Chase the autumn leaves in Japan
Japan is one of these cases which turns into a gold, yellow and orange fairy tale starting from September. And we can honestly say: We cannot imagine a more beautiful season to visit Japan.
Osaka Weather in September
Osaka in September sees very high daytime temperatures of 30°C (86°F) and nighttime lows of 21°C (70°F). Rainfall is fairly high this month at around 176 mm (6.9 in), so pack a rain jacket to stay dry.
Rainfall in Osaka in September
Analyzing past climate data, one can expect approximately 18 days of rain, averaging 176 mm (6.9 in). Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.
Temperature in Osaka in September
In September, Osaka gets very high temperatures, with highs of 30°C (86°F). Nights cool to around 21°C (70°F). The hottest part of the day is usually in the afternoon, so lighter clothing can help you stay comfortable. Nights remain mild at 21°C (70°F), making evenings a pleasant time to be outdoors.
Sunshine in Osaka in September
The area experiences a moderate amount of sunshine, with approximately 156 hours of sunlight expected. This means a decent mix of sun and overcast.If your ideal day consists of dry skies and pleasant temperatures, April, May, October and November typically offer the best circumstances for Osaka.
Osaka Temperature in September
Min Temperature
21°C (70°F)
Max Temperature
30°C (86°F)
Chance of Rain
58%
Precipitation
176 mm (6.9 in)
Rainy days
18 days
Humidity
67%
Sunshine
156 hours
Percentage Sunshine
Osaka Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Osaka - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Osaka typically drop from around 31°C (88°F) at the start of September to approximately 26°C (79°F) by the end. Nights are warm, with lows typically ranging from 19°C (66°F) to 25°C (77°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather records for Osaka in September
Browse day-by-day weather records for Osaka spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Osaka historical weather extremes in September
Based on weather observations in Osaka between 1976 and 2025, these are the recorded extremes during September.
- The warmest day in September was on September 2, 1986, with a maximum of 36°C (97°F).
- The lowest daytime temperature in September was 17°C (63°F), recorded on September 29, 2008.
- Osaka registered its coldest September night on September 28, 1992, with temperatures dropping to 11°C (52°F).
Best Places in Japan in September
Find out more about the weather in Japan and which places have the best travel conditions in this month. See all of Japan in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Osaka in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can. Bring sunglasses since you'll have some sunny periods throughout the month
What To Do in Osaka in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming7/10 -
Cycling7/10 -
Walking7/10 -
Camping6/10 -
Outdoor sports7/10
Osaka 3-Day Forecast
More climate data for Osaka
Temperature Rainfall Sunshine Humidity
See the full Osaka climate overview or explore weather in Japan.
Popular in September
Where to go in September - average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Chase the autumn leaves in Japan
Walk the 88 temple circuit
We recommend walking the 88 temple circuit from April til October. Although June, July and August can be a bit wet, hot and humid.
The famous bamboo forests of Arashiyama
The famous bamboo forests of Arashiyama lie just outside the city center of Kyoto and is unique in the world. If you look at photos of this bamboo forest, it looks like you have landed in a fairy-tale world.
10 reasons why you should visit Japan in winter
Here are 10 reasons why you should plan a winter trip to Japan. During this period, popular sights are less busy and prices for flights and hotels much cheaper.