S
M
T
W
T
F
S
30
84°
66°
31
86°
62°
1
87°
57°
2
79°
59°
3
78°
65°
4
85°
64°
5
84°
55°
6
85°
55°
7
77°
61°
8
79°
62°
9
82°
56°
10
82°
61°
11
74°
57°
12
76°
53°
13
74°
51°
14
73°
52°
15
73°
54°
16
74°
58°
17
80°
59°
18
81°
60°
19
81°
58°
20
75°
57°
21
80°
58°
22
79°
49°
23
81°
49°
24
77°
48°
25
69°
48°
26
70°
47°
27
Hist. Avg.
75°
49°
28
Hist. Avg.
75°
48°
29
Hist. Avg.
74°
48°
30
Hist. Avg.
74°
48°
1
Hist. Avg.
74°
47°
2
Hist. Avg.
73°
47°
3
Hist. Avg.
73°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Plattsburg
Plattsburg's September 2026 forecast shows daily high temperatures ranging from 69° to 87°, with overnight lows between 47° and 66°. The average high for September is 79° 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 Plattsburg. See also: October | November | December.
