Best time to visit Mount Vernon, SD
A month-by-month travel weather guide based on NOAA 30-year climate normals.
The most comfortable travel window in Mount Vernon runs from May through September — 5 months of pleasant temperatures and modest rainfall.
Winter weather. Plan around weather; good for snow sports if applicable.
Daylight ≈ 9h 5m
Winter weather. Plan around weather; good for snow sports if applicable.
Daylight ≈ 10h 16m
Mild but on the chilly side. Pack a jacket; great for hiking and city walks.
Daylight ≈ 11h 41m
Mild but on the chilly side. Pack a jacket; great for hiking and city walks.
Daylight ≈ 13h 13m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 14h 32m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 15h 12m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 14h 57m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 13h 49m
Sweet spot — comfortable highs in the 65-80°F range, mild nights, low rain. Ideal for nearly any outdoor plan.
Daylight ≈ 12h 17m
Mild but on the chilly side. Pack a jacket; great for hiking and city walks.
Daylight ≈ 10h 46m
Mild but on the chilly side. Pack a jacket; great for hiking and city walks.
Daylight ≈ 9h 25m
Winter weather. Plan around weather; good for snow sports if applicable.
Daylight ≈ 8h 45m
Looking for similar climates? See Mount Vernon's climate twins. Or jump straight to the full climate profile.