S
M
T
W
T
F
S
30
90°
67°
31
92°
68°
1
94°
68°
2
93°
67°
3
93°
66°
4
92°
66°
5
87°
65°
6
85°
66°
7
88°
66°
8
87°
65°
9
84°
64°
10
82°
64°
11
85°
63°
12
89°
64°
13
91°
64°
14
91°
63°
15
88°
63°
16
80°
62°
17
79°
62°
18
82°
62°
19
86°
62°
20
85°
61°
21
88°
54°
22
80°
51°
23
80°
53°
24
82°
54°
25
83°
50°
26
77°
55°
27
81°
56°
28
86°
56°
29
79°
51°
30
85°
44°
1
74°
45°
2
70°
48°
3
71°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Guymon
Guymon's September 2026 forecast shows daily high temperatures ranging from 70° to 94°, with overnight lows between 44° and 68°. The average high for September is 85° with an average low of 59°. 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 Guymon. See also: October | November | December.
