S
M
T
W
T
F
S
30
57°
43°
31
56°
40°
1
55°
38°
2
54°
36°
3
53°
35°
4
53°
35°
5
54°
36°
6
52°
35°
7
53°
34°
8
51°
33°
9
51°
32°
10
52°
32°
11
51°
31°
12
51°
32°
13
52°
40°
14
50°
39°
15
53°
36°
16
51°
27°
17
55°
38°
18
48°
38°
19
54°
37°
20
51°
33°
21
48°
36°
22
50°
35°
23
48°
34°
24
44°
35°
25
47°
32°
26
48°
31°
27
42°
32°
28
44°
33°
29
47°
33°
30
48°
33°
1
Hist. Avg.
40°
26°
2
Hist. Avg.
39°
26°
3
Hist. Avg.
38°
25°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Ruby
Ruby's September 2026 forecast shows daily high temperatures ranging from 42° to 57°, with overnight lows between 27° and 43°. The average high for September is 51° with an average low of 35°. 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 Ruby. See also: October | November | December.