Hirado climate — normals and trends
Hirado (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 17.0 °C and it receives 1,724 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 (27.3 °C on average) and the coldest is January (7.5 °C). Rainfall peaks in June.
Hirado averages 1 frost days, 17 hot days (≥ 30 °C) and 137 rainy days per year.
Hirado has warmed by +1.8 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.
The hottest day of the period reached 34.8 °C (on 6 August 2023) and the coldest -2.8 °C (on 16 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
HiradoNagasaki
- coords
- 33.37°, 129.55°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
17.0°C
Average daily high
19.2°C
Average daily low
15.0°C
Annual rainfall
1,724mm
Sunshine / day
8.0h
Mean relative humidity
73%
Average peak wind
23.1km/h
Seasonal range
19.8°C
Frost days (< 0 °C)
1 d/yr
Hot days (≥ 30 °C)
17 d/yr
Rainy days (≥ 1 mm)
137 d/yr
Annual snowfall
3.6 cm
Average feels-like high
18.8 °C
Average feels-like low
13.4 °C
Average peak gust
40.6 km/h
Tropical nights (≥ 20 °C)
108 d/yr
Solar radiation
14.3 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
34.8 °C
6 August 2023
Coldest day
-2.8 °C
16 February 1977
Wettest day
215 mm
17 August 1949
Windiest day
101.3 km/h
31 August 1987
Strongest gust
216.4 km/h
31 August 1987
Hottest feels-like
41.7 °C
5 August 2024
Coldest feels-like
-11.4 °C
16 February 1977
Snowiest day
12.8 cm
15 February 1968
Sunniest day
13.6 h
14 June 1950
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 | 10.2 °C | +0.7 °C | 34 mm | -33 mm |
| Feb | 8.4 °C | -1.8 °C | 68 mm | -12 mm |
| Mar | 13.9 °C | +0.7 °C | 139 mm | +27 mm |
| Apr | 18.1 °C | +0.6 °C | 79 mm | -70 mm |
| May | 20.9 °C | -0.2 °C | 245 mm | +81 mm |
| Jun | 25.0 °C | +1.0 °C | 383 mm | +97 mm |
| Jul | 30.7 °C | +3.0 °C | 130 mm | -130 mm |
| Aug | 30.7 °C | +1.3 °C | 275 mm | +105 mm |
| Sep | 29.1 °C | +2.6 °C | 209 mm | +24 mm |
| Oct | 24.7 °C | +2.7 °C | 58 mm | -41 mm |
| Nov | 18.2 °C | +1.1 °C | 63 mm | -25 mm |
| Dec | 14.1 °C | +2.1 °C | 65 mm | -1 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 Hirado?
Hirado has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 17.0 °C and it receives 1,724 mm of precipitation per year.
What is the hottest day ever recorded in Hirado?
The hottest day measured in Hirado between 1940 and 2025 was 6 August 2023, reaching 34.8 °C.
What is the coldest day in Hirado?
The coldest day measured in Hirado between 1940 and 2025 was 16 February 1977, at -2.8 °C.
Does it snow in Hirado?
Yes. Hirado gets on average 3.6 cm of snow per year and has around 1 frost days.
Has the climate of Hirado warmed?
Yes: Hirado warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Hirado?
The wettest day measured in Hirado between 1940 and 2025 was 17 August 1949, with 215 mm of rain in 24 hours.
What was the windiest day in Hirado?
The windiest day measured in Hirado between 1940 and 2025 was 31 August 1987, with winds reaching 101.3 km/h.
What is the warmest month in Hirado?
The warmest month in Hirado is August (27.3 °C on average); the coldest is January (7.5 °C).
How much does it rain in Hirado?
Hirado receives on average 1,724 mm of precipitation per year, spread over about 137 rainy days.
Is it sunny in Hirado?
Hirado gets on average 8.0 hours of sunshine per day, roughly 2,920 hours per year over 1940-2025.
What is the biggest single-day snowfall in Hirado?
The heaviest 24-hour snowfall measured in Hirado between 1940 and 2025 was 15 February 1968, with 12.8 cm.
Are there tropical nights in Hirado?
Yes: Hirado has on average 108 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Hirado?
In Hirado, between 1940 and 2025, the highest apparent temperature reached 41.7 °C on 5 August 2024, and the lowest was -11.4 °C on 16 February 1977.
Compare Hirado with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Hirado