S
M
T
W
T
F
S
30
94°
70°
31
93°
70°
1
92°
69°
2
90°
70°
3
91°
68°
4
91°
69°
5
93°
70°
6
92°
69°
7
Hist. Avg.
92°
72°
8
Hist. Avg.
92°
71°
9
Hist. Avg.
92°
71°
10
Hist. Avg.
92°
71°
11
Hist. Avg.
92°
70°
12
Hist. Avg.
91°
70°
13
Hist. Avg.
91°
70°
14
Hist. Avg.
91°
70°
15
Hist. Avg.
90°
69°
16
Hist. Avg.
90°
69°
17
Hist. Avg.
90°
68°
18
Hist. Avg.
90°
68°
19
Hist. Avg.
90°
68°
20
Hist. Avg.
89°
67°
21
Hist. Avg.
89°
67°
22
Hist. Avg.
89°
66°
23
Hist. Avg.
88°
66°
24
Hist. Avg.
88°
66°
25
Hist. Avg.
88°
65°
26
Hist. Avg.
88°
65°
27
Hist. Avg.
87°
64°
28
Hist. Avg.
87°
64°
29
Hist. Avg.
87°
64°
30
Hist. Avg.
86°
63°
1
Hist. Avg.
86°
63°
2
Hist. Avg.
86°
62°
3
Hist. Avg.
86°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Ajax
Ajax's September 2026 forecast shows daily high temperatures ranging from 90° to 94°, with overnight lows between 68° and 70°. The average high for September is 92° with an average low of 69°. 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 Ajax. See also: October | November | December.
