Best time to visit McLean, IL
A month-by-month travel weather guide based on NOAA 30-year climate normals.
The most comfortable travel window in McLean runs from April through October — 7 months of pleasant temperatures and modest rainfall.
Winter weather. Plan around weather; good for snow sports if applicable.
Daylight ≈ 9h 26m
Winter weather. Plan around weather; good for snow sports if applicable.
Daylight ≈ 10h 28m
Mild but on the chilly side. Pack a jacket; great for hiking and city walks.
Daylight ≈ 11h 44m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 13h 5m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 14h 14m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 14h 50m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 14h 36m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 13h 36m
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 54m
Mild but on the chilly side. Pack a jacket; great for hiking and city walks.
Daylight ≈ 9h 43m
Winter weather. Plan around weather; good for snow sports if applicable.
Daylight ≈ 9h 8m
Looking for similar climates? See McLean's climate twins. Or jump straight to the full climate profile.