S
M
T
W
T
F
S
30
76°
52°
31
76°
51°
1
77°
52°
2
78°
53°
3
74°
49°
4
73°
47°
5
74°
44°
6
73°
46°
7
81°
52°
8
82°
53°
9
77°
53°
10
79°
52°
11
79°
52°
12
78°
51°
13
77°
48°
14
72°
45°
15
69°
45°
16
73°
48°
17
77°
50°
18
78°
48°
19
70°
42°
20
63°
40°
21
78°
45°
22
70°
44°
23
73°
39°
24
67°
41°
25
71°
39°
26
70°
40°
27
69°
47°
28
72°
34°
29
64°
29°
30
57°
31°
1
57°
34°
2
63°
34°
3
68°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lander
Lander's September 2026 forecast shows daily high temperatures ranging from 57° to 82°, with overnight lows between 29° and 53°. The average high for September is 72° with an average low of 45°. 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 Lander. See also: October | November | December.