Climate averages 1991–2020
Naha weather
in January.
A mild, wet month: the coolest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a mild month in Naha: daytime highs average 18.9°C and nights cool to about 16.6°C. By daytime temperature it is the coolest month of the year.
Expect about 103 mm of rain on roughly 12 days, which makes January a wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 42 min on an average January day.
The nearest other city in this atlas is Okinawa (18 km away). In January its highs average 18.0°C, 0.9°C cooler than Naha, with 103 mm of rain.
Among the 303 cities listed in Japan, Naha ranks 1st of 303 for the warmest January highs and joint 269th of 303 for the driest January (rainfall, lowest first). The mean January high of those 303 cities is 7.0°C; Naha is 11.9°C warmer than that mean.
From January to February, average highs rise by 0.2°C to 19.0°C, and monthly rainfall falls from 103 mm to 96 mm.
The annual picture
January 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, selected | 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 | 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
January in nearby cities
- Okinawa in JanuaryJapan · 18 kmHigh 18.0°C · Low 15.6°C · 103 mm rain
- Uruma in JanuaryJapan · 26 kmHigh 18.5°C · Low 16.2°C · 103 mm rain
- Keelung in JanuaryTaiwan · 607 kmHigh 18.0°C · Low 14.7°C · 178 mm rain
- Yilan, Taiwan in JanuaryTaiwan · 616 kmHigh 17.5°C · Low 13.4°C · 190 mm rain
- Neihu in JanuaryTaiwan · 623 kmHigh 17.9°C · Low 14.2°C · 87 mm rain
- Taipei in JanuaryTaiwan · 630 kmHigh 17.7°C · Low 13.6°C · 87 mm rain
- Danshui, Taiwan in JanuaryTaiwan · 635 kmHigh 17.8°C · Low 14.3°C · 78 mm rain
- Banqiao in JanuaryTaiwan · 637 kmHigh 17.4°C · Low 12.4°C · 87 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.