S
M
T
W
T
F
S
30
93°
73°
31
93°
73°
1
91°
77°
2
95°
77°
3
91°
75°
4
93°
73°
5
95°
75°
6
95°
74°
7
91°
74°
8
92°
74°
9
93°
76°
10
94°
75°
11
93°
73°
12
92°
74°
13
91°
73°
14
92°
72°
15
90°
72°
16
90°
73°
17
92°
73°
18
92°
72°
19
91°
71°
20
89°
73°
21
87°
74°
22
88°
73°
23
87°
72°
24
87°
73°
25
88°
73°
26
88°
72°
27
89°
73°
28
88°
73°
29
89°
72°
30
89°
72°
1
86°
71°
2
87°
72°
3
88°
71°
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 86° to 95°, with overnight lows between 71° and 76°. The average high for September is 90° with an average low of 73°. 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.
