UTC Offset
UTC+09:00
Onna, Japan Snapshot 2026
Where is Onna?
Onna, Japan
- Continent
- Asia
- Country
- Japan
- City
- Onna
- Population
- 10.9K
- Coordinates
- 26.50°, 127.85°
Onna is a city in Japan with a population of approximately 10.9K. Average temperatures range from 17°C (62°F) in January to 30°C (85°F) in August. The best time to visit is March, April, May, October, November.
Time in Onna right now
Open full time & time zone page 19:51 51
Tuesday, June 16, 2026
IANA time zone
Asia/Tokyo
Daylight saving
No DST
Next DST change
—
Live weather in Onna
Daylight in Onna today
View full sunrise & sunset page Sunrise
Sunset
Day length
13h 48m
Climate normals for Onna
Long-term monthly averages based on historical data.
January
Fair 
February
Good March best
Good April best
Excellent May best
Excellent June
Wet July
Poor August
Wet September
Wet October best
Excellent November best
Excellent December
Fair | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 19°C / 17°C | 17°C / 13°C | 12days (117 mm) Wet | 5.4h Fair | 65% Muggy | 4.3 Moderate | Fair | View Details |
| February | 19°C / 17°C | 17°C / 13°C | 12days (96 mm) Wet | 6.3h Fair | 68% Muggy | 4.8 Moderate | Good | View Details |
| March best | 21°C / 18°C | 20°C / 16°C | 13days (124 mm) Wet | 7.8h Good | 71% Muggy | 6.3 High | Good | View Details |
| April best | 23°C / 21°C | 23°C / 19°C | 12days (155 mm) Wet | 8.8h Good | 77% Humid | 7.1 Very High | Excellent | View Details |
| May best | 25°C / 23°C | 28°C / 24°C | 15days (246 mm) Wet | 9h Good | 83% Humid | 6.8 High | Excellent | View Details |
| June | 28°C / 26°C | 32°C / 28°C | 17days (270 mm) Wet | 9.2h Good | 87% Very Muggy | 7.1 Very High | Wet | View Details |
| July | 29°C / 28°C | 35°C / 31°C | 12days (153 mm) Wet | 11.1h Excellent | 84% Humid | 8 Very High | Poor | View Details |
| August | 30°C / 28°C | 35°C / 31°C | 14days (195 mm) Wet | 10.8h Excellent | 82% Humid | 7.9 Very High | Wet | View Details |
| September | 29°C / 27°C | 33°C / 29°C | 16days (180 mm) Wet | 9.8h Good | 81% Humid | 7.4 Very High | Wet | View Details |
| October best | 27°C / 25°C | 29°C / 25°C | 12days (138 mm) Wet | 9h Good | 74% Muggy | 6.1 High | Excellent | View Details |
| November best | 24°C / 22°C | 24°C / 20°C | 11days (126 mm) Wet | 7.2h Good | 70% Muggy | 4.7 Moderate | Excellent | View Details |
| December | 21°C / 19°C | 19°C / 15°C | 13days (145 mm) Wet | 5.2h Fair | 67% Muggy | 3.7 Moderate | Fair | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 19°C / 17°C . Feb: 19°C / 17°C . Mar: 21°C / 18°C . Apr: 23°C / 21°C . May: 25°C / 23°C . Jun: 28°C / 26°C . Jul: 29°C / 28°C . Aug: 30°C / 28°C . Sep: 29°C / 27°C . Oct: 27°C / 25°C . Nov: 24°C / 22°C . Dec: 21°C / 19°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 117 mm. Feb: 96 mm. Mar: 124 mm. Apr: 155 mm. May: 246 mm. Jun: 270 mm. Jul: 153 mm. Aug: 195 mm. Sep: 180 mm. Oct: 138 mm. Nov: 126 mm. Dec: 145 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 65%. Feb: 68%. Mar: 71%. Apr: 77%. May: 83%. Jun: 87%. Jul: 84%. Aug: 82%. Sep: 81%. Oct: 74%. Nov: 70%. Dec: 67%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 35 km/h . Feb: 35 km/h . Mar: 32 km/h . Apr: 30 km/h . May: 29 km/h . Jun: 30 km/h . Jul: 29 km/h . Aug: 28 km/h . Sep: 29 km/h . Oct: 32 km/h . Nov: 34 km/h . Dec: 37 km/h .
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 22°C . Feb: 21°C . Mar: 21°C . Apr: 23°C . May: 24°C . Jun: 27°C . Jul: 30°C . Aug: 30°C . Sep: 30°C . Oct: 29°C . Nov: 26°C . Dec: 24°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 4. Feb: UV 5. Mar: UV 6. Apr: UV 7. May: UV 7. Jun: UV 7. Jul: UV 8. Aug: UV 8. Sep: UV 7. Oct: UV 6. Nov: UV 5. Dec: UV 4.
Frequently Asked Questions
Onna has a population of approximately 10.9K.
The best months to visit Onna are March, April, May, October, November, when temperatures are pleasant and rainfall is lower.
Onna receives approximately 1945mm of rainfall annually across 159 rainy days.
Onna is located in Japan, in the Asia region.