S
M
T
W
T
F
S
30
92°
67°
31
92°
68°
1
91°
67°
2
92°
68°
3
92°
68°
4
91°
67°
5
92°
65°
6
91°
61°
7
85°
57°
8
85°
60°
9
86°
64°
10
88°
64°
11
86°
58°
12
82°
61°
13
80°
62°
14
80°
64°
15
88°
53°
16
88°
53°
17
77°
54°
18
76°
53°
19
76°
52°
20
75°
51°
21
75°
52°
22
76°
51°
23
76°
51°
24
77°
53°
25
76°
59°
26
80°
58°
27
80°
60°
28
82°
57°
29
81°
49°
30
75°
51°
1
74°
50°
2
73°
48°
3
72°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Siloam Springs
Siloam Springs's September 2026 forecast shows daily high temperatures ranging from 72° to 92°, with overnight lows between 48° and 68°. The average high for September is 82° with an average low of 58°. 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 Siloam Springs. See also: October | November | December.
