S
M
T
W
T
F
S
30
81°
40°
31
85°
47°
1
72°
47°
2
60°
46°
3
59°
45°
4
64°
42°
5
67°
40°
6
63°
30°
7
72°
35°
8
79°
41°
9
86°
45°
10
86°
45°
11
83°
40°
12
76°
38°
13
78°
39°
14
81°
42°
15
79°
42°
16
80°
41°
17
81°
42°
18
81°
44°
19
80°
36°
20
74°
39°
21
74°
42°
22
73°
40°
23
73°
41°
24
77°
42°
25
76°
41°
26
73°
40°
27
72°
40°
28
72°
38°
29
69°
34°
30
68°
35°
1
72°
40°
2
78°
40°
3
77°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Alturas
Alturas's September 2026 forecast shows daily high temperatures ranging from 63° to 86°, with overnight lows between 30° and 45°. The average high for September is 76° with an average low of 40°. 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 Alturas. See also: October | November | December.
