S
M
T
W
T
F
S
27
74°
45°
28
73°
44°
29
65°
46°
30
67°
50°
1
67°
50°
2
70°
53°
3
74°
52°
4
74°
52°
5
73°
51°
6
72°
53°
7
73°
44°
8
70°
41°
9
60°
40°
10
59°
40°
11
60°
43°
12
60°
48°
13
65°
51°
14
69°
48°
15
71°
43°
16
68°
42°
17
66°
37°
18
57°
40°
19
57°
35°
20
55°
45°
21
54°
44°
22
59°
44°
23
64°
38°
24
55°
33°
25
52°
34°
26
51°
43°
27
52°
33°
28
52°
31°
29
51°
30°
30
47°
32°
31
60°
38°
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 47° to 74°, with overnight lows between 30° and 53°. The average high for October is 63° with an average low of 43°. 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.
