S
M
T
W
T
F
S
30
74°
59°
31
75°
59°
1
70°
54°
2
70°
53°
3
69°
54°
4
69°
57°
5
69°
53°
6
68°
52°
7
73°
58°
8
75°
57°
9
75°
58°
10
69°
57°
11
69°
55°
12
73°
57°
13
69°
54°
14
68°
54°
15
71°
56°
16
74°
56°
17
75°
55°
18
73°
51°
19
65°
49°
20
64°
51°
21
68°
53°
22
66°
52°
23
70°
49°
24
62°
46°
25
61°
45°
26
61°
44°
27
62°
44°
28
61°
48°
29
65°
47°
30
65°
51°
1
66°
44°
2
59°
44°
3
58°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Clymer
Clymer's September 2026 forecast shows daily high temperatures ranging from 58° to 75°, with overnight lows between 44° and 59°. The average high for September is 68° 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 Clymer. See also: October | November | December.