S
M
T
W
T
F
S
30
107°
86°
31
99°
85°
1
103°
81°
2
104°
85°
3
106°
82°
4
106°
86°
5
103°
82°
6
107°
82°
7
108°
80°
8
109°
83°
9
107°
89°
10
109°
88°
11
107°
91°
12
105°
80°
13
104°
82°
14
106°
84°
15
103°
84°
16
98°
77°
17
95°
74°
18
101°
75°
19
103°
72°
20
101°
74°
21
100°
71°
22
100°
75°
23
101°
75°
24
97°
73°
25
98°
72°
26
100°
81°
27
98°
80°
28
100°
77°
29
106°
78°
30
104°
74°
1
102°
71°
2
98°
66°
3
96°
74°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Ajo
Ajo's September 2026 forecast shows daily high temperatures ranging from 96° to 106°, with overnight lows between 66° and 81°. The average high for September is 100° with an average low of 74°. 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 Ajo. See also: October | November | December.