Best time to visit Alton, MO
A month-by-month travel weather guide based on NOAA 30-year climate normals.
The most comfortable travel window in Alton runs from September through October — 2 months of pleasant temperatures and modest rainfall.
Winter weather. Plan around weather; good for snow sports if applicable.
Daylight ≈ 9h 45m
Mild but on the chilly side. Pack a jacket; great for hiking and city walks.
Daylight ≈ 10h 39m
Mild but on the chilly side. Pack a jacket; great for hiking and city walks.
Daylight ≈ 11h 46m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 12h 57m
Frequent rain. Bring waterproof gear; outdoor plans need flexibility.
Daylight ≈ 13h 57m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 14h 28m
Summer heat. Avoid midday exertion; aim for morning and evening activities.
Daylight ≈ 14h 17m
Summer heat. Avoid midday exertion; aim for morning and evening activities.
Daylight ≈ 13h 24m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 12h 13m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 11h 2m
Mild but on the chilly side. Pack a jacket; great for hiking and city walks.
Daylight ≈ 10h 0m
Mild but on the chilly side. Pack a jacket; great for hiking and city walks.
Daylight ≈ 9h 30m
Looking for similar climates? See Alton's climate twins. Or jump straight to the full climate profile.