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Climate · Osaka

Osaka in September

Hot and damp, as the days shorten.

Typical weather, averaged over 30 years

September in Osaka is hot: highs near 86°F, lows near 70°F. Rain falls on about three days a week, less often as the month goes on, and the days shorten by 47 minutes from the first week to the last.September in Osaka is hot: highs near 30°C, lows near 21°C. Rain falls on about three days a week, less often as the month goes on, and the days shorten by 47 minutes from the first week to the last.

High
86°F30°Caverage
Low
70°F21°Caverage
Wet days
3a week · 44% of days
Daylight
12h 19mon average

Is September a good time to visit Osaka?

September sits outside Osaka's best months, which run in two parts: May, or October. Expect hot days and rain on about three days a week.

How we judge it: every month is scored on how close its typical high comes to the range from 70°F to 80°F, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.How we judge it: every month is scored on how close its typical high comes to the range from 21°C to 27°C, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.

How September sits in the year

week by week

Temperature

Highs near 86°F in September, against 50°F to 92°F through the year.Highs near 30°C in September, against 10°C to 33°C through the year.

Chance of a wet day

44% of days in September, against 22% to 52% through the year.

Cloud cover

54% cover in September, against 42% to 69% through the year.

Daylight

12h 19m in September, against 9h 52m to 14h 26m through the year.

Week by week, lightly smoothed, with September shaded. The olive line marks the best months. Hover or tap a week for its figures.

Either side

  1. August92°33°low 76°low 24°3 wet days a weekRain on about three days a week.
  2. September86°30°low 70°low 21°3 wet days a weekRain on about three days a week.
  3. October76°24°low 60°low 16°2 wet days a weekRain on about two days a week.

Where Osaka sits, in September

Asia/Tokyo
this place
typical high in September 40°F4°C95°F35°C
Sunrise, mid-September
5:40 AMsets 6:07 PM
Above the sea
10 mlow-lying
Latitude
34.7°Nnorthern hemisphere
Nearest of ours
Kyoto43 km north-east

The land around Osaka, shaded by its typical high in September, the planning map's own layer. Hover the map for the figure at that spot; tap it on a phone. Clock times are local, for the 15th.

Elsewhere in Japan in September

high · low · wet days
See September on the planning mapThe whole year in Osaka

Typical weather, averaged over 30 years (1995–2024), from the 11 km grid square nearest Osaka. Temperatures are adjusted against 66 weather stations: daytime highs read about 3.1°F cold in the source data and are raised to match.Temperatures are adjusted against 66 weather stations: daytime highs read about 1.7°C cold in the source data and are raised to match. Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not. Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.

Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not.

Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.