S
M
T
W
T
F
S
30
98°
69°
31
97°
69°
1
100°
69°
2
103°
75°
3
103°
75°
4
104°
74°
5
101°
65°
6
92°
70°
7
102°
72°
8
102°
75°
9
90°
69°
10
90°
71°
11
94°
64°
12
80°
60°
13
86°
60°
14
100°
68°
15
72°
59°
16
88°
57°
17
99°
64°
18
101°
75°
19
86°
66°
20
73°
62°
21
83°
59°
22
78°
60°
23
72°
57°
24
66°
63°
25
74°
63°
26
78°
61°
27
78°
60°
28
77°
64°
29
72°
53°
30
75°
52°
1
72°
49°
2
74°
50°
3
69°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Kirwin
Kirwin's September 2026 forecast shows daily high temperatures ranging from 66° to 78°, with overnight lows between 46° and 64°. The average high for September is 74° 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 Kirwin. See also: October | November | December.
