S
M
T
W
T
F
S
30
83°
54°
31
81°
53°
1
80°
54°
2
74°
52°
3
73°
49°
4
75°
51°
5
80°
52°
6
72°
48°
7
70°
40°
8
71°
42°
9
73°
44°
10
78°
48°
11
79°
49°
12
80°
48°
13
80°
49°
14
74°
41°
15
71°
45°
16
73°
45°
17
72°
46°
18
73°
45°
19
72°
46°
20
75°
44°
21
73°
45°
22
74°
44°
23
77°
44°
24
77°
47°
25
76°
47°
26
72°
46°
27
74°
45°
28
74°
44°
29
71°
35°
30
62°
48°
1
67°
43°
2
60°
32°
3
59°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Rexburg
Rexburg's September 2026 forecast shows daily high temperatures ranging from 59° to 83°, with overnight lows between 32° and 54°. The average high for September is 74° with an average low of 46°. 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 Rexburg. See also: October | November | December.
