S
M
T
W
T
F
S
30
83°
65°
31
87°
67°
1
85°
60°
2
87°
62°
3
83°
69°
4
91°
66°
5
86°
68°
6
80°
66°
7
80°
66°
8
81°
64°
9
83°
57°
10
73°
53°
11
76°
57°
12
73°
58°
13
77°
55°
14
78°
56°
15
79°
57°
16
71°
47°
17
75°
54°
18
74°
51°
19
74°
52°
20
75°
52°
21
73°
51°
22
73°
49°
23
72°
52°
24
74°
51°
25
73°
47°
26
63°
41°
27
60°
38°
28
59°
37°
29
66°
38°
30
60°
37°
1
59°
45°
2
59°
43°
3
58°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Claremont
Claremont's September 2026 forecast shows daily high temperatures ranging from 58° to 91°, with overnight lows between 37° and 69°. The average high for September is 73° 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 Claremont. See also: October | November | December.
