Rifu climate — normals and trends
Rifu (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 12.4 °C and it receives 1,309 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 (23.9 °C on average) and the coldest is January (2.0 °C). Rainfall peaks in September.
Rifu averages 45 frost days, 1 hot days (≥ 30 °C) and 140 rainy days per year.
Rifu has warmed by +2.1 °C between 1940 and 2025, or +0.25 °C per decade. This trend is statistically significant.
The number of frost days there went from about 69 to 21 per year over the period.
The hottest day of the period reached 32.5 °C (on 28 August 2023) and the coldest -11.8 °C (on 9 February 1942).
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
RifuMiyagi
- coords
- 38.33°, 140.98°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
12.4°C
Average daily high
14.8°C
Average daily low
9.9°C
Annual rainfall
1,309mm
Sunshine / day
8.4h
Mean relative humidity
77%
Average peak wind
21.1km/h
Seasonal range
21.9°C
Frost days (< 0 °C)
45 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
140 d/yr
Annual snowfall
41.7 cm
Average feels-like high
13.6 °C
Average feels-like low
7.9 °C
Average peak gust
36.7 km/h
Tropical nights (≥ 20 °C)
56 d/yr
Solar radiation
13.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.1 °C
since 1940
+0.3 °C per decade · r² = 0.52 · 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
32.5 °C
28 August 2023
Coldest day
-11.8 °C
9 February 1942
Wettest day
159 mm
28 June 1966
Windiest day
68.3 km/h
27 September 1958
Strongest gust
134.3 km/h
27 September 1959
Hottest feels-like
40.6 °C
31 July 2023
Coldest feels-like
-17.4 °C
9 February 1942
Snowiest day
22.5 cm
12 March 1969
Sunniest day
14.4 h
19 June 2007
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 | 6.6 °C | +1.8 °C | 45 mm | -6 mm |
| Feb | 5.9 °C | +0.8 °C | 23 mm | -31 mm |
| Mar | 10.4 °C | +2.3 °C | 81 mm | -5 mm |
| Apr | 13.8 °C | +1.0 °C | 108 mm | +12 mm |
| May | 17.5 °C | +0.8 °C | 212 mm | +103 mm |
| Jun | 23.7 °C | +4.0 °C | 83 mm | -55 mm |
| Jul | 27.7 °C | +4.3 °C | 71 mm | -102 mm |
| Aug | 28.9 °C | +3.2 °C | 191 mm | +38 mm |
| Sep | 25.8 °C | +2.8 °C | 142 mm | -43 mm |
| Oct | 18.9 °C | +0.7 °C | 169 mm | +31 mm |
| Nov | 13.8 °C | +0.9 °C | 51 mm | -19 mm |
| Dec | 9.1 °C | +1.5 °C | 69 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 Rifu?
Rifu has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 12.4 °C and it receives 1,309 mm of precipitation per year.
What is the hottest day ever recorded in Rifu?
The hottest day measured in Rifu between 1940 and 2025 was 28 August 2023, reaching 32.5 °C.
What is the coldest day in Rifu?
The coldest day measured in Rifu between 1940 and 2025 was 9 February 1942, at -11.8 °C.
Does it snow in Rifu?
Yes. Rifu gets on average 41.7 cm of snow per year and has around 45 frost days.
Has the climate of Rifu warmed?
Yes: Rifu warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Rifu?
The wettest day measured in Rifu between 1940 and 2025 was 28 June 1966, with 159 mm of rain in 24 hours.
What was the windiest day in Rifu?
The windiest day measured in Rifu between 1940 and 2025 was 27 September 1958, with winds reaching 68.3 km/h.
What is the warmest month in Rifu?
The warmest month in Rifu is August (23.9 °C on average); the coldest is January (2.0 °C).
How much does it rain in Rifu?
Rifu receives on average 1,309 mm of precipitation per year, spread over about 140 rainy days.
Is it sunny in Rifu?
Rifu gets on average 8.4 hours of sunshine per day, roughly 3,066 hours per year over 1940-2025.
What is the biggest single-day snowfall in Rifu?
The heaviest 24-hour snowfall measured in Rifu between 1940 and 2025 was 12 March 1969, with 22.5 cm.
Are there tropical nights in Rifu?
Yes: Rifu has on average 56 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Rifu?
In Rifu, between 1940 and 2025, the highest apparent temperature reached 40.6 °C on 31 July 2023, and the lowest was -17.4 °C on 9 February 1942.
Compare Rifu with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Rifu