Kasuga climate — normals and trends
Kasuga (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 15.8 °C and it receives 1,704 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 (27.2 °C on average) and the coldest is January (4.9 °C). Rainfall peaks in June.
Kasuga averages 26 frost days, 46 hot days (≥ 30 °C) and 147 rainy days per year.
Kasuga 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 43 to 9 per year over the period.
The hottest day of the period reached 37.6 °C (on 17 July 1994) and the coldest -10.8 °C (on 18 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
KasugaFukuoka
- coords
- 33.53°, 130.46°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.8°C
Average daily high
19.9°C
Average daily low
11.9°C
Annual rainfall
1,704mm
Sunshine / day
8.1h
Mean relative humidity
75%
Average peak wind
13.4km/h
Seasonal range
22.3°C
Frost days (< 0 °C)
26 d/yr
Hot days (≥ 30 °C)
46 d/yr
Rainy days (≥ 1 mm)
147 d/yr
Annual snowfall
11.6 cm
Average feels-like high
20.2 °C
Average feels-like low
11.5 °C
Average peak gust
35.1 km/h
Tropical nights (≥ 20 °C)
89 d/yr
Solar radiation
14.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.8 °C
since 1940
+0.3 °C per decade · r² = 0.76 · 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
37.6 °C
17 July 1994
Coldest day
-10.8 °C
18 February 1968
Wettest day
190 mm
2 June 1988
Windiest day
55.6 km/h
10 September 1956
Strongest gust
184.3 km/h
31 August 1987
Hottest feels-like
44.4 °C
5 August 2024
Coldest feels-like
-15.2 °C
18 February 1968
Snowiest day
28.1 cm
15 February 1968
Sunniest day
13.8 h
29 May 1942
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 9.3 °C | +0.7 °C | 28 mm | -34 mm |
| Feb | 8.0 °C | -1.7 °C | 48 mm | -29 mm |
| Mar | 15.0 °C | +1.5 °C | 128 mm | +25 mm |
| Apr | 20.1 °C | +1.2 °C | 58 mm | -75 mm |
| May | 23.1 °C | -0.2 °C | 268 mm | +111 mm |
| Jun | 27.6 °C | +1.5 °C | 399 mm | +106 mm |
| Jul | 33.4 °C | +3.6 °C | 105 mm | -182 mm |
| Aug | 32.4 °C | +1.3 °C | 253 mm | +77 mm |
| Sep | 30.1 °C | +2.6 °C | 196 mm | +14 mm |
| Oct | 25.1 °C | +2.7 °C | 64 mm | -32 mm |
| Nov | 17.9 °C | +1.0 °C | 26 mm | -52 mm |
| Dec | 13.1 °C | +1.9 °C | 50 mm | -11 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 Kasuga?
Kasuga has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 15.8 °C and it receives 1,704 mm of precipitation per year.
What is the hottest day ever recorded in Kasuga?
The hottest day measured in Kasuga between 1940 and 2025 was 17 July 1994, reaching 37.6 °C.
What is the coldest day in Kasuga?
The coldest day measured in Kasuga between 1940 and 2025 was 18 February 1968, at -10.8 °C.
Does it snow in Kasuga?
Yes. Kasuga gets on average 11.6 cm of snow per year and has around 26 frost days.
Has the climate of Kasuga warmed?
Yes: Kasuga warmed by +2.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Kasuga?
The wettest day measured in Kasuga between 1940 and 2025 was 2 June 1988, with 190 mm of rain in 24 hours.
What was the windiest day in Kasuga?
The windiest day measured in Kasuga between 1940 and 2025 was 10 September 1956, with winds reaching 55.6 km/h.
What is the warmest month in Kasuga?
The warmest month in Kasuga is August (27.2 °C on average); the coldest is January (4.9 °C).
How much does it rain in Kasuga?
Kasuga receives on average 1,704 mm of precipitation per year, spread over about 147 rainy days.
Is it sunny in Kasuga?
Kasuga 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 Kasuga?
The heaviest 24-hour snowfall measured in Kasuga between 1940 and 2025 was 15 February 1968, with 28.1 cm.
Are there tropical nights in Kasuga?
Yes: Kasuga has on average 89 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Kasuga?
In Kasuga, between 1940 and 2025, the highest apparent temperature reached 44.4 °C on 5 August 2024, and the lowest was -15.2 °C on 18 February 1968.
Compare Kasuga with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Kasuga