Climate averages 1991–2020
Imabari weather
in December.
A cool, moderately wet month: the 10th warmest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cool month in Imabari: daytime highs average 11.0°C and nights cool to about 6.5°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 79 mm of rain on roughly 11 days, which makes December a moderately wet month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 56 min on an average December day.
The nearest other city in this atlas is Saijō (24 km away). In December its highs average 11.3°C, about as warm as Imabari, with 90 mm of rain.
Among the 303 cities listed in Japan, Imabari ranks joint 68th of 303 for the warmest December highs and 214th of 303 for the driest December (rainfall, lowest first). The mean December high of those 303 cities is 9.5°C; Imabari is 1.5°C warmer than that mean.
From December to January, average highs fall by 2.4°C to 8.5°C, and monthly rainfall falls from 79 mm to 66 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Imabari climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.5°C4.1°C | 4.1°C | 66 | 11.1 | 10.210 h |
| February | 9.5°C4.1°C | 4.1°C | 80 | 10.8 | 10.911 h |
| March | 12.8°C6.6°C | 6.6°C | 118 | 12.3 | 12.012 h |
| April | 17.5°C11.0°C | 11.0°C | 132 | 11.1 | 13.013 h |
| May | 21.8°C15.6°C | 15.6°C | 156 | 11.1 | 13.914 h |
| June | 24.9°C19.8°C | 19.8°C | 249 | 14.8 | 14.414 h |
| July | 28.5°C24.0°C | 24.0°C | 225 | 15.4 | 14.214 h |
| August | 29.7°C25.0°C | 25.0°C | 142 | 13.5 | 13.413 h |
| September | 26.5°C21.9°C | 21.9°C | 196 | 13.2 | 12.412 h |
| October | 21.4°C16.8°C | 16.8°C | 148 | 10.0 | 11.411 h |
| November | 16.2°C11.4°C | 11.4°C | 82 | 9.2 | 10.410 h |
| December, selected | 11.0°C6.5°C | 6.5°C | 79 | 11.0 | 9.910 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Saijō in DecemberJapan · 24 kmHigh 11.3°C · Low 5.3°C · 90 mm rain
- Niihama in DecemberJapan · 31 kmHigh 11.4°C · Low 5.5°C · 90 mm rain
- Matsuyama in DecemberJapan · 34 kmHigh 11.3°C · Low 5.4°C · 83 mm rain
- Mihara in DecemberJapan · 37 kmHigh 10.9°C · Low 3.6°C · 50 mm rain
- Onomichi in DecemberJapan · 43 kmHigh 10.7°C · Low 3.8°C · 47 mm rain
- Kure in DecemberJapan · 44 kmHigh 10.6°C · Low 5.8°C · 61 mm rain
- Higashihiroshima in DecemberJapan · 45 kmHigh 9.7°C · Low 2.6°C · 53 mm rain
- Shinagawa in DecemberJapan · 48 kmHigh 9.7°C · Low 2.9°C · 84 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Imabari) is explained once on the Imabari year overview and on the Sources, method and limits page.