S
M
T
W
T
F
S
27
73°
45°
28
74°
44°
29
78°
48°
30
67°
59°
1
68°
49°
2
64°
43°
3
65°
48°
4
69°
43°
5
64°
42°
6
66°
49°
7
71°
52°
8
70°
51°
9
67°
49°
10
67°
51°
11
65°
46°
12
64°
46°
13
64°
47°
14
63°
43°
15
57°
44°
16
65°
48°
17
67°
48°
18
66°
47°
19
59°
41°
20
53°
39°
21
53°
36°
22
54°
39°
23
62°
46°
24
64°
45°
25
63°
44°
26
53°
40°
27
50°
38°
28
57°
43°
29
56°
39°
30
56°
43°
31
60°
39°
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 50° to 71°, with overnight lows between 36° and 52°. The average high for October is 62° 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.
