Buzen climate — normals and trends
Buzen (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 15.5 °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 (26.9 °C on average) and the coldest is January (4.3 °C). Rainfall peaks in June.
Buzen averages 17 frost days, 34 hot days (≥ 30 °C) and 141 rainy days per year.
Buzen has warmed by +2.7 °C between 1940 and 2025, or +0.32 °C per decade. This trend is statistically significant.
The number of frost days there went from about 30 to 4 per year over the period.
The hottest day of the period reached 36.1 °C (on 22 August 2024) and the coldest -9.3 °C (on 5 February 1940).
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
BuzenFukuoka
- coords
- 33.61°, 131.13°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.5°C
Average daily high
18.7°C
Average daily low
12.7°C
Annual rainfall
1,541mm
Sunshine / day
8.3h
Mean relative humidity
75%
Average peak wind
14.0km/h
Seasonal range
22.6°C
Frost days (< 0 °C)
17 d/yr
Hot days (≥ 30 °C)
34 d/yr
Rainy days (≥ 1 mm)
141 d/yr
Annual snowfall
15.8 cm
Average feels-like high
18.7 °C
Average feels-like low
12.1 °C
Average peak gust
34.5 km/h
Tropical nights (≥ 20 °C)
94 d/yr
Solar radiation
14.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.7 °C
since 1940
+0.3 °C per decade · r² = 0.75 · 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
36.1 °C
22 August 2024
Coldest day
-9.3 °C
5 February 1940
Wettest day
231 mm
17 September 1945
Windiest day
54.6 km/h
27 September 1991
Strongest gust
159.5 km/h
7 September 2004
Hottest feels-like
42.8 °C
3 August 2024
Coldest feels-like
-14.3 °C
16 February 1977
Snowiest day
35.1 cm
15 February 1968
Sunniest day
13.8 h
21 June 2021
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 | 7.9 °C | +0.5 °C | 21 mm | -35 mm |
| Feb | 7.0 °C | -1.3 °C | 58 mm | -18 mm |
| Mar | 13.6 °C | +1.5 °C | 129 mm | +25 mm |
| Apr | 18.5 °C | +0.9 °C | 67 mm | -60 mm |
| May | 22.1 °C | 0.0 °C | 267 mm | +114 mm |
| Jun | 27.2 °C | +2.1 °C | 365 mm | +103 mm |
| Jul | 31.4 °C | +2.3 °C | 56 mm | -163 mm |
| Aug | 31.5 °C | +1.6 °C | 192 mm | +44 mm |
| Sep | 29.2 °C | +2.9 °C | 199 mm | +25 mm |
| Oct | 23.7 °C | +2.7 °C | 91 mm | -10 mm |
| Nov | 16.7 °C | +1.0 °C | 25 mm | -43 mm |
| Dec | 11.9 °C | +1.8 °C | 55 mm | +3 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 Buzen?
Buzen has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 15.5 °C and it receives 1,541 mm of precipitation per year.
What is the hottest day ever recorded in Buzen?
The hottest day measured in Buzen between 1940 and 2025 was 22 August 2024, reaching 36.1 °C.
What is the coldest day in Buzen?
The coldest day measured in Buzen between 1940 and 2025 was 5 February 1940, at -9.3 °C.
Does it snow in Buzen?
Yes. Buzen gets on average 15.8 cm of snow per year and has around 17 frost days.
Has the climate of Buzen warmed?
Yes: Buzen warmed by +2.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Buzen?
The wettest day measured in Buzen between 1940 and 2025 was 17 September 1945, with 231 mm of rain in 24 hours.
What was the windiest day in Buzen?
The windiest day measured in Buzen between 1940 and 2025 was 27 September 1991, with winds reaching 54.6 km/h.
What is the warmest month in Buzen?
The warmest month in Buzen is August (26.9 °C on average); the coldest is January (4.3 °C).
How much does it rain in Buzen?
Buzen receives on average 1,541 mm of precipitation per year, spread over about 141 rainy days.
Is it sunny in Buzen?
Buzen gets on average 8.3 hours of sunshine per day, roughly 3,030 hours per year over 1940-2025.
What is the biggest single-day snowfall in Buzen?
The heaviest 24-hour snowfall measured in Buzen between 1940 and 2025 was 15 February 1968, with 35.1 cm.
Are there tropical nights in Buzen?
Yes: Buzen has on average 94 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Buzen?
In Buzen, between 1940 and 2025, the highest apparent temperature reached 42.8 °C on 3 August 2024, and the lowest was -14.3 °C on 16 February 1977.
Compare Buzen with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Buzen