Imabari climate
Imabari (Japan) has a humid subtropical climate (Köppen Cfa). The average temperature over the year is 17 °C62 °F, and about 1,699 mm67 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Imabari climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 948 | 337 | 643 | 532.1 |
| Feb | 1151 | 338 | 745 | 793.1 |
| Mar | 1457 | 542 | 1050 | 1124.4 |
| Apr | 1967 | 1050 | 1558 | 1335.2 |
| May | 2475 | 1559 | 1967 | 1646.5 |
| Jun | 2781 | 2067 | 2374 | 2489.8 |
| Jul | 3187 | 2475 | 2781 | 25810 |
| Aug | 3289 | 2576 | 2883 | 1576.2 |
| Sep | 2883 | 2171 | 2577 | 2048.0 |
| Oct | 2373 | 1660 | 1967 | 1375.4 |
| Nov | 1763 | 1050 | 1457 | 803.1 |
| Dec | 1152 | 541 | 847 | 732.9 |
| Year | 3289 | 337 | 1762 | 1,69967 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 81% | 72% | 2.3 | 10:07 |
| Feb | 79% | 71% | 3.0 | 10:55 |
| Mar | 77% | 65% | 4.0 | 11:53 |
| Apr | 76% | 64% | 4.9 | 12:00 |
| May | 77% | 67% | 5.4 | 13:55 |
| Jun | 82% | 79% | 4.9 | 14:25 |
| Jul | 84% | 72% | 5.1 | 14:13 |
| Aug | 81% | 64% | 5.3 | 13:25 |
| Sep | 82% | 70% | 4.2 | 12:20 |
| Oct | 80% | 62% | 3.5 | 11:16 |
| Nov | 80% | 62% | 2.6 | 10:20 |
| Dec | 81% | 69% | 2.1 | 9:53 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Imabari is like
The warmest month is August, with an average high of 32 °C89 °F and a low of 25 °C76 °F. The coldest is January, when highs average 9 °C48 °F and lows 3 °C37 °F. Seasons are strongly marked: the warmest month is on average 22.3 °C40.1 °F warmer than the coldest.
It is wet, with about 1,699 mm67 in of precipitation per year. The wettest three-month stretch is May–July, which brings 39% of the annual total. The wettest month is July (258 mm10 in), the driest is January (53 mm2.1 in).
Relative humidity ranges from 76% in April to 84% in July. The clearest skies (lowest average cloud amount, 62%) are typical of October. Average wind speed near the ground ranges from 4 km/h (3 mph) in June to 8 km/h (5 mph) in January. Daylight lasts from about 9.9 hours in December to 14.4 hours in June.
Best time to visit Imabari
Based on these averages, the most comfortable months for sightseeing and outdoor activities are October and November: average highs of 17 °C63 °F to 23 °C73 °F with 80 mm3.1 in to 137 mm5.4 in of precipitation per month.
The most challenging month is July, which is hot, with average highs of 31 °C87 °F, very wet (258 mm10 in) and humid (84% relative humidity).
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Imabari
- Winter (December–February) — highs 948 to 11 °C52 °F, lows 337 to 5 °C41 °F, about 68 mm2.7 in of precipitation a month. Pack a warm coat, layers and closed shoes.
- Spring (March–May) — highs 1457 to 24 °C75 °F, lows 542 to 15 °C59 °F, about 136 mm5.4 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an umbrella or light rain jacket.
- Summer (June–August) — highs 2781 to 32 °C89 °F, lows 2067 to 25 °C76 °F, about 221 mm8.7 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and a good rain jacket or umbrella and quick-drying shoes.
- Autumn (September–November) — highs 1763 to 28 °C83 °F, lows 1050 to 21 °C71 °F, about 140 mm5.5 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an umbrella or light rain jacket.
How Imabari compares
Compared with Matsuyama, about 34 km to the southwest, Imabari has practically the same average temperature and receives a similar amount of precipitation. The difference is largest in July (1.2 °C2.2 °F warmer).
Of the 111 places in Japan covered by World Climates, Imabari is the 22nd warmest by annual mean temperature and the 52nd wettest by annual precipitation. See all of them on the Japan climate page.
Places in other countries with the most similar temperature and rainfall pattern: Chongming (China, Cfa), Ningbo (China, Cfa) and Cixi (China, Cfa).
Nearby places
- Niihama 31 km · 17 °C62 °F · 1,699 mm67 in
- Matsuyama 34 km · 17 °C62 °F · 1,621 mm64 in
- Kure 44 km · 16 °C61 °F · 1,621 mm64 in
- Shinagawa 48 km · 14 °C57 °F · 2,059 mm81 in
- Fukuyama 57 km · 16 °C61 °F · 1,526 mm60 in
- Hiroshima 62 km · 15 °C60 °F · 1,556 mm61 in
- Kochi 76 km · 18 °C64 °F · 2,190 mm86 in
- Takamatsu 101 km · 16 °C61 °F · 1,466 mm58 in
Frequently asked questions
What is the warmest month in Imabari?
August is the warmest month in Imabari, with an average high of 32 °C (89 °F) and an average low of 25 °C (76 °F).
What is the coldest month in Imabari?
January is the coldest month, with an average high of 9 °C (48 °F) and an average low of 3 °C (37 °F).
When does it rain the most in Imabari?
July is the wettest month with about 258 mm (10.2 in) of precipitation; January is the driest with about 53 mm (2.1 in).
What is the best time to visit Imabari?
Judging by long-term averages, the most comfortable months are October and November.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 283 m, while Imabari lies at about 6 m. Temperatures on this page were therefore adjusted by +1.8 °C3.2 °F using the standard lapse rate of 6.5 °C per 1,000 m.