S
M
T
W
T
F
S
30
78°
46°
31
81°
46°
1
82°
48°
2
85°
50°
3
85°
51°
4
87°
55°
5
87°
54°
6
86°
48°
7
84°
53°
8
84°
48°
9
75°
43°
10
72°
45°
11
74°
50°
12
76°
49°
13
74°
52°
14
72°
41°
15
71°
45°
16
71°
41°
17
Hist. Avg.
76°
45°
18
Hist. Avg.
76°
44°
19
Hist. Avg.
75°
44°
20
Hist. Avg.
75°
44°
21
Hist. Avg.
74°
44°
22
Hist. Avg.
74°
43°
23
Hist. Avg.
74°
43°
24
Hist. Avg.
73°
43°
25
Hist. Avg.
72°
42°
26
Hist. Avg.
72°
42°
27
Hist. Avg.
72°
42°
28
Hist. Avg.
71°
42°
29
Hist. Avg.
71°
41°
30
Hist. Avg.
70°
41°
1
Hist. Avg.
70°
40°
2
Hist. Avg.
69°
40°
3
Hist. Avg.
69°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Rupert
Rupert's September 2026 forecast shows daily high temperatures ranging from 71° to 87°, with overnight lows between 41° and 55°. The average high for September is 79° with an average low of 48°. 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 Rupert. See also: October | November | December.
