Onna
26.50° N, 127.85° E
When to go?
Mean 17 °C, 13 rain days in the month (107 mm).
Good for
- Ideal for the seawater at 22 °C
Mean 18 °C, 13 rain days in the month (103 mm).
The least rainy of the months with the right temperature.
Mean 19 °C, 14 rain days in the month (131 mm).
The least rainy of the months with the right temperature.
Mean 21 °C, 14 rain days in the month (163 mm).
Good for
- Ideal for the seawater at 22 °C
Mean 24 °C, 16 rain days in the month (241 mm).
Good for
- Ideal for the seawater at 24 °C
Against
- Often rainyrain on 5 days in 10
Mean 27 °C, 16 rain days in the month (249 mm).
Against
- Hothighs of 28 °C
- Often rainyrain on 5 days in 10
Mean 28 °C, 14 rain days in the month (158 mm).
Good for
- Ideal for the seawater at 29 °C
Against
- Hothighs of 30 °C
- Typhoonsone within 300 km, 1 year in 4
Mean 28 °C, 17 rain days in the month (207 mm).
Good for
- Ideal for the seawater at 29 °C
Against
- Hothighs of 30 °C
- Often rainyrain on 5 days in 10
- Typhoonsone within 300 km, 1 year in 2
Mean 28 °C, 17 rain days in the month (209 mm).
Good for
- Ideal for the seawater at 28 °C
Against
- Hothighs of 29 °C
- Often rainyrain on 6 days in 10
- Typhoonsone within 300 km, 1 year in 2
Mean 25 °C, 14 rain days in the month (153 mm).
Good for
- Ideal for the seawater at 27 °C
Against
- Hothighs of 27 °C
- Typhoonsone within 300 km, 1 year in 3
Mean 23 °C, 13 rain days in the month (116 mm).
Good for
- Ideal for the seawater at 25 °C
Mean 19 °C, 13 rain days in the month (125 mm).
Good for
- Ideal for the seawater at 24 °C
No ideal month: the best months are November–April, the least rainy with the right temperature. Ideal for the sea: April–May, July–January. Avoid July–September (hot and typhoons, at times often rainy), May–June (often rainy, at times hot), October (hot and typhoons).
What is the climate like?
Temperature and rain
Monthly min and max temperature (°C)
Monthly min and max temperature (°C)
How much it rains
Rain days and how much water
Rain days and how much water
Bars: length = rain days, thickness = mm on a rain day, area = the month's rain. 3 mm a day7 mm a day15 mm a day
Colour = the month's rain: 103060100160250400mm
Daylight hours
Daylight and sky: sunrise, sunset and cloud cover
daylight under a clear sky (average share)daylight under cloud
daylight under a clear sky (average share)daylight under cloud
Times on the 15th of each month, in local time: daylight saving where and when it applies, standard time in the other months.
Sea temperature: East China Sea
Monthly mean sea temperature: East China Sea (°C)
Monthly mean sea temperature: East China Sea (°C)
Effect of climate change
Today's climate (1996–2025) compared with 1961–1990:
In short
Year by year
Temperature of each year
Against 1961–1990 the mean temperature of today (1996–2025) has changed by +0.6 °C; in the last ten years by +1.0 °C. Warmest year: 2024 (+1.5 °C), coldest: 1968 (−0.5 °C).
January and February warmed the most (+0.9 and +0.9 °C), April the least (0.0 °C). The warm season (above the annual mean of then, 23 °C) begins 1 day later and ends 9 days later.
Warming stripes: after an idea by Ed Hawkins (University of Reading), showyourstripes.info, CC BY 4.0.
Rain of each year (% against 1961–1990)
more rain than in 1961–1990less rain
Rain in a year: no clear trend, dry and wet years alternate as before.
The sea, then and now
+0.3 °Cthe sea today, compared with 1961–1990