Hiragi climate — normals and trends
Hiragi (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 15.6 °C and it receives 1,541 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 (5.4 °C). Rainfall peaks in June.
Hiragi averages 7 frost days, 21 hot days (≥ 30 °C) and 146 rainy days per year.
Hiragi has warmed by +1.8 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.
The number of frost days there went from about 13 to 1 per year over the period.
The hottest day of the period reached 34.0 °C (on 3 September 2020) and the coldest -5.4 °C (on 16 February 1951).
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
HiragiKagawa
- coords
- 34.27°, 134.13°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.6°C
Average daily high
18.4°C
Average daily low
12.9°C
Annual rainfall
1,541mm
Sunshine / day
9.0h
Mean relative humidity
73%
Average peak wind
17.0km/h
Seasonal range
21.3°C
Frost days (< 0 °C)
7 d/yr
Hot days (≥ 30 °C)
21 d/yr
Rainy days (≥ 1 mm)
146 d/yr
Annual snowfall
11.1 cm
Average feels-like high
18.2 °C
Average feels-like low
11.8 °C
Average peak gust
37.3 km/h
Tropical nights (≥ 20 °C)
93 d/yr
Solar radiation
14.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.63 · 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
34.0 °C
3 September 2020
Coldest day
-5.4 °C
16 February 1951
Wettest day
206 mm
27 October 1961
Windiest day
62.9 km/h
26 September 1959
Strongest gust
156.2 km/h
4 September 1993
Hottest feels-like
41.6 °C
4 August 2025
Coldest feels-like
-13.0 °C
26 February 1981
Snowiest day
23.6 cm
15 February 1968
Sunniest day
14.0 h
28 May 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 | 8.2 °C | +0.2 °C | 27 mm | -36 mm |
| Feb | 7.2 °C | -1.3 °C | 35 mm | -38 mm |
| Mar | 12.2 °C | +0.3 °C | 85 mm | -13 mm |
| Apr | 17.3 °C | +0.3 °C | 65 mm | -54 mm |
| May | 21.0 °C | +0.1 °C | 224 mm | +80 mm |
| Jun | 25.7 °C | +1.7 °C | 220 mm | +2 mm |
| Jul | 30.8 °C | +2.8 °C | 31 mm | -164 mm |
| Aug | 31.3 °C | +2.0 °C | 155 mm | +18 mm |
| Sep | 28.8 °C | +2.9 °C | 155 mm | -51 mm |
| Oct | 22.8 °C | +2.1 °C | 221 mm | +76 mm |
| Nov | 16.3 °C | +0.7 °C | 30 mm | -56 mm |
| Dec | 11.8 °C | +1.2 °C | 47 mm | -12 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 Hiragi?
Hiragi has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 15.6 °C and it receives 1,541 mm of precipitation per year.
What is the hottest day ever recorded in Hiragi?
The hottest day measured in Hiragi between 1940 and 2025 was 3 September 2020, reaching 34.0 °C.
What is the coldest day in Hiragi?
The coldest day measured in Hiragi between 1940 and 2025 was 16 February 1951, at -5.4 °C.
Does it snow in Hiragi?
Yes. Hiragi gets on average 11.1 cm of snow per year and has around 7 frost days.
Has the climate of Hiragi warmed?
Yes: Hiragi warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Hiragi?
The wettest day measured in Hiragi between 1940 and 2025 was 27 October 1961, with 206 mm of rain in 24 hours.
What was the windiest day in Hiragi?
The windiest day measured in Hiragi between 1940 and 2025 was 26 September 1959, with winds reaching 62.9 km/h.
What is the warmest month in Hiragi?
The warmest month in Hiragi is August (26.7 °C on average); the coldest is January (5.4 °C).
How much does it rain in Hiragi?
Hiragi receives on average 1,541 mm of precipitation per year, spread over about 146 rainy days.
Is it sunny in Hiragi?
Hiragi gets on average 9.0 hours of sunshine per day, roughly 3,285 hours per year over 1940-2025.
What is the biggest single-day snowfall in Hiragi?
The heaviest 24-hour snowfall measured in Hiragi between 1940 and 2025 was 15 February 1968, with 23.6 cm.
Are there tropical nights in Hiragi?
Yes: Hiragi has on average 93 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Hiragi?
In Hiragi, between 1940 and 2025, the highest apparent temperature reached 41.6 °C on 4 August 2025, and the lowest was -13.0 °C on 26 February 1981.
Compare Hiragi with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Hiragi