United States · 1991–2020 normal
Alton in
January.
Typical January weather in Alton: -2.3°C by day, -12.6°C at night, 17 mm of rain over 3.9 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high-2.3°C
Typical low-12.6°C
Rain17 mm
Wet days3.9
Comfort score 5 this month (September leads the year at 78). Daylight is calculated as 9 h 20 from latitude 42.99°.
Event window
Frost-level nights in January
The measured night-time normal is -12.6°C, so frost is typical rather than exceptional this month.
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 · 30 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.