Climate averages 1991–2020
Naha weather
in September.
A hot, very wet month: the 3rd warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Naha: daytime highs average 28.3°C and nights cool to about 26.4°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 199 mm of rain on roughly 14 days, which makes September a very wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 20 min on an average September day.
The nearest other city in this atlas is Okinawa (18 km away). In September its highs average 27.5°C, 0.8°C cooler than Naha, with 199 mm of rain.
Among the 303 cities listed in Japan, Naha ranks 2nd of 303 for the warmest September highs and joint 190th of 303 for the driest September (rainfall, lowest first). The mean September high of those 303 cities is 25.7°C; Naha is 2.6°C warmer than that mean.
From September to October, average highs fall by 2.1°C to 26.2°C, and monthly rainfall falls from 199 mm to 141 mm.
The annual picture
September 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, selected | 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
September in nearby cities
- Okinawa in SeptemberJapan · 18 kmHigh 27.5°C · Low 25.6°C · 199 mm rain
- Uruma in SeptemberJapan · 26 kmHigh 28.0°C · Low 26.2°C · 188 mm rain
- Keelung in SeptemberTaiwan · 607 kmHigh 28.3°C · Low 25.2°C · 192 mm rain
- Yilan, Taiwan in SeptemberTaiwan · 616 kmHigh 27.8°C · Low 23.7°C · 336 mm rain
- Neihu in SeptemberTaiwan · 623 kmHigh 28.5°C · Low 24.8°C · 258 mm rain
- Taipei in SeptemberTaiwan · 630 kmHigh 28.6°C · Low 24.5°C · 258 mm rain
- Danshui, Taiwan in SeptemberTaiwan · 635 kmHigh 28.7°C · Low 25.2°C · 169 mm rain
- Banqiao in SeptemberTaiwan · 637 kmHigh 28.5°C · Low 23.5°C · 258 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.