Best time to visit Fairmount, IL

A month-by-month travel weather guide based on NOAA 30-year climate normals.

The most comfortable travel window in Fairmount runs from April through October — 7 months of pleasant temperatures and modest rainfall.

January Cold
High
32.6°F
Low
17.2°F
Precip
2.35 in

Winter weather. Plan around weather; good for snow sports if applicable.

Daylight ≈ 9h 27m

February Cold
High
37.1°F
Low
20.4°F
Precip
2.00 in

Winter weather. Plan around weather; good for snow sports if applicable.

Daylight ≈ 10h 28m

March Cool
High
49.2°F
Low
30.1°F
Precip
2.77 in

Mild but on the chilly side. Pack a jacket; great for hiking and city walks.

Daylight ≈ 11h 44m

April Good
High
62.3°F
Low
40.6°F
Precip
4.15 in

Comfortable for most activities. Bring layers; nights can be cool.

Daylight ≈ 13h 4m

May Good
High
73.3°F
Low
52.8°F
Precip
4.66 in

Comfortable for most activities. Bring layers; nights can be cool.

Daylight ≈ 14h 13m

June Good
High
82.0°F
Low
62.2°F
Precip
4.61 in

Comfortable for most activities. Bring layers; nights can be cool.

Daylight ≈ 14h 48m

July Good
High
84.1°F
Low
64.2°F
Precip
4.72 in

Comfortable for most activities. Bring layers; nights can be cool.

Daylight ≈ 14h 35m

August Good
High
83.2°F
Low
61.5°F
Precip
3.25 in

Comfortable for most activities. Bring layers; nights can be cool.

Daylight ≈ 13h 35m

September Excellent
High
78.1°F
Low
54.0°F
Precip
2.73 in

Sweet spot — comfortable highs in the 65-80°F range, mild nights, low rain. Ideal for nearly any outdoor plan.

Daylight ≈ 12h 15m

October Good
High
65.4°F
Low
42.8°F
Precip
3.33 in

Comfortable for most activities. Bring layers; nights can be cool.

Daylight ≈ 10h 55m

November Cool
High
50.0°F
Low
32.2°F
Precip
3.34 in

Mild but on the chilly side. Pack a jacket; great for hiking and city walks.

Daylight ≈ 9h 44m

December Cold
High
37.6°F
Low
23.4°F
Precip
2.48 in

Winter weather. Plan around weather; good for snow sports if applicable.

Daylight ≈ 9h 10m

Looking for similar climates? See Fairmount's climate twins. Or jump straight to the full climate profile.