S
M
T
W
T
F
S
30
78°
57°
31
77°
59°
1
78°
60°
2
78°
57°
3
77°
50°
4
69°
49°
5
69°
55°
6
72°
59°
7
76°
58°
8
76°
57°
9
73°
50°
10
71°
57°
11
75°
56°
12
75°
58°
13
74°
58°
14
75°
57°
15
75°
54°
16
73°
52°
17
70°
52°
18
73°
48°
19
65°
45°
20
64°
44°
21
62°
43°
22
63°
53°
23
65°
49°
24
65°
44°
25
62°
44°
26
63°
51°
27
69°
52°
28
70°
50°
29
69°
46°
30
66°
48°
1
61°
49°
2
67°
42°
3
60°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Walsh
Walsh's September 2026 forecast shows daily high temperatures ranging from 60° to 78°, with overnight lows between 42° and 60°. The average high for September is 70° with an average low of 52°. 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 Walsh. See also: October | November | December.