S
M
T
W
T
F
S
31
86°
59°
1
90°
61°
2
95°
55°
3
93°
55°
4
86°
54°
5
84°
61°
6
79°
54°
7
86°
55°
8
84°
55°
9
84°
50°
10
84°
52°
11
82°
50°
12
81°
54°
13
82°
59°
14
70°
55°
15
59°
50°
16
73°
50°
17
81°
50°
18
84°
48°
19
82°
50°
20
82°
48°
21
70°
46°
22
66°
45°
23
73°
39°
24
81°
45°
25
81°
50°
26
70°
48°
27
66°
46°
28
73°
41°
29
70°
46°
30
64°
46°
1
61°
46°
2
63°
46°
3
66°
39°
4
63°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Libby
Libby's September 2025 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 Libby. See also: October | November | December.
