S
M
T
W
T
F
S
30
79°
64°
31
86°
59°
1
82°
54°
2
82°
61°
3
90°
63°
4
82°
63°
5
82°
61°
6
82°
64°
7
79°
64°
8
86°
55°
9
75°
52°
10
81°
46°
11
88°
63°
12
68°
46°
13
66°
43°
14
61°
43°
15
68°
46°
16
70°
43°
17
70°
48°
18
59°
54°
19
61°
52°
20
63°
50°
21
55°
45°
22
63°
41°
23
65°
53°
24
59°
55°
25
64°
57°
26
61°
56°
27
69°
54°
28
65°
53°
29
60°
47°
30
58°
44°
1
60°
45°
2
59°
43°
3
65°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Clarissa
Clarissa's September 2026 forecast shows daily high temperatures ranging from 58° to 69°, with overnight lows between 43° and 57°. The average high for September is 62° with an average low of 50°. 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 Clarissa. See also: October | November | December.