Imabari climate — normals and trends
Imabari (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 15.1 °C and it receives 1,660 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 (26.0 °C on average) and the coldest is January (4.6 °C). Rainfall peaks in June.
Imabari averages 14 frost days, 7 hot days (≥ 30 °C) and 154 rainy days per year.
Imabari has warmed by +1.7 °C between 1940 and 2025, or +0.20 °C per decade. This trend is statistically significant.
The number of frost days there went from about 24 to 4 per year over the period.
The hottest day of the period reached 32.4 °C (on 16 July 1994) and the coldest -6.5 °C (on 27 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
ImabariEhime
- coords
- 34.07°, 133.00°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.1°C
Average daily high
17.7°C
Average daily low
12.7°C
Annual rainfall
1,660mm
Sunshine / day
9.0h
Mean relative humidity
75%
Average peak wind
15.6km/h
Seasonal range
21.4°C
Frost days (< 0 °C)
14 d/yr
Hot days (≥ 30 °C)
7 d/yr
Rainy days (≥ 1 mm)
154 d/yr
Annual snowfall
21.5 cm
Average feels-like high
17.6 °C
Average feels-like low
11.7 °C
Average peak gust
35.8 km/h
Tropical nights (≥ 20 °C)
91 d/yr
Solar radiation
15.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.61 · 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
32.4 °C
16 July 1994
Coldest day
-6.5 °C
27 February 1981
Wettest day
167 mm
17 August 1975
Windiest day
64.5 km/h
27 September 1991
Strongest gust
168.5 km/h
7 September 2004
Hottest feels-like
39.6 °C
22 August 2024
Coldest feels-like
-13.4 °C
16 February 1977
Snowiest day
21.4 cm
15 February 1968
Sunniest day
14.0 h
9 June 1940
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 7.2 °C | +0.2 °C | 37 mm | -30 mm |
| Feb | 6.1 °C | -1.5 °C | 51 mm | -30 mm |
| Mar | 11.9 °C | +0.7 °C | 121 mm | +11 mm |
| Apr | 16.5 °C | +0.2 °C | 80 mm | -56 mm |
| May | 19.9 °C | -0.3 °C | 229 mm | +69 mm |
| Jun | 24.7 °C | +1.3 °C | 336 mm | +90 mm |
| Jul | 29.3 °C | +2.1 °C | 52 mm | -165 mm |
| Aug | 29.7 °C | +1.3 °C | 170 mm | +15 mm |
| Sep | 27.7 °C | +2.3 °C | 227 mm | +24 mm |
| Oct | 22.4 °C | +2.2 °C | 187 mm | +57 mm |
| Nov | 15.8 °C | +0.7 °C | 40 mm | -47 mm |
| Dec | 11.2 °C | +1.4 °C | 43 mm | -25 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 Imabari?
Imabari has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 15.1 °C and it receives 1,660 mm of precipitation per year.
What is the hottest day ever recorded in Imabari?
The hottest day measured in Imabari between 1940 and 2025 was 16 July 1994, reaching 32.4 °C.
What is the coldest day in Imabari?
The coldest day measured in Imabari between 1940 and 2025 was 27 February 1981, at -6.5 °C.
Does it snow in Imabari?
Yes. Imabari gets on average 21.5 cm of snow per year and has around 14 frost days.
Has the climate of Imabari warmed?
Yes: Imabari warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Imabari?
The wettest day measured in Imabari between 1940 and 2025 was 17 August 1975, with 167 mm of rain in 24 hours.
What was the windiest day in Imabari?
The windiest day measured in Imabari between 1940 and 2025 was 27 September 1991, with winds reaching 64.5 km/h.
What is the warmest month in Imabari?
The warmest month in Imabari is August (26.0 °C on average); the coldest is January (4.6 °C).
How much does it rain in Imabari?
Imabari receives on average 1,660 mm of precipitation per year, spread over about 154 rainy days.
Is it sunny in Imabari?
Imabari 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 Imabari?
The heaviest 24-hour snowfall measured in Imabari between 1940 and 2025 was 15 February 1968, with 21.4 cm.
Are there tropical nights in Imabari?
Yes: Imabari has on average 91 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Imabari?
In Imabari, between 1940 and 2025, the highest apparent temperature reached 39.6 °C on 22 August 2024, and the lowest was -13.4 °C on 16 February 1977.
Compare Imabari with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Imabari