S
M
T
W
T
F
S
30
103°
78°
31
103°
78°
1
100°
76°
2
103°
76°
3
102°
76°
4
102°
74°
5
103°
75°
6
101°
76°
7
102°
78°
8
102°
78°
9
104°
75°
10
95°
72°
11
101°
73°
12
102°
71°
13
93°
69°
14
92°
67°
15
90°
63°
16
97°
69°
17
92°
68°
18
92°
65°
19
84°
58°
20
79°
64°
21
89°
65°
22
88°
64°
23
88°
64°
24
81°
63°
25
76°
63°
26
79°
62°
27
80°
62°
28
83°
61°
29
82°
61°
30
83°
52°
1
72°
48°
2
72°
49°
3
70°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Watonga
Watonga's September 2026 forecast shows daily high temperatures ranging from 70° to 104°, with overnight lows between 48° and 78°. The average high for September is 88° with an average low of 65°. 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 Watonga. See also: October | November | December.