Best time to visit Marengo, IL
A month-by-month travel weather guide based on NOAA 30-year climate normals.
The most comfortable travel window in Marengo runs from May through October — 6 months of pleasant temperatures and modest rainfall.
Winter weather. Plan around weather; good for snow sports if applicable.
Daylight ≈ 9h 14m
Winter weather. Plan around weather; good for snow sports if applicable.
Daylight ≈ 10h 21m
Winter weather. Plan around weather; good for snow sports if applicable.
Daylight ≈ 11h 42m
Mild but on the chilly side. Pack a jacket; great for hiking and city walks.
Daylight ≈ 13h 9m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 14h 24m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 15h 2m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 14h 48m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 13h 43m
Sweet spot — comfortable highs in the 65-80°F range, mild nights, low rain. Ideal for nearly any outdoor plan.
Daylight ≈ 12h 16m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 10h 49m
Mild but on the chilly side. Pack a jacket; great for hiking and city walks.
Daylight ≈ 9h 33m
Winter weather. Plan around weather; good for snow sports if applicable.
Daylight ≈ 8h 55m
Looking for similar climates? See Marengo's climate twins. Or jump straight to the full climate profile.