Katō climate — normals and trends
Katō (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 14.6 °C and it receives 1,443 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 (26.7 °C on average) and the coldest is January (3.4 °C). Rainfall peaks in July.
Katō averages 60 frost days, 40 hot days (≥ 30 °C) and 125 rainy days per year.
Katō has warmed by +2.8 °C between 1940 and 2025, or +0.33 °C per decade. This trend is statistically significant.
The number of frost days there went from about 83 to 37 per year over the period.
The hottest day of the period reached 39.6 °C (on 8 August 1994) and the coldest -11.2 °C (on 21 February 1968).
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
KatōHyōgo
- coords
- 34.92°, 135.03°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
14.6°C
Average daily high
19.1°C
Average daily low
10.4°C
Annual rainfall
1,443mm
Sunshine / day
8.8h
Mean relative humidity
74%
Average peak wind
15.7km/h
Seasonal range
23.3°C
Frost days (< 0 °C)
60 d/yr
Hot days (≥ 30 °C)
40 d/yr
Rainy days (≥ 1 mm)
125 d/yr
Annual snowfall
10.5 cm
Average feels-like high
18.6 °C
Average feels-like low
9.5 °C
Average peak gust
37.5 km/h
Tropical nights (≥ 20 °C)
76 d/yr
Solar radiation
14.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.8 °C
since 1940
+0.3 °C per decade · r² = 0.71 · 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
39.6 °C
8 August 1994
Coldest day
-11.2 °C
21 February 1968
Wettest day
164 mm
27 October 1961
Windiest day
65.6 km/h
27 September 1991
Strongest gust
162.4 km/h
30 August 2004
Hottest feels-like
44.7 °C
30 July 2025
Coldest feels-like
-16.4 °C
21 February 1968
Snowiest day
27.4 cm
15 February 1968
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 | 8.7 °C | +1.0 °C | 21 mm | -24 mm |
| Feb | 7.6 °C | -0.8 °C | 29 mm | -31 mm |
| Mar | 13.4 °C | +1.2 °C | 113 mm | +16 mm |
| Apr | 19.5 °C | +1.5 °C | 63 mm | -57 mm |
| May | 23.0 °C | +0.6 °C | 154 mm | +16 mm |
| Jun | 28.2 °C | +2.5 °C | 169 mm | -24 mm |
| Jul | 34.1 °C | +4.8 °C | 55 mm | -153 mm |
| Aug | 33.7 °C | +2.8 °C | 136 mm | -2 mm |
| Sep | 30.0 °C | +3.2 °C | 147 mm | -52 mm |
| Oct | 22.8 °C | +1.6 °C | 201 mm | +75 mm |
| Nov | 16.3 °C | +0.6 °C | 30 mm | -43 mm |
| Dec | 11.7 °C | +1.4 °C | 32 mm | -14 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 Katō?
Katō has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 14.6 °C and it receives 1,443 mm of precipitation per year.
What is the hottest day ever recorded in Katō?
The hottest day measured in Katō between 1940 and 2025 was 8 August 1994, reaching 39.6 °C.
What is the coldest day in Katō?
The coldest day measured in Katō between 1940 and 2025 was 21 February 1968, at -11.2 °C.
Does it snow in Katō?
Yes. Katō gets on average 10.5 cm of snow per year and has around 60 frost days.
Has the climate of Katō warmed?
Yes: Katō warmed by +2.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Katō?
The wettest day measured in Katō between 1940 and 2025 was 27 October 1961, with 164 mm of rain in 24 hours.
What was the windiest day in Katō?
The windiest day measured in Katō between 1940 and 2025 was 27 September 1991, with winds reaching 65.6 km/h.
What is the warmest month in Katō?
The warmest month in Katō is August (26.7 °C on average); the coldest is January (3.4 °C).
How much does it rain in Katō?
Katō receives on average 1,443 mm of precipitation per year, spread over about 125 rainy days.
Is it sunny in Katō?
Katō 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 Katō?
The heaviest 24-hour snowfall measured in Katō between 1940 and 2025 was 15 February 1968, with 27.4 cm.
Are there tropical nights in Katō?
Yes: Katō has on average 76 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Katō?
In Katō, between 1940 and 2025, the highest apparent temperature reached 44.7 °C on 30 July 2025, and the lowest was -16.4 °C on 21 February 1968.
Compare Katō with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Katō