S
M
T
W
T
F
S
27
73°
45°
28
74°
44°
29
78°
48°
30
67°
59°
1
70°
60°
2
65°
48°
3
69°
42°
4
72°
49°
5
69°
43°
6
73°
47°
7
74°
47°
8
69°
45°
9
69°
54°
10
79°
57°
11
70°
56°
12
73°
50°
13
58°
44°
14
58°
44°
15
60°
42°
16
56°
41°
17
57°
44°
18
58°
43°
19
58°
44°
20
60°
40°
21
54°
44°
22
58°
42°
23
52°
39°
24
58°
43°
25
61°
45°
26
61°
38°
27
60°
36°
28
50°
32°
29
49°
40°
30
53°
39°
31
60°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Crystal Lake
Crystal Lake's October 2026 forecast shows daily high temperatures ranging from 49° to 79°, with overnight lows between 32° and 57°. The average high for October is 61° with an average low of 44°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in Crystal Lake. See also: November | December | January.
