S
M
T
W
T
F
S
30
96°
59°
31
98°
62°
1
98°
74°
2
97°
70°
3
97°
69°
4
98°
72°
5
102°
71°
6
99°
70°
7
94°
68°
8
99°
60°
9
100°
76°
10
92°
71°
11
82°
69°
12
95°
63°
13
N/A
14
94°
73°
15
98°
72°
16
97°
73°
17
98°
68°
18
94°
68°
19
93°
67°
20
84°
62°
21
78°
57°
22
79°
57°
23
79°
58°
24
81°
57°
25
81°
59°
26
82°
57°
27
84°
59°
28
83°
59°
29
82°
58°
30
83°
59°
1
83°
59°
2
82°
58°
3
83°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Mammoth Spring
Mammoth Spring's September 2026 forecast shows daily high temperatures ranging from 78° to 98°, with overnight lows between 57° and 73°. The average high for September is 86° with an average low of 62°. 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 Mammoth Spring. See also: October | November | December.
