Uki climate — normals and trends
Uki (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 14.7 °C and it receives 2,063 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 (25.4 °C on average) and the coldest is January (3.6 °C). Rainfall peaks in June.
Uki averages 32 frost days, 16 hot days (≥ 30 °C) and 164 rainy days per year.
Uki has warmed by +2.5 °C between 1940 and 2025, or +0.29 °C per decade. This trend is statistically significant.
The number of frost days there went from about 48 to 16 per year over the period.
The hottest day of the period reached 34.1 °C (on 3 August 2024) and the coldest -12.6 °C (on 19 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
UkiKumamoto
- coords
- 32.62°, 130.66°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
14.7°C
Average daily high
18.3°C
Average daily low
11.5°C
Annual rainfall
2,063mm
Sunshine / day
8.1h
Mean relative humidity
77%
Average peak wind
11.9km/h
Seasonal range
21.8°C
Frost days (< 0 °C)
32 d/yr
Hot days (≥ 30 °C)
16 d/yr
Rainy days (≥ 1 mm)
164 d/yr
Annual snowfall
18.8 cm
Average feels-like high
18.4 °C
Average feels-like low
10.9 °C
Average peak gust
35.2 km/h
Tropical nights (≥ 20 °C)
83 d/yr
Solar radiation
13.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.5 °C
since 1940
+0.3 °C per decade · r² = 0.73 · 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
34.1 °C
3 August 2024
Coldest day
-12.6 °C
19 February 1977
Wettest day
204 mm
26 June 1945
Windiest day
62.2 km/h
27 September 1991
Strongest gust
187.2 km/h
27 September 1991
Hottest feels-like
40.4 °C
5 August 2024
Coldest feels-like
-16.9 °C
24 January 1976
Snowiest day
11.7 cm
18 January 1984
Sunniest day
13.8 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 | 7.5 °C | +0.4 °C | 41 mm | -35 mm |
| Feb | 6.8 °C | -1.6 °C | 66 mm | -35 mm |
| Mar | 13.5 °C | +1.1 °C | 150 mm | +5 mm |
| Apr | 18.2 °C | +0.6 °C | 123 mm | -49 mm |
| May | 21.5 °C | +0.1 °C | 318 mm | +106 mm |
| Jun | 26.0 °C | +1.9 °C | 378 mm | -34 mm |
| Jul | 30.4 °C | +2.7 °C | 79 mm | -233 mm |
| Aug | 29.9 °C | +1.2 °C | 281 mm | +97 mm |
| Sep | 28.4 °C | +2.5 °C | 128 mm | -54 mm |
| Oct | 24.3 °C | +3.3 °C | 110 mm | +3 mm |
| Nov | 16.2 °C | +0.8 °C | 40 mm | -47 mm |
| Dec | 11.7 °C | +2.1 °C | 55 mm | -18 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 Uki?
Uki has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 14.7 °C and it receives 2,063 mm of precipitation per year.
What is the hottest day ever recorded in Uki?
The hottest day measured in Uki between 1940 and 2025 was 3 August 2024, reaching 34.1 °C.
What is the coldest day in Uki?
The coldest day measured in Uki between 1940 and 2025 was 19 February 1977, at -12.6 °C.
Does it snow in Uki?
Yes. Uki gets on average 18.8 cm of snow per year and has around 32 frost days.
Has the climate of Uki warmed?
Yes: Uki warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Uki?
The wettest day measured in Uki between 1940 and 2025 was 26 June 1945, with 204 mm of rain in 24 hours.
What was the windiest day in Uki?
The windiest day measured in Uki between 1940 and 2025 was 27 September 1991, with winds reaching 62.2 km/h.
What is the warmest month in Uki?
The warmest month in Uki is August (25.4 °C on average); the coldest is January (3.6 °C).
How much does it rain in Uki?
Uki receives on average 2,063 mm of precipitation per year, spread over about 164 rainy days.
Is it sunny in Uki?
Uki gets on average 8.1 hours of sunshine per day, roughly 2,957 hours per year over 1940-2025.
What is the biggest single-day snowfall in Uki?
The heaviest 24-hour snowfall measured in Uki between 1940 and 2025 was 18 January 1984, with 11.7 cm.
Are there tropical nights in Uki?
Yes: Uki has on average 83 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Uki?
In Uki, between 1940 and 2025, the highest apparent temperature reached 40.4 °C on 5 August 2024, and the lowest was -16.9 °C on 24 January 1976.
Compare Uki with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Uki