S
M
T
W
T
F
S
30
101°
68°
31
100°
66°
1
102°
68°
2
102°
71°
3
103°
69°
4
102°
66°
5
101°
67°
6
99°
66°
7
95°
65°
8
96°
62°
9
95°
62°
10
95°
63°
11
96°
63°
12
97°
62°
13
99°
64°
14
99°
66°
15
98°
65°
16
96°
61°
17
94°
63°
18
95°
61°
19
94°
60°
20
96°
59°
21
96°
63°
22
95°
65°
23
92°
64°
24
89°
65°
25
88°
64°
26
87°
58°
27
88°
61°
28
89°
60°
29
89°
63°
30
88°
60°
1
Hist. Avg.
92°
68°
2
Hist. Avg.
92°
68°
3
Hist. Avg.
91°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Tonto Basin
Tonto Basin's September 2026 forecast shows daily high temperatures ranging from 87° to 103°, with overnight lows between 58° and 71°. The average high for September is 96° with an average low of 64°. 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 Tonto Basin. See also: October | November | December.
