Best time to visit Dahlgren, IL

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

The most comfortable travel window in Dahlgren runs from September through October — 2 months of pleasant temperatures and modest rainfall.

January Cold
High
41.1°F
Low
22.1°F
Precip
3.55 in

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

Daylight ≈ 9h 37m

February Cool
High
46.2°F
Low
24.3°F
Precip
2.90 in

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

Daylight ≈ 10h 34m

March Cool
High
56.4°F
Low
33.6°F
Precip
4.53 in

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

Daylight ≈ 11h 45m

April Wet
High
67.5°F
Low
43.6°F
Precip
5.29 in

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

Daylight ≈ 12h 60m

May Good
High
77.0°F
Low
54.6°F
Precip
4.94 in

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

Daylight ≈ 14h 4m

June Wet
High
85.4°F
Low
62.6°F
Precip
5.05 in

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

Daylight ≈ 14h 37m

July Hot
High
89.2°F
Low
65.9°F
Precip
3.47 in

Summer heat. Avoid midday exertion; aim for morning and evening activities.

Daylight ≈ 14h 25m

August Hot
High
88.1°F
Low
63.0°F
Precip
2.57 in

Summer heat. Avoid midday exertion; aim for morning and evening activities.

Daylight ≈ 13h 29m

September Good
High
82.1°F
Low
55.2°F
Precip
3.50 in

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

Daylight ≈ 12h 14m

October Good
High
70.4°F
Low
43.2°F
Precip
3.38 in

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

Daylight ≈ 10h 59m

November Cool
High
56.3°F
Low
32.6°F
Precip
4.41 in

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

Daylight ≈ 9h 53m

December Cool
High
45.3°F
Low
25.5°F
Precip
3.50 in

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

Daylight ≈ 9h 21m

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