Anan climate — normals and trends
Anan (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 17.2 °C and it receives 1,740 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 (26.6 °C on average) and the coldest is January (8.5 °C). Rainfall peaks in June.
Anan averages 0 frost days, 0 hot days (≥ 30 °C) and 136 rainy days per year.
Anan has warmed by +0.8 °C between 1940 and 2025, or +0.09 °C per decade. This trend is statistically significant.
The hottest day of the period reached 31.2 °C (on 17 August 2002) and the coldest -1.1 °C (on 26 February 1981).
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
AnanTokushima
- coords
- 33.92°, 134.65°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
17.2°C
Average daily high
18.6°C
Average daily low
16.0°C
Annual rainfall
1,740mm
Sunshine / day
9.0h
Mean relative humidity
73%
Average peak wind
31.5km/h
Seasonal range
18.1°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
136 d/yr
Annual snowfall
1.2 cm
Average feels-like high
17.9 °C
Average feels-like low
13.3 °C
Average peak gust
45.2 km/h
Tropical nights (≥ 20 °C)
127 d/yr
Solar radiation
14.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.8 °C
since 1940
+0.1 °C per decade · r² = 0.33 · 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
31.2 °C
17 August 2002
Coldest day
-1.1 °C
26 February 1981
Wettest day
251 mm
22 October 2017
Windiest day
117.3 km/h
26 September 1959
Strongest gust
174.6 km/h
26 September 1959
Hottest feels-like
38.2 °C
4 August 1998
Coldest feels-like
-10.7 °C
26 February 1981
Snowiest day
3.6 cm
26 February 1981
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 | 10.0 °C | -0.3 °C | 38 mm | -33 mm |
| Feb | 8.7 °C | -1.8 °C | 32 mm | -54 mm |
| Mar | 12.5 °C | -0.5 °C | 113 mm | -7 mm |
| Apr | 16.1 °C | -0.5 °C | 79 mm | -67 mm |
| May | 19.3 °C | -0.2 °C | 237 mm | +64 mm |
| Jun | 23.6 °C | +1.2 °C | 208 mm | -41 mm |
| Jul | 27.8 °C | +2.0 °C | 88 mm | -89 mm |
| Aug | 28.8 °C | +1.5 °C | 100 mm | -22 mm |
| Sep | 27.4 °C | +1.7 °C | 138 mm | -92 mm |
| Oct | 23.3 °C | +1.8 °C | 287 mm | +101 mm |
| Nov | 18.1 °C | +0.8 °C | 35 mm | -76 mm |
| Dec | 14.1 °C | +1.3 °C | 51 mm | -18 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 Anan?
Anan has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 17.2 °C and it receives 1,740 mm of precipitation per year.
What is the hottest day ever recorded in Anan?
The hottest day measured in Anan between 1940 and 2025 was 17 August 2002, reaching 31.2 °C.
What is the coldest day in Anan?
The coldest day measured in Anan between 1940 and 2025 was 26 February 1981, at -1.1 °C.
Does it snow in Anan?
Yes. Anan gets on average 1.2 cm of snow per year and has around 0 frost days.
Has the climate of Anan warmed?
Yes: Anan warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Anan?
The wettest day measured in Anan between 1940 and 2025 was 22 October 2017, with 251 mm of rain in 24 hours.
What was the windiest day in Anan?
The windiest day measured in Anan between 1940 and 2025 was 26 September 1959, with winds reaching 117.3 km/h.
What is the warmest month in Anan?
The warmest month in Anan is August (26.6 °C on average); the coldest is January (8.5 °C).
How much does it rain in Anan?
Anan receives on average 1,740 mm of precipitation per year, spread over about 136 rainy days.
Is it sunny in Anan?
Anan 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 Anan?
The heaviest 24-hour snowfall measured in Anan between 1940 and 2025 was 26 February 1981, with 3.6 cm.
Are there tropical nights in Anan?
Yes: Anan has on average 127 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Anan?
In Anan, between 1940 and 2025, the highest apparent temperature reached 38.2 °C on 4 August 1998, and the lowest was -10.7 °C on 26 February 1981.
Compare Anan with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Anan