Climate averages 1991–2020
Honmachi 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 Honmachi: daytime highs average 11.8°C and nights cool to about 5.1°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 83 mm of rain on roughly 9 days, which makes December a moderately wet month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 04 min on an average December day.
The nearest other city in this atlas is Kumamoto (35 km away). In December its highs average 11.2°C, 0.6°C cooler than Honmachi, with 84 mm of rain.
Among the 303 cities listed in Japan, Honmachi ranks joint 21st of 303 for the warmest December highs and joint 229th of 303 for the driest December (rainfall, lowest first). The mean December high of those 303 cities is 9.5°C; Honmachi is 2.3°C warmer than that mean.
From December to January, average highs fall by 2.2°C to 9.6°C, and monthly rainfall falls from 83 mm to 73 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
Honmachi climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 9.6°C3.2°C | 3.2°C | 73 | 9.4 | 10.310 h |
| February | 11.1°C3.8°C | 3.8°C | 92 | 10.0 | 11.011 h |
| March | 14.6°C6.9°C | 6.9°C | 133 | 12.4 | 12.012 h |
| April | 19.5°C11.4°C | 11.4°C | 151 | 11.8 | 13.013 h |
| May | 23.8°C16.1°C | 16.1°C | 174 | 11.8 | 13.814 h |
| June | 26.2°C20.2°C | 20.2°C | 428 | 18.3 | 14.214 h |
| July | 29.5°C23.9°C | 23.9°C | 347 | 18.2 | 14.114 h |
| August | 30.8°C24.6°C | 24.6°C | 162 | 16.1 | 13.313 h |
| September | 27.9°C21.5°C | 21.5°C | 174 | 13.2 | 12.412 h |
| October | 23.0°C15.8°C | 15.8°C | 100 | 8.2 | 11.411 h |
| November | 17.4°C10.3°C | 10.3°C | 96 | 8.8 | 10.511 h |
| December, selected | 11.8°C5.1°C | 5.1°C | 83 | 9.0 | 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
- Kumamoto in DecemberJapan · 35 kmHigh 11.2°C · Low 4.9°C · 84 mm rain
- Amakusa in DecemberJapan · 38 kmHigh 12.5°C · Low 7.5°C · 81 mm rain
- Ōmuta in DecemberJapan · 60 kmHigh 11.5°C · Low 5.6°C · 72 mm rain
- Isahaya in DecemberJapan · 64 kmHigh 11.6°C · Low 7.7°C · 92 mm rain
- Nagasaki in DecemberJapan · 72 kmHigh 12.2°C · Low 8.6°C · 92 mm rain
- Ōmura in DecemberJapan · 76 kmHigh 12.0°C · Low 8.0°C · 75 mm rain
- Aira in DecemberJapan · 81 kmHigh 12.7°C · Low 5.8°C · 87 mm rain
- Sendai, Japan in DecemberJapan · 82 kmHigh 13.3°C · Low 8.9°C · 102 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 Honmachi) is explained once on the Honmachi year overview and on the Sources, method and limits page.