S
M
T
W
T
F
S
30
70°
47°
31
67°
44°
1
75°
46°
2
75°
45°
3
80°
46°
4
83°
44°
5
83°
49°
6
84°
51°
7
79°
49°
8
83°
48°
9
80°
43°
10
80°
40°
11
79°
43°
12
82°
47°
13
83°
49°
14
69°
53°
15
75°
51°
16
74°
49°
17
61°
53°
18
69°
48°
19
66°
43°
20
66°
37°
21
70°
37°
22
75°
39°
23
67°
50°
24
64°
48°
25
60°
43°
26
70°
39°
27
73°
42°
28
60°
49°
29
64°
44°
30
54°
43°
1
72°
36°
2
74°
39°
3
79°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Basalt
Basalt's September 2026 forecast shows daily high temperatures ranging from 79° to 79°, with overnight lows between 43° and 43°. The average high for September is 79° 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 September weather will actually feel in Basalt. See also: October | November | December.
