Osaka, Japan Weather
Osaka hourly forecast: next 24 hours
Today's high of 60°F (16°C) is about 30°F (17°C) below the typical August high of 90°F (32°C).
Current conditions in detail
Osaka weather tomorrow (Tuesday, August 18)
Tomorrow in Osaka looks sunny, with a high of 66° and an overnight low of 51°. There is a 64% chance of rain - plan accordingly. Winds top out near 20 mph, and the UV index reaches 10 (very high).
Osaka 14-day forecast
About the weather in Osaka
Weather in Osaka is shaped by its humid subtropical climate - expect hot, humid summers and generally mild winters. August afternoons typically reach 90°F (32°C), while January highs hover near 48°F (9°C). Annual precipitation averages 69.2 inches (1758 mm) over about 128 rainy days.
Osaka weather: quick facts
- Hottest month: August - highs near 90°F (32°C)
- Coldest month: January - highs near 48°F (9°C)
- Record high: 103°F (39°C) · Record low: 19°F (-7°C) (2015–2024)
- Wettest month: July (16 rainy days) · Sunniest: August (10.6 h sun/day)
- Climate type: humid subtropical - hot, humid summers and generally mild winters
Temperatures through the year
The warmest stretch of the year centers on August. Highs average 90°F (32°C) and overnight lows stay near 78°F (25°C). The coolest month is January, with typical highs of 48°F (9°C) and lows around 34°F (1°C). Based on 2015–2024 weather data, temperatures have reached as high as 103°F (39°C) and dropped as low as 19°F (-7°C).
Rain, sun and snow
July is usually the wettest month. It brings about 9.9 inches (252 mm) of rain over 16 days, while January is the driest. August brings the most sunshine, averaging 10.6 hours of sun a day. Snowfall is rare but not unheard of.
Season by season
Spring (March through May)
Spring in Osaka stays on the cool side of mild, with daytime highs averaging 66°F (19°C) and nights around 49°F (10°C); expect showers on roughly 32 days across the season.
Summer (June through August)
Summer in Osaka is hot, with daytime highs averaging 85°F (30°C) and nights around 73°F (23°C); expect showers on roughly 44 days across the season. With the humidity factored in, afternoons often feel hotter than the thermometer reads - run the numbers through the humidity and dew point converter to see why.
Fall (September through November)
Fall in Osaka is pleasantly warm, with daytime highs averaging 73°F (23°C) and nights around 59°F (15°C); expect showers on roughly 32 days across the season.
Winter (December through February)
Winter in Osaka is brisk and cold, with daytime highs averaging 50°F (10°C) and nights around 36°F (2°C); expect showers on roughly 20 days across the season.
Average temperatures in Osaka by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 48° | 34° | 7 | 2.3 in | 7.6 h/day | 74% |
| February | 50° | 35° | 7 | 2.5 in | 7.9 h/day | 72% |
| March | 57° | 40° | 11 | 4.5 in | 8.5 h/day | 72% |
| April | 66° | 49° | 10 | 6.1 in | 8.6 h/day | 73% |
| May | 74° | 58° | 11 | 6.9 in | 9.4 h/day | 73% |
| June | 80° | 66° | 14 | 9.0 in | 8.7 h/day | 78% |
| July | 87° | 75° | 16 | 9.9 in | 9.5 h/day | 81% |
| August | 90° | 78° | 14 | 6.6 in | 10.6 h/day | 75% |
| September | 84° | 71° | 14 | 8.6 in | 8.5 h/day | 77% |
| October | 73° | 58° | 10 | 7.0 in | 8.1 h/day | 76% |
| November | 63° | 48° | 8 | 3.3 in | 7.8 h/day | 77% |
| December | 53° | 38° | 7 | 2.4 in | 7.7 h/day | 74% |