Kōta climate — normals and trends
Kōta (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 16.0 °C and it receives 1,783 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 (5.7 °C). Rainfall peaks in June.
Kōta averages 7 frost days, 28 hot days (≥ 30 °C) and 137 rainy days per year.
Kōta 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 17 to 0 per year over the period.
The hottest day of the period reached 37.7 °C (on 23 July 2018) and the coldest -4.8 °C (on 23 February 1953).
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
KōtaAichi
- coords
- 34.87°, 137.17°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.0°C
Average daily high
19.2°C
Average daily low
13.0°C
Annual rainfall
1,783mm
Sunshine / day
8.8h
Mean relative humidity
72%
Average peak wind
23.7km/h
Seasonal range
21.3°C
Frost days (< 0 °C)
7 d/yr
Hot days (≥ 30 °C)
28 d/yr
Rainy days (≥ 1 mm)
137 d/yr
Annual snowfall
2.5 cm
Average feels-like high
18.4 °C
Average feels-like low
11.2 °C
Average peak gust
42.7 km/h
Tropical nights (≥ 20 °C)
95 d/yr
Solar radiation
15.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.5 °C
since 1940
+0.3 °C per decade · r² = 0.68 · 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
37.7 °C
23 July 2018
Coldest day
-4.8 °C
23 February 1953
Wettest day
201 mm
12 October 2019
Windiest day
113.2 km/h
26 September 1959
Strongest gust
216.4 km/h
26 September 1959
Hottest feels-like
41.9 °C
5 August 1994
Coldest feels-like
-11.0 °C
26 February 1981
Snowiest day
11.8 cm
12 February 1994
Sunniest day
14.0 h
10 June 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 | 10.0 °C | +1.1 °C | 35 mm | -22 mm |
| Feb | 9.1 °C | -0.6 °C | 26 mm | -48 mm |
| Mar | 14.4 °C | +1.4 °C | 110 mm | -11 mm |
| Apr | 19.2 °C | +1.5 °C | 125 mm | -21 mm |
| May | 22.1 °C | +0.4 °C | 254 mm | +80 mm |
| Jun | 27.0 °C | +2.3 °C | 245 mm | +3 mm |
| Jul | 31.1 °C | +2.7 °C | 126 mm | -99 mm |
| Aug | 32.7 °C | +2.7 °C | 106 mm | -62 mm |
| Sep | 29.5 °C | +2.7 °C | 256 mm | +28 mm |
| Oct | 22.9 °C | +1.2 °C | 211 mm | +27 mm |
| Nov | 17.0 °C | +0.3 °C | 32 mm | -72 mm |
| Dec | 12.6 °C | +1.2 °C | 82 mm | +20 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 Kōta?
Kōta has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 16.0 °C and it receives 1,783 mm of precipitation per year.
What is the hottest day ever recorded in Kōta?
The hottest day measured in Kōta between 1940 and 2025 was 23 July 2018, reaching 37.7 °C.
What is the coldest day in Kōta?
The coldest day measured in Kōta between 1940 and 2025 was 23 February 1953, at -4.8 °C.
Does it snow in Kōta?
Yes. Kōta gets on average 2.5 cm of snow per year and has around 7 frost days.
Has the climate of Kōta warmed?
Yes: Kōta warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Kōta?
The wettest day measured in Kōta between 1940 and 2025 was 12 October 2019, with 201 mm of rain in 24 hours.
What was the windiest day in Kōta?
The windiest day measured in Kōta between 1940 and 2025 was 26 September 1959, with winds reaching 113.2 km/h.
What is the warmest month in Kōta?
The warmest month in Kōta is August (27.0 °C on average); the coldest is January (5.7 °C).
How much does it rain in Kōta?
Kōta receives on average 1,783 mm of precipitation per year, spread over about 137 rainy days.
Is it sunny in Kōta?
Kōta 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 Kōta?
The heaviest 24-hour snowfall measured in Kōta between 1940 and 2025 was 12 February 1994, with 11.8 cm.
Are there tropical nights in Kōta?
Yes: Kōta has on average 95 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Kōta?
In Kōta, between 1940 and 2025, the highest apparent temperature reached 41.9 °C on 5 August 1994, and the lowest was -11.0 °C on 26 February 1981.
Compare Kōta with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Kōta