Climate averages 1991–2020
Yao 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 Yao: daytime highs average 10.2°C and nights cool to about 2.6°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 68 mm of rain on roughly 8 days, which makes December a moderately wet month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 53 min on an average December day.
The nearest other city in this atlas is Higashiosaka (6 km away). In December its highs average 10.6°C, about as warm as Yao, with 62 mm of rain.
Among the 303 cities listed in Japan, Yao ranks joint 154th of 303 for the warmest December highs and joint 145th of 303 for the driest December (rainfall, lowest first). The mean December high of those 303 cities is 9.5°C; Yao is 0.7°C warmer than that mean.
From December to January, average highs fall by 2.4°C to 7.8°C, and monthly rainfall falls from 68 mm to 64 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
Yao climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.8°C0.5°C | 0.5°C | 64 | 8.2 | 10.110 h |
| February | 8.9°C0.6°C | 0.6°C | 71 | 8.8 | 10.911 h |
| March | 12.7°C3.2°C | 3.2°C | 112 | 11.6 | 11.912 h |
| April | 18.0°C8.2°C | 8.2°C | 114 | 10.4 | 13.013 h |
| May | 22.9°C13.5°C | 13.5°C | 132 | 10.4 | 14.014 h |
| June | 26.1°C18.3°C | 18.3°C | 198 | 13.6 | 14.414 h |
| July | 29.6°C22.7°C | 22.7°C | 172 | 13.8 | 14.214 h |
| August | 31.4°C23.9°C | 23.9°C | 100 | 10.3 | 13.513 h |
| September | 27.4°C20.0°C | 20.0°C | 158 | 11.8 | 12.412 h |
| October | 21.4°C13.7°C | 13.7°C | 156 | 10.0 | 11.311 h |
| November | 15.8°C7.6°C | 7.6°C | 84 | 8.0 | 10.410 h |
| December, selected | 10.2°C2.6°C | 2.6°C | 68 | 8.4 | 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
- Higashiosaka in DecemberJapan · 6 kmHigh 10.6°C · Low 3.1°C · 62 mm rain
- Ikoma in DecemberJapan · 12 kmHigh 9.7°C · Low 1.8°C · 57 mm rain
- Osaka in DecemberJapan · 12 kmHigh 10.6°C · Low 3.4°C · 62 mm rain
- Sakai in DecemberJapan · 13 kmHigh 10.3°C · Low 3.1°C · 68 mm rain
- Tondabayashichō in DecemberJapan · 13 kmHigh 10.0°C · Low 1.8°C · 68 mm rain
- Kashiba in DecemberJapan · 14 kmHigh 10.2°C · Low 1.5°C · 70 mm rain
- Yamatokōriyama in DecemberJapan · 16 kmHigh 10.2°C · Low 2.1°C · 70 mm rain
- Kawachi-Nagano in DecemberJapan · 20 kmHigh 9.6°C · Low 1.6°C · 68 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 Yao) is explained once on the Yao year overview and on the Sources, method and limits page.
Sakai, Tondabayashichō and Kawachi-Nagano lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.