S
M
T
W
T
F
S
30
101°
74°
31
97°
65°
1
97°
65°
2
98°
65°
3
101°
71°
4
100°
71°
5
101°
65°
6
98°
68°
7
97°
72°
8
99°
73°
9
98°
70°
10
97°
65°
11
102°
62°
12
99°
67°
13
102°
64°
14
96°
68°
15
93°
65°
16
85°
64°
17
91°
69°
18
92°
65°
19
91°
62°
20
91°
62°
21
85°
56°
22
84°
60°
23
N/A
24
81°
61°
25
77°
59°
26
88°
57°
27
86°
58°
28
82°
61°
29
74°
56°
30
77°
52°
1
76°
54°
2
83°
54°
3
82°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Fort Sumner
Fort Sumner's September 2026 forecast shows daily high temperatures ranging from 74° to 88°, with overnight lows between 52° and 61°. The average high for September is 81° with an average low of 56°. 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 Fort Sumner. See also: October | November | December.
