S
M
T
W
T
F
S
30
76°
45°
31
75°
44°
1
75°
46°
2
76°
47°
3
74°
49°
4
75°
45°
5
77°
45°
6
76°
44°
7
74°
42°
8
75°
43°
9
74°
47°
10
73°
44°
11
73°
41°
12
72°
42°
13
73°
43°
14
76°
47°
15
75°
47°
16
78°
48°
17
78°
45°
18
73°
40°
19
75°
46°
20
76°
40°
21
69°
41°
22
70°
45°
23
73°
45°
24
74°
46°
25
75°
43°
26
74°
37°
27
70°
37°
28
66°
38°
29
65°
38°
30
65°
36°
1
Hist. Avg.
66°
48°
2
Hist. Avg.
66°
48°
3
Hist. Avg.
66°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Clarence
Clarence's September 2026 forecast shows daily high temperatures ranging from 65° to 78°, with overnight lows between 36° and 49°. The average high for September is 73° with an average low of 43°. 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 Clarence. See also: October | November | December.