Climate averages 1991–2020
Uruma weather
in December.
A mild, wet month: the 9th warmest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a mild month in Uruma: daytime highs average 20.2°C and nights cool to about 18.1°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 110 mm of rain on roughly 11 days, which makes December a wet month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 31 min on an average December day.
The nearest other city in this atlas is Okinawa (7 km away). In December its highs average 19.7°C, 0.5°C cooler than Uruma, with 113 mm of rain.
Among the 303 cities listed in Japan, Uruma ranks 2nd of 303 for the warmest December highs and 271st of 303 for the driest December (rainfall, lowest first). The mean December high of those 303 cities is 9.5°C; Uruma is 10.7°C warmer than that mean.
From December to January, average highs fall by 1.7°C to 18.5°C, and monthly rainfall falls from 110 mm to 103 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
Uruma climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 18.5°C16.2°C | 16.2°C | 103 | 12.0 | 10.711 h |
| February | 18.7°C16.2°C | 16.2°C | 99 | 11.7 | 11.211 h |
| March | 20.1°C17.5°C | 17.5°C | 134 | 13.2 | 12.012 h |
| April | 22.1°C19.8°C | 19.8°C | 158 | 13.2 | 12.813 h |
| May | 24.5°C22.5°C | 22.5°C | 207 | 14.1 | 13.413 h |
| June | 27.1°C25.4°C | 25.4°C | 224 | 15.5 | 13.814 h |
| July | 28.9°C27.1°C | 27.1°C | 124 | 10.8 | 13.614 h |
| August | 29.0°C27.1°C | 27.1°C | 175 | 14.4 | 13.113 h |
| September | 28.0°C26.2°C | 26.2°C | 188 | 13.4 | 12.312 h |
| October | 25.9°C24.2°C | 24.2°C | 139 | 11.8 | 11.612 h |
| November | 23.3°C21.5°C | 21.5°C | 100 | 10.7 | 10.911 h |
| December, selected | 20.2°C18.1°C | 18.1°C | 110 | 11.3 | 10.511 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
- Okinawa in DecemberJapan · 7 kmHigh 19.7°C · Low 17.5°C · 113 mm rain
- Naha in DecemberJapan · 26 kmHigh 20.6°C · Low 18.5°C · 113 mm rain
- Keelung in DecemberTaiwan · 628 kmHigh 19.5°C · Low 16.5°C · 186 mm rain
- Kanoya in DecemberJapan · 628 kmHigh 13.8°C · Low 7.3°C · 83 mm rain
- Kagoshima in DecemberJapan · 634 kmHigh 13.5°C · Low 8.0°C · 85 mm rain
- Yilan, Taiwan in DecemberTaiwan · 638 kmHigh 18.8°C · Low 15.1°C · 243 mm rain
- Neihu in DecemberTaiwan · 644 kmHigh 19.4°C · Low 16.0°C · 108 mm rain
- Sendai, Japan in DecemberJapan · 650 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 Uruma) is explained once on the Uruma year overview and on the Sources, method and limits page.