S
M
T
W
T
F
S
30
76°
52°
31
81°
55°
1
81°
46°
2
79°
45°
3
72°
46°
4
74°
49°
5
77°
55°
6
79°
50°
7
78°
45°
8
71°
49°
9
71°
53°
10
72°
53°
11
76°
51°
12
74°
50°
13
70°
50°
14
68°
44°
15
69°
43°
16
68°
41°
17
68°
46°
18
69°
46°
19
72°
48°
20
69°
50°
21
72°
47°
22
68°
39°
23
66°
45°
24
65°
48°
25
69°
43°
26
63°
42°
27
69°
46°
28
70°
45°
29
Hist. Avg.
66°
43°
30
Hist. Avg.
66°
42°
1
Hist. Avg.
65°
42°
2
Hist. Avg.
65°
42°
3
Hist. Avg.
64°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Claremont
Claremont's September 2026 forecast shows daily high temperatures ranging from 63° to 81°, with overnight lows between 39° and 55°. The average high for September is 72° with an average low of 47°. 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.
