September is a shoulder month after the summer peak, marking the beginning of cool autumn.
However, it is still hot and humid in the first half of September. Sometimes, the daily high temperatures even exceed 34°C (93°F) and you could expect more rainy days caused by typhoons.
As typhoons cease and the temperature gradually drops, late September would be a better time to visit Osaka with mild and sunny weather.
Osaka's Weather and Climate in September
In September, Osaka's weather is largely influenced by the typhoon season.
The peak occurs in the first half of the month, bringing muggy, rainy days with average temperatures ranging between 26°C and 28°C (79–82°F). As typhoon activity decreases, cooler autumn weather arrives. The second half of September features clearer skies and temperatures ranging from 21°C to 25°C (70–77°F).
Areas like Okinawa, Wakayama, and Chiba are more prone to typhoons and could experience serious disruptions. While Osaka is less affected due to its inland location, there is still a risk of flight delays or cancellations lasting 2–3 days.
If you're on a tight schedule, consider visiting in late September (or October) for a more reliable experience.
How Humid is Osaka in September
In September, Osaka experiences a significant drop in humidity, decreasing from 73% at the beginning of the month to just 22% by the end. The average temperature also falls during this time. This data indicates a transition from hot and humid conditions to mild and dry weather, making late September an excellent time to visit Osaka.
Is September a Good Time to Visit Osaka?
September could be a great time to visit Osaka, offering fewer crowds and lower prices. However, waiting until late September or October is advisable for better weather.
- If your travel time is fixed...
Keep an eye on the weather forecast. Typhoons usually have little impact on Osaka and their paths could be predicted. This allows you to enjoy indoor activities, such as visiting museums or participating in ninja training experiences, to dodge bad weather.
Contact us at Asia Highlights and our professional travel consultants will create a flexible itinerary to ensure you get the best travel experience.
- If your travel time is flexible...
Late September could be a good time to visit Osaka with mild and sunny weather when you could also enjoy fewer crowds and lower prices during the offseason. However, if you need to reduce uncertainty in your itinerary, then waiting until October to travel would be best.
Insider tip: The fall foliage season in Osaka is from November to December when you could enjoy the city and mountains covered by red maples and yellow leaves.
Top Things to Do in Osaka in September
These recommendations for Osaka in September focus on must-see attractions, special festivals, and activities that are less likely to be impacted by the weather.
If you have a bucket list, reach out to us for assistance in planning your trip of a lifetime!
1. Have Fun in Universal Studios Japan
Harry Potter Town in Universal Studios JapanUniversal Studios Japan, located in Osaka, is one of the world's five Universal Studios theme parks. After the summer peak, September sees fewer visitors as students return to school, resulting in shorter wait times. However, some outdoor attractions may close due to the weather. It's wise to check the forecast and plan your itinerary in advance.
2. Admire a Stunning Sunset from the Ebisu Tower Ferris Wheel
To avoid the heat of the day and get away from the crowds to enjoy the city scenery, how about taking a 15-minute Ferris wheel ride? You would get a chance to admire the sunset from above while watching the neon lights gradually light up. After that, you could also experience the vibrant nightlife of Dotonbori.
3. Participate in the Kishiwada Danjiri Festival
The Kishiwada Danjiri Festival is a 300-year-old tradition celebrated by manually pulling float parades and competing to discover which wooden float is the best. The event is held on a weekend in mid-September every year, from September 14th to 15th, and it is still an updated schedule in 2025.
It lasts for 2 days and you are free to attend. This is a very famous event in Japan so it is inevitable that it would attract large crowds. Keep an eye on your belongings to prevent loss, especially if you are planning to travel with children. What's more, outdoor events may be canceled due to the weather so treat this as a bonus activity.
What to Pack and Wear in Osaka in September
In September, you could wear short-sleeved tops, shorts, or lightweight long pants during the daytime.
Due to the large temperature difference between day and night, it's advisable to take a cardigan, hooded jacket, or light coat to keep warm after sunset.
Don't forget to take a sun protection jacket and sunglasses to shield against the sun as well as rain gear in case of sudden showers.
Let Us Help You Plan Your 2025 Japan Trip
Are you expecting to travel to Japan in 2025? See below for some of our most popular Japan tour itineraries:
Contact us and we'll help you to plan your Japan itinerary based on your personal preferences.
Osaka Weather by Month
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