Best time to visit Monmouth, IL
A month-by-month travel weather guide based on NOAA 30-year climate normals.
The most comfortable travel window in Monmouth runs from June through October — 5 months of pleasant temperatures and modest rainfall.
Winter weather. Plan around weather; good for snow sports if applicable.
Daylight ≈ 9h 22m
Winter weather. Plan around weather; good for snow sports if applicable.
Daylight ≈ 10h 26m
Mild but on the chilly side. Pack a jacket; great for hiking and city walks.
Daylight ≈ 11h 43m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 13h 6m
Frequent rain. Bring waterproof gear; outdoor plans need flexibility.
Daylight ≈ 14h 17m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 14h 53m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 14h 40m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 13h 38m
Sweet spot — comfortable highs in the 65-80°F range, mild nights, low rain. Ideal for nearly any outdoor plan.
Daylight ≈ 12h 15m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 10h 53m
Mild but on the chilly side. Pack a jacket; great for hiking and city walks.
Daylight ≈ 9h 40m
Winter weather. Plan around weather; good for snow sports if applicable.
Daylight ≈ 9h 4m
Looking for similar climates? See Monmouth's climate twins. Or jump straight to the full climate profile.