S
M
T
W
T
F
S
30
71°
47°
31
70°
48°
1
69°
49°
2
69°
47°
3
71°
49°
4
76°
52°
5
70°
52°
6
69°
50°
7
75°
47°
8
73°
54°
9
73°
55°
10
75°
47°
11
71°
44°
12
66°
43°
13
65°
43°
14
63°
42°
15
62°
41°
16
63°
43°
17
65°
42°
18
66°
47°
19
71°
43°
20
68°
41°
21
64°
40°
22
60°
39°
23
60°
40°
24
Hist. Avg.
65°
41°
25
Hist. Avg.
64°
41°
26
Hist. Avg.
64°
40°
27
Hist. Avg.
63°
40°
28
Hist. Avg.
63°
40°
29
Hist. Avg.
63°
39°
30
Hist. Avg.
62°
39°
1
Hist. Avg.
62°
39°
2
Hist. Avg.
61°
38°
3
Hist. Avg.
61°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Garrison
Garrison's September 2026 forecast shows daily high temperatures ranging from 60° to 76°, with overnight lows between 39° and 55°. The average high for September is 68° with an average low of 46°. 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 Garrison. See also: October | November | December.
