S
M
T
W
T
F
S
30
83°
42°
31
85°
45°
1
89°
45°
2
90°
44°
3
89°
40°
4
89°
45°
5
88°
44°
6
86°
44°
7
89°
45°
8
88°
37°
9
80°
37°
10
78°
41°
11
80°
43°
12
78°
42°
13
77°
38°
14
76°
34°
15
75°
34°
16
81°
34°
17
84°
39°
18
83°
41°
19
Hist. Avg.
80°
37°
20
Hist. Avg.
80°
37°
21
Hist. Avg.
80°
37°
22
Hist. Avg.
79°
37°
23
Hist. Avg.
79°
36°
24
Hist. Avg.
78°
36°
25
Hist. Avg.
78°
36°
26
Hist. Avg.
77°
36°
27
Hist. Avg.
77°
36°
28
Hist. Avg.
76°
35°
29
Hist. Avg.
76°
35°
30
Hist. Avg.
75°
35°
1
Hist. Avg.
75°
34°
2
Hist. Avg.
74°
34°
3
Hist. Avg.
74°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Alturas
Alturas's September 2026 forecast shows daily high temperatures ranging from 75° to 90°, with overnight lows between 34° and 45°. The average high for September is 83° with an average low of 41°. 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.
