Climate averages 1991–2020
Jōyō weather
in December.
A cool, moderately wet month: the 10th warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cool month in Jōyō: daytime highs average 9.8°C and nights cool to about 2.0°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 57 mm of rain on roughly 7 days, which makes December a moderately wet month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 9 h 52 min on an average December day.
The nearest other city in this atlas is Uji (5 km away). In December its highs average 10.1°C, about as warm as Jōyō, with 65 mm of rain.
Among the 303 cities listed in Japan, Jōyō ranks joint 196th of 303 for the warmest December highs and joint 55th of 303 for the driest December (rainfall, lowest first). The mean December high of those 303 cities is 9.5°C; Jōyō is 0.3°C warmer than that mean.
From December to January, average highs fall by 2.5°C to 7.3°C, and monthly rainfall rises from 57 mm to 58 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
Jōyō climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.3°C-0.2°C | -0.2°C | 58 | 6.4 | 10.110 h |
| February | 8.4°C-0.1°C | -0.1°C | 64 | 7.8 | 10.911 h |
| March | 12.2°C2.5°C | 2.5°C | 107 | 10.9 | 11.912 h |
| April | 17.6°C7.5°C | 7.5°C | 112 | 10.4 | 13.013 h |
| May | 22.4°C12.8°C | 12.8°C | 129 | 10.1 | 14.014 h |
| June | 25.7°C17.6°C | 17.6°C | 180 | 12.3 | 14.514 h |
| July | 29.1°C22.0°C | 22.0°C | 161 | 13.6 | 14.214 h |
| August | 30.7°C23.1°C | 23.1°C | 89 | 9.0 | 13.513 h |
| September | 26.8°C19.3°C | 19.3°C | 140 | 10.7 | 12.412 h |
| October | 20.9°C13.1°C | 13.1°C | 143 | 9.5 | 11.311 h |
| November | 15.3°C7.0°C | 7.0°C | 75 | 7.1 | 10.410 h |
| December, selected | 9.8°C2.0°C | 2.0°C | 57 | 6.6 | 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
- Uji in DecemberJapan · 5 kmHigh 10.1°C · Low 2.3°C · 65 mm rain
- Katano in DecemberJapan · 12 kmHigh 10.2°C · Low 2.4°C · 57 mm rain
- Kōtari in DecemberJapan · 13 kmHigh 10.3°C · Low 2.4°C · 65 mm rain
- Hirakata in DecemberJapan · 15 kmHigh 10.5°C · Low 2.9°C · 57 mm rain
- Nara-shi in DecemberJapan · 18 kmHigh 10.2°C · Low 2.2°C · 57 mm rain
- Ōtsu in DecemberJapan · 18 kmHigh 9.5°C · Low 1.8°C · 65 mm rain
- Kyoto in DecemberJapan · 20 kmHigh 10.0°C · Low 2.3°C · 65 mm rain
- Ikoma in DecemberJapan · 20 kmHigh 9.7°C · Low 1.8°C · 57 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 Jōyō) is explained once on the Jōyō year overview and on the Sources, method and limits page.
Hirakata, Nara-shi and Ikoma lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.