S
M
T
W
T
F
S
30
77°
61°
31
76°
59°
1
73°
58°
2
74°
52°
3
74°
56°
4
78°
62°
5
70°
52°
6
70°
51°
7
80°
62°
8
75°
55°
9
69°
50°
10
66°
50°
11
68°
52°
12
66°
51°
13
66°
50°
14
67°
51°
15
68°
52°
16
69°
53°
17
70°
51°
18
65°
46°
19
68°
52°
20
67°
53°
21
65°
53°
22
66°
52°
23
68°
52°
24
69°
51°
25
69°
51°
26
67°
48°
27
64°
45°
28
61°
44°
29
62°
44°
30
62°
50°
1
61°
49°
2
63°
45°
3
65°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lostau
Lostau's September 2026 forecast shows daily high temperatures ranging from 61° to 80°, with overnight lows between 44° and 62°. The average high for September is 67° with an average low of 50°. 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 Lostau. See also: October | November | December.
