Climate averages 1991–2020
Naha 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 Naha: daytime highs average 20.6°C and nights cool to about 18.5°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 113 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 32 min on an average December day.
The nearest other city in this atlas is Okinawa (18 km away). In December its highs average 19.7°C, 0.9°C cooler than Naha, with 113 mm of rain.
Among the 303 cities listed in Japan, Naha ranks 1st of 303 for the warmest December highs and joint 273rd of 303 for the driest December (rainfall, lowest first). The mean December high of those 303 cities is 9.5°C; Naha is 11.1°C warmer than that mean.
From December to January, average highs fall by 1.7°C to 18.9°C, and monthly rainfall falls from 113 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
Naha climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 18.9°C16.6°C | 16.6°C | 103 | 11.7 | 10.711 h |
| February | 19.0°C16.6°C | 16.6°C | 96 | 11.5 | 11.311 h |
| March | 20.5°C17.9°C | 17.9°C | 128 | 12.7 | 12.012 h |
| April | 22.5°C20.1°C | 20.1°C | 150 | 12.7 | 12.813 h |
| May | 24.9°C22.8°C | 22.8°C | 207 | 13.8 | 13.413 h |
| June | 27.5°C25.7°C | 25.7°C | 218 | 15.8 | 13.814 h |
| July | 29.2°C27.3°C | 27.3°C | 126 | 11.3 | 13.614 h |
| August | 29.2°C27.3°C | 27.3°C | 178 | 14.8 | 13.113 h |
| September | 28.3°C26.4°C | 26.4°C | 199 | 14.2 | 12.312 h |
| October | 26.2°C24.5°C | 24.5°C | 141 | 11.6 | 11.612 h |
| November | 23.7°C21.8°C | 21.8°C | 101 | 10.5 | 10.911 h |
| December, selected | 20.6°C18.5°C | 18.5°C | 113 | 11.2 | 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 · 18 kmHigh 19.7°C · Low 17.5°C · 113 mm rain
- Uruma in DecemberJapan · 26 kmHigh 20.2°C · Low 18.1°C · 110 mm rain
- Keelung in DecemberTaiwan · 607 kmHigh 19.5°C · Low 16.5°C · 186 mm rain
- Yilan, Taiwan in DecemberTaiwan · 616 kmHigh 18.8°C · Low 15.1°C · 243 mm rain
- Neihu in DecemberTaiwan · 623 kmHigh 19.4°C · Low 16.0°C · 108 mm rain
- Taipei in DecemberTaiwan · 630 kmHigh 19.3°C · Low 15.5°C · 108 mm rain
- Danshui, Taiwan in DecemberTaiwan · 635 kmHigh 19.4°C · Low 16.2°C · 83 mm rain
- Banqiao in DecemberTaiwan · 637 kmHigh 18.9°C · Low 14.3°C · 108 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 Naha) is explained once on the Naha year overview and on the Sources, method and limits page.
Okinawa lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.