S
M
T
W
T
F
S
30
81°
63°
31
81°
64°
1
82°
64°
2
81°
59°
3
80°
55°
4
79°
55°
5
77°
56°
6
79°
55°
7
81°
56°
8
83°
62°
9
84°
62°
10
82°
54°
11
78°
55°
12
78°
58°
13
79°
52°
14
77°
53°
15
74°
52°
16
75°
51°
17
76°
55°
18
77°
52°
19
79°
55°
20
77°
56°
21
81°
56°
22
78°
57°
23
81°
57°
24
75°
56°
25
77°
57°
26
79°
56°
27
80°
56°
28
81°
55°
29
81°
55°
30
80°
54°
1
80°
55°
2
79°
48°
3
79°
44°
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 74° to 84°, with overnight lows between 44° and 64°. 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 Claremont. See also: October | November | December.
