S
M
T
W
T
F
S
30
77°
48°
31
76°
46°
1
77°
43°
2
75°
48°
3
75°
50°
4
76°
42°
5
72°
43°
6
73°
42°
7
74°
45°
8
73°
44°
9
75°
43°
10
74°
42°
11
71°
44°
12
71°
40°
13
72°
42°
14
73°
45°
15
Hist. Avg.
74°
43°
16
Hist. Avg.
74°
43°
17
Hist. Avg.
74°
42°
18
Hist. Avg.
73°
42°
19
Hist. Avg.
73°
42°
20
Hist. Avg.
72°
41°
21
Hist. Avg.
72°
41°
22
Hist. Avg.
71°
41°
23
Hist. Avg.
71°
40°
24
Hist. Avg.
70°
40°
25
Hist. Avg.
70°
40°
26
Hist. Avg.
69°
40°
27
Hist. Avg.
69°
39°
28
Hist. Avg.
68°
39°
29
Hist. Avg.
68°
38°
30
Hist. Avg.
67°
38°
1
Hist. Avg.
66°
38°
2
Hist. Avg.
66°
38°
3
Hist. Avg.
65°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Rexburg
Rexburg's September 2026 forecast shows daily high temperatures ranging from 71° to 77°, with overnight lows between 40° and 50°. The average high for September is 74° with an average low of 44°. 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.
