Osaka in September
In September, Osaka averages 29°C (84°F) during the day and 21°C (70°F) at night, with around 9 days of rain (160 mm total).
ShoulderConditions are warm and beach-friendly. Occasional showers are likely but won't dominate.
It's peak typhoon season in Osaka during September. Travel is possible but expect storm risk, possible flight disruption, and generally lower travel insurance coverage.
How September compares to the rest of the year in Osaka
September is in the middle of the year for warmth in Osaka (4th of 12) and moderately rainy compared to the rest of the year (5th of 12). Daytime temperature runs 8°C above the annual average (21°C). September runs 4°C cooler than August (33°C) and cools 6°C in October (23°C).
September sunrise & sunset in Osaka
Times shown for Osaka local time (Asia/Tokyo), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Osaka — September
Golden-hour and blue-hour windows for the 15th of September, in Osaka's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Osaka in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (Shoulder) and Osaka's popularity.
Crowds & pricing — September in Osaka
Osaka is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Why this tier: comfortable tourism weather peak hazard season (1 active)
Sun & mosquito risk — September in Osaka
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Osaka in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 10°C / 50°F | 2°C / 36°F | 45 mm | 5 | 0 |
| February | 11°C / 52°F | 3°C / 37°F | 65 mm | 5 | 0 |
| March | 14°C / 57°F | 6°C / 43°F | 105 mm | 8 | 0 |
| April | 20°C / 68°F | 10°C / 50°F | 125 mm | 9 | 0 |
| May | 25°C / 77°F | 15°C / 59°F | 135 mm | 9 | 0 |
| June | 29°C / 84°F | 20°C / 68°F | 180 mm | 11 | 0 |
| July | 33°C / 91°F | 24°C / 75°F | 155 mm | 9 | 0 |
| August | 33°C / 91°F | 25°C / 77°F | 110 mm | 7 | 0 |
| September | 29°C / 84°F | 21°C / 70°F | 160 mm | 9 | 0 |
| October | 23°C / 73°F | 15°C / 59°F | 110 mm | 8 | 0 |
| November | 18°C / 64°F | 10°C / 50°F | 70 mm | 6 | 0 |
| December | 12°C / 54°F | 4°C / 39°F | 45 mm | 5 | 0 |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Osaka in September →
Frequently asked questions
How hot is Osaka in September?
In September, Osaka averages a high of 29°C (84°F) and a low of 21°C (70°F) — generally warm.
Does it rain a lot in Osaka in September?
September sees occasional rain in Osaka, with about 9 rainy days on average.
Is September a good time to visit Osaka?
September is warm. It suits travelers who are comfortable with warm weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Osaka in September?
Pack lightweight, breathable clothing, sunglasses and sunscreen. See the full September packing list for Osaka for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.