Weather in Okinawa in September 2025
Average weather
Average temperature in Okinawa in September
The temperature in September is +31°C on average, with a range between a maximum of +33°C during the day and a minimum of +23°C at night.
The average maximum temperature goes down 20% by the end of the month, compared with the beginning of the month, from +32°C to +30°C.
Is Okinawa warm or cold in September?
Okinawa is typically warm in September.
Maximum temperatures go down compared to the previous month from +31°C to +30°C. The minimum temperature also goes down from +26°C to +25°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
September is one of the warmest months in Okinawa, here is the comparison with other months:
Climate in Okinawa in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +31°C | +30°C | +27°C | ||||
| Min. temperature | ||||||
| +22°C | +19°C | +16°C | ||||
| Max. temperature | ||||||
| +34°C | +34°C | +33°C | ||||
| Rainfall | ||||||
| 231 mm | 222 mm | 161 mm | ||||
| Wind | ||||||
| 4 m/s | 4 m/s | 5 m/s | ||||
| Humidity | ||||||
| 84% | 81% | 76% | ||||
| Air pressure | ||||||
| 1006 HPa | 1008 HPa | 1013 HPa | ||||
| Sunny days | ||||||
| 3 | 3 | 4 | ||||
| Cloudy days | ||||||
| 5 | 5 | 9 | ||||
| Rainy days | ||||||
| 21 | 20 | 18 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as ok as in August. It’s getting colder in September. From +31°C in the day, the average maximum temperature lowers to +30°C. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 231 mm to 222 mm. It feels drier, as humidity decreases from 84% to 81%. The average wind speed doesn’t change much during September, staying around 4 m/s. The amount of sunny days stay about the same, averaging 3 sunny days during the month.
October brings much the same weather, it remains ok.
Wind
The average wind speed is 4 m/s getting up to 8 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Okinawa is gradually decreasing during September, going from 7 m/s to 3 m/s over the course of the month.
Rain
How was the weather last September in Okinawa?
Climate Change over Years
The climate in Okinawa in September has not changed much over the last 43 years.
The average temperature was the lowest in 1986 (+24°C) and the highest in 1998 (+26°C). The driest year was 1991 with only 1107 mm of rainfall, and the wettest year was 2022 with 3648 mm.
FAQ
Is September a good time to visit Okinawa?
Can you sunbathe in Okinawa in September?
Is Okinawa rainy in September?
Is it sunny in Okinawa in September?
Other cities in Japan
Monthly weather in Okinawa
Source of the data
For this page, we’ve looked at the typical weather in Okinawa, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.