S
M
T
W
T
F
S
30
83°
52°
31
73°
51°
1
73°
57°
2
77°
58°
3
72°
51°
4
72°
59°
5
80°
54°
6
78°
51°
7
74°
50°
8
71°
50°
9
71°
48°
10
70°
55°
11
74°
48°
12
71°
48°
13
70°
47°
14
72°
54°
15
75°
50°
16
72°
46°
17
71°
45°
18
65°
44°
19
65°
46°
20
66°
48°
21
65°
48°
22
63°
45°
23
65°
51°
24
69°
51°
25
70°
52°
26
72°
52°
27
71°
46°
28
68°
42°
29
62°
43°
30
63°
51°
1
62°
52°
2
66°
49°
3
68°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Westmoreland
Westmoreland's September 2026 forecast shows daily high temperatures ranging from 62° to 83°, with overnight lows between 42° and 59°. The average high for September is 70° with an average low of 50°. 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 Westmoreland. See also: October | November | December.