Climate averages 1991–2020
Osaka 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 Osaka: daytime highs average 10.6°C and nights cool to about 3.4°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 62 mm of rain on roughly 7 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 (8 km away). In December its highs average 10.6°C, about as warm as Osaka, with 62 mm of rain.
Among the 303 cities listed in Japan, Osaka ranks joint 112th of 303 for the warmest December highs and joint 102nd of 303 for the driest December (rainfall, lowest first). The mean December high of those 303 cities is 9.5°C; Osaka is 1.1°C warmer than that mean.
From December to January, average highs fall by 2.4°C to 8.2°C, and monthly rainfall falls from 62 mm to 57 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
Osaka climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.2°C1.1°C | 1.1°C | 57 | 5.9 | 10.110 h |
| February | 9.2°C1.1°C | 1.1°C | 65 | 7.4 | 10.911 h |
| March | 12.8°C3.8°C | 3.8°C | 110 | 10.7 | 11.912 h |
| April | 18.2°C8.8°C | 8.8°C | 118 | 10.4 | 13.013 h |
| May | 23.0°C14.1°C | 14.1°C | 139 | 10.6 | 14.014 h |
| June | 26.2°C18.8°C | 18.8°C | 189 | 13.0 | 14.414 h |
| July | 29.7°C23.1°C | 23.1°C | 183 | 14.6 | 14.214 h |
| August | 31.5°C24.3°C | 24.3°C | 110 | 11.6 | 13.513 h |
| September | 27.6°C20.4°C | 20.4°C | 163 | 11.9 | 12.412 h |
| October | 21.7°C14.3°C | 14.3°C | 151 | 9.5 | 11.311 h |
| November | 16.1°C8.5°C | 8.5°C | 81 | 7.2 | 10.410 h |
| December, selected | 10.6°C3.4°C | 3.4°C | 62 | 6.8 | 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 · 8 kmHigh 10.6°C · Low 3.1°C · 62 mm rain
- Toyonaka in DecemberJapan · 10 kmHigh 10.5°C · Low 3.1°C · 62 mm rain
- Yao in DecemberJapan · 12 kmHigh 10.2°C · Low 2.6°C · 68 mm rain
- Sakai in DecemberJapan · 13 kmHigh 10.3°C · Low 3.1°C · 68 mm rain
- Nishinomiya in DecemberJapan · 16 kmHigh 10.8°C · Low 3.9°C · 66 mm rain
- Takarazuka in DecemberJapan · 18 kmHigh 10.6°C · Low 3.6°C · 66 mm rain
- Ikoma in DecemberJapan · 18 kmHigh 9.7°C · Low 1.8°C · 57 mm rain
- Hirakata in DecemberJapan · 19 kmHigh 10.5°C · Low 2.9°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 Osaka) is explained once on the Osaka year overview and on the Sources, method and limits page.
Higashiosaka and Toyonaka lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.