Japan · 1991–2020 normal
Iwanai in
September.
Typical September weather in Iwanai: 21.7°C by day, 14.3°C at night, 167 mm of rain over 12.7 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high21.7°C
Typical low14.3°C
Rain167 mm
Wet days12.7
Comfort score 64 this month (July leads the year at 77). Daylight is calculated as 12 h 26 from latitude 42.97°. Open-water sea temperature is 21.2°C (16 km from the place centre).
Event window
Warm sea in September
The nearest open-water NOAA OISST 1991–2020 cell averages 21.2°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 2129868
- NOAA station
- JA000047421 · SUTTSU
- Station distance
- 30.7 km from the place centre
- Coverage
- Good coverage · 18 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.