Best time to visit Pontoosuc, IL

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

The most comfortable travel window in Pontoosuc runs from July through October — 4 months of pleasant temperatures and modest rainfall.

January Cold
High
32.8°F
Low
16.9°F
Precip
1.69 in

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

Daylight ≈ 9h 24m

February Cold
High
37.5°F
Low
20.9°F
Precip
1.93 in

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

Daylight ≈ 10h 26m

March Cool
High
49.9°F
Low
31.6°F
Precip
2.72 in

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

Daylight ≈ 11h 43m

April Good
High
62.2°F
Low
42.5°F
Precip
3.97 in

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

Daylight ≈ 13h 5m

May Wet
High
72.3°F
Low
53.8°F
Precip
5.11 in

Frequent rain. Bring waterproof gear; outdoor plans need flexibility.

Daylight ≈ 14h 16m

June Wet
High
81.5°F
Low
63.4°F
Precip
5.16 in

Frequent rain. Bring waterproof gear; outdoor plans need flexibility.

Daylight ≈ 14h 52m

July Good
High
85.1°F
Low
67.5°F
Precip
4.06 in

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

Daylight ≈ 14h 38m

August Good
High
83.8°F
Low
65.6°F
Precip
3.80 in

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

Daylight ≈ 13h 37m

September Excellent
High
77.1°F
Low
57.2°F
Precip
3.51 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
64.2°F
Low
45.2°F
Precip
3.06 in

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

Daylight ≈ 10h 53m

November Cool
High
49.7°F
Low
32.8°F
Precip
2.43 in

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

Daylight ≈ 9h 41m

December Cold
High
37.6°F
Low
22.7°F
Precip
1.92 in

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

Daylight ≈ 9h 6m

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