Is Okayama hot in September?
Days are typically warm at 28.7°C, while nights average 20.3°C.
Japan · 1991–2020 normal
Okayama in
September.
Typical September weather in Okayama: 28.7°C by day, 20.3°C at night, 155 mm of rain over 8.9 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high28.7°C
Typical low20.3°C
Rain155 mm
Wet days8.9
In the year-round weather comparison, September scores 53 out of 100 (October leads the year at 81). Daylight is calculated as 12 h 21 from latitude 34.65°. Open-water sea temperature is 26.3°C (41 km from the place centre).
September at a glance
What is Okayama like in September?
Plain answers from the measured climate record—not a forecast or a promise about a particular trip.
Does it rain much?
The measured monthly average is 155 mm across about 9 wet days.
How much daylight is there?
There are about 12 h 21 between sunrise and sunset at mid-month, calculated from the place latitude.
Is September a good time to visit?
September ranks 5 of 12 in our weather comparison; October ranks first.
Event window
Warm sea in September
The nearest open-water NOAA OISST 1991–2020 cell averages 26.3°C in September. A sheltered bay can run warmer than that open-water cell.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 1854383
- NOAA station
- JA000047768 · OKAYAMA
- Station distance
- 2.4 km from the place centre
- Coverage
- Good coverage · 17 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.
Next step
Choose your month.
Then plan the details.
The weather comparison for Okayama is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.
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