S
M
T
W
T
F
S
30
88°
57°
31
89°
60°
1
90°
61°
2
91°
64°
3
93°
65°
4
93°
64°
5
91°
63°
6
90°
63°
7
91°
62°
8
92°
60°
9
87°
58°
10
86°
56°
11
84°
57°
12
84°
58°
13
85°
56°
14
84°
54°
15
83°
56°
16
83°
56°
17
85°
53°
18
85°
53°
19
86°
52°
20
84°
51°
21
85°
50°
22
86°
51°
23
86°
58°
24
85°
58°
25
85°
53°
26
87°
54°
27
88°
57°
28
89°
55°
29
88°
54°
30
88°
56°
1
89°
51°
2
86°
50°
3
86°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Sierra Vista
Sierra Vista's September 2026 forecast shows daily high temperatures ranging from 83° to 93°, with overnight lows between 50° and 65°. The average high for September is 87° with an average low of 57°. 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 Sierra Vista. See also: October | November | December.
