S
M
T
W
T
F
S
30
87°
63°
31
89°
62°
1
87°
65°
2
89°
64°
3
89°
67°
4
92°
65°
5
92°
63°
6
90°
63°
7
92°
65°
8
92°
63°
9
91°
60°
10
89°
62°
11
87°
58°
12
81°
59°
13
88°
58°
14
85°
56°
15
80°
60°
16
83°
57°
17
87°
60°
18
88°
58°
19
82°
57°
20
83°
58°
21
84°
59°
22
83°
56°
23
84°
58°
24
82°
55°
25
76°
55°
26
77°
57°
27
84°
51°
28
81°
50°
29
76°
50°
30
80°
45°
1
78°
44°
2
72°
45°
3
74°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fort Sumner
Fort Sumner's September 2026 forecast shows daily high temperatures ranging from 72° to 92°, with overnight lows between 44° and 67°. The average high for September is 84° with an average low of 57°. 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.
