Climate averages 1991–2020
Sendai, Japan weather
in December.
A cool, 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 Sendai, Japan: daytime highs average 13.3°C and nights cool to about 8.9°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 102 mm of rain on roughly 11 days, which makes December a wet month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 07 min on an average December day.
The nearest other city in this atlas is Aira (28 km away). In December its highs average 12.7°C, 0.6°C cooler than Sendai, Japan, with 87 mm of rain.
Among the 303 cities listed in Japan, Sendai, Japan ranks 8th of 303 for the warmest December highs and 264th of 303 for the driest December (rainfall, lowest first). The mean December high of those 303 cities is 9.5°C; Sendai, Japan is 3.8°C warmer than that mean.
From December to January, average highs fall by 2.2°C to 11.1°C, and monthly rainfall falls from 102 mm to 98 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
Sendai, Japan climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 11.1°C6.8°C | 6.8°C | 98 | 12.3 | 10.310 h |
| February | 12.0°C7.0°C | 7.0°C | 115 | 11.3 | 11.011 h |
| March | 15.0°C9.2°C | 9.2°C | 161 | 13.4 | 12.012 h |
| April | 19.1°C12.8°C | 12.8°C | 186 | 11.7 | 12.913 h |
| May | 23.0°C16.9°C | 16.9°C | 205 | 11.3 | 13.814 h |
| June | 25.6°C20.8°C | 20.8°C | 500 | 18.5 | 14.214 h |
| July | 29.1°C24.6°C | 24.6°C | 324 | 17.6 | 14.014 h |
| August | 30.1°C25.5°C | 25.5°C | 166 | 15.7 | 13.313 h |
| September | 27.9°C23.1°C | 23.1°C | 198 | 13.1 | 12.412 h |
| October | 23.6°C18.5°C | 18.5°C | 109 | 8.6 | 11.411 h |
| November | 18.4°C13.6°C | 13.6°C | 122 | 9.3 | 10.611 h |
| December, selected | 13.3°C8.9°C | 8.9°C | 102 | 10.6 | 10.110 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
- Aira in DecemberJapan · 28 kmHigh 12.7°C · Low 5.8°C · 87 mm rain
- Kagoshima in DecemberJapan · 37 kmHigh 13.5°C · Low 8.0°C · 85 mm rain
- Kirishima in DecemberJapan · 45 kmHigh 13.4°C · Low 5.1°C · 81 mm rain
- Kanoya in DecemberJapan · 71 kmHigh 13.8°C · Low 7.3°C · 83 mm rain
- Amakusa in DecemberJapan · 72 kmHigh 12.5°C · Low 7.5°C · 81 mm rain
- Miyakonojō in DecemberJapan · 73 kmHigh 13.1°C · Low 5.1°C · 81 mm rain
- Honmachi in DecemberJapan · 82 kmHigh 11.8°C · Low 5.1°C · 83 mm rain
- Miyazaki in DecemberJapan · 106 kmHigh 13.6°C · Low 7.4°C · 80 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 Sendai) is explained once on the Sendai, Japan year overview and on the Sources, method and limits page.