United States · 1991–2020 normal
Alton in
September.
Typical September weather in Alton: 25.3°C by day, 10.5°C at night, 82 mm of rain over 6.6 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high25.3°C
Typical low10.5°C
Rain82 mm
Wet days6.6
Comfort score 78 this month, the highest of the year. Daylight is calculated as 12 h 26 from latitude 42.99°.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 4846745
- NOAA station
- USC00137700 · SIOUX CTR 2 SE
- Station distance
- 13.8 km from the place centre
- Coverage
- Strong coverage · 29 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.