S
M
T
W
T
F
S
30
77°
57°
31
76°
56°
1
75°
57°
2
76°
61°
3
76°
57°
4
77°
56°
5
77°
55°
6
76°
56°
7
74°
53°
8
75°
54°
9
74°
60°
10
74°
54°
11
73°
52°
12
73°
53°
13
74°
56°
14
76°
56°
15
78°
58°
16
79°
58°
17
79°
57°
18
78°
57°
19
77°
56°
20
77°
49°
21
70°
53°
22
70°
56°
23
74°
55°
24
75°
56°
25
76°
52°
26
74°
47°
27
69°
47°
28
66°
48°
29
65°
48°
30
65°
46°
1
65°
52°
2
Hist. Avg.
69°
49°
3
Hist. Avg.
68°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Imperial
Imperial's September 2026 forecast shows daily high temperatures ranging from 65° to 79°, with overnight lows between 46° and 61°. The average high for September is 74° with an average low of 54°. 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 Imperial. See also: October | November | December.
