S
M
T
W
T
F
S
30
71°
37°
31
72°
39°
1
74°
38°
2
69°
44°
3
72°
43°
4
74°
37°
5
67°
34°
6
66°
35°
7
66°
35°
8
67°
36°
9
67°
36°
10
66°
35°
11
65°
34°
12
65°
31°
13
66°
35°
14
70°
39°
15
Hist. Avg.
73°
45°
16
Hist. Avg.
72°
44°
17
Hist. Avg.
72°
44°
18
Hist. Avg.
72°
44°
19
Hist. Avg.
71°
44°
20
Hist. Avg.
71°
43°
21
Hist. Avg.
70°
43°
22
Hist. Avg.
70°
43°
23
Hist. Avg.
69°
43°
24
Hist. Avg.
69°
42°
25
Hist. Avg.
68°
42°
26
Hist. Avg.
68°
42°
27
Hist. Avg.
67°
42°
28
Hist. Avg.
67°
41°
29
Hist. Avg.
66°
41°
30
Hist. Avg.
66°
41°
1
Hist. Avg.
66°
40°
2
Hist. Avg.
65°
40°
3
Hist. Avg.
65°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Monarch
Monarch's September 2026 forecast shows daily high temperatures ranging from 65° to 74°, with overnight lows between 31° and 44°. The average high for September is 69° with an average low of 37°. 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 Monarch. See also: October | November | December.
