S
M
T
W
T
F
S
30
72°
63°
31
83°
64°
1
91°
60°
2
84°
59°
3
77°
54°
4
66°
60°
5
80°
57°
6
82°
51°
7
80°
53°
8
71°
61°
9
82°
54°
10
76°
48°
11
81°
44°
12
76°
53°
13
66°
37°
14
67°
33°
15
73°
48°
16
72°
39°
17
71°
49°
18
61°
44°
19
60°
45°
20
59°
37°
21
61°
39°
22
66°
35°
23
69°
31°
24
69°
37°
25
74°
41°
26
73°
37°
27
73°
36°
28
76°
45°
29
75°
42°
30
74°
58°
1
69°
47°
2
63°
32°
3
61°
30°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Crystal Falls
Crystal Falls's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Crystal Falls. See also: October | November | December.