.3 °C (on 16 February 1977).
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
UsukiOita
- coords
- 33.12°, 131.80°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.1°C
Average daily high
20.3°C
Average daily low
12.3°C
Annual rainfall
1,653mm
Sunshine / day
8.8h
Mean relative humidity
75%
Average peak wind
14.0km/h
Seasonal range
21.6°C
Frost days (< 0 °C)
18 d/yr
Hot days (≥ 30 °C)
46 d/yr
Rainy days (≥ 1 mm)
134 d/yr
Annual snowfall
3.6 cm
Average feels-like high
20.6 °C
Average feels-like low
11.9 °C
Average peak gust
37.3 km/h
Tropical nights (≥ 20 °C)
93 d/yr
Solar radiation
15.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.7 °C
since 1940
+0.3 °C per decade · r² = 0.78 · 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
38.6 °C
11 August 1969
Coldest day
-5.3 °C
16 February 1977
Wettest day
300 mm
11 September 1963
Windiest day
63.4 km/h
6 September 2005
Strongest gust
184.7 km/h
7 September 2004
Hottest feels-like
44.3 °C
14 August 2020
Coldest feels-like
-11.9 °C
26 February 1981
Snowiest day
19.4 cm
15 February 1968
Sunniest day
13.9 h
2 June 1942
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 | 10.6 °C | +0.8 °C | 20 mm | -25 mm |
| Feb | 9.8 °C | -1.0 °C | 64 mm | -3 mm |
| Mar | 16.1 °C | +1.7 °C | 72 mm | -18 mm |
| Apr | 20.9 °C | +1.4 °C | 71 mm | -48 mm |
| May | 23.6 °C | +0.3 °C | 194 mm | +39 mm |
| Jun | 28.4 °C | +2.4 °C | 250 mm | -11 mm |
| Jul | 31.4 °C | +1.2 °C | 161 mm | -54 mm |
| Aug | 32.5 °C | +1.7 °C | 138 mm | -73 mm |
| Sep | 30.4 °C | +3.1 °C | 442 mm | +203 mm |
| Oct | 25.2 °C | +2.9 °C | 121 mm | -15 mm |
| Nov | 18.4 °C | +1.1 °C | 24 mm | -48 mm |
| Dec | 14.1 °C | +2.0 °C | 31 mm | -13 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 Usuki?
Usuki has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 16.1 °C and it receives 1,653 mm of precipitation per year.
What is the hottest day ever recorded in Usuki?
The hottest day measured in Usuki between 1940 and 2025 was 11 August 1969, reaching 38.6 °C.
What is the coldest day in Usuki?
The coldest day measured in Usuki between 1940 and 2025 was 16 February 1977, at -5.3 °C.
Does it snow in Usuki?
Yes. Usuki gets on average 3.6 cm of snow per year and has around 18 frost days.
Has the climate of Usuki warmed?
Yes: Usuki warmed by +2.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Usuki?
The wettest day measured in Usuki between 1940 and 2025 was 11 September 1963, with 300 mm of rain in 24 hours.
What was the windiest day in Usuki?
The windiest day measured in Usuki between 1940 and 2025 was 6 September 2005, with winds reaching 63.4 km/h.
What is the warmest month in Usuki?
The warmest month in Usuki is August (27.0 °C on average); the coldest is January (5.4 °C).
How much does it rain in Usuki?
Usuki receives on average 1,653 mm of precipitation per year, spread over about 134 rainy days.
Is it sunny in Usuki?
Usuki gets on average 8.8 hours of sunshine per day, roughly 3,212 hours per year over 1940-2025.
What is the biggest single-day snowfall in Usuki?
The heaviest 24-hour snowfall measured in Usuki between 1940 and 2025 was 15 February 1968, with 19.4 cm.
Are there tropical nights in Usuki?
Yes: Usuki has on average 93 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Usuki?
In Usuki, between 1940 and 2025, the highest apparent temperature reached 44.3 °C on 14 August 2020, and the lowest was -11.9 °C on 26 February 1981.
Compare Usuki with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Usuki