S
M
T
W
T
F
S
30
89°
60°
31
90°
61°
1
89°
60°
2
89°
61°
3
88°
57°
4
87°
60°
5
87°
57°
6
86°
56°
7
87°
57°
8
87°
50°
9
77°
50°
10
77°
45°
11
78°
50°
12
79°
46°
13
74°
44°
14
73°
42°
15
73°
44°
16
75°
46°
17
76°
49°
18
73°
49°
19
74°
48°
20
75°
45°
21
74°
43°
22
74°
46°
23
Hist. Avg.
N/A
24
Hist. Avg.
N/A
25
Hist. Avg.
N/A
26
Hist. Avg.
N/A
27
Hist. Avg.
N/A
28
Hist. Avg.
N/A
29
Hist. Avg.
N/A
30
Hist. Avg.
N/A
1
Hist. Avg.
N/A
2
Hist. Avg.
N/A
3
Hist. Avg.
N/A
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Monitor
Monitor's September 2026 forecast shows daily high temperatures ranging from 73° to 90°, with overnight lows between 42° and 61°. The average high for September is 80° with an average low of 51°. 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 Monitor. See also: October | November | December.
