S
M
T
W
T
F
S
30
66°
45°
31
68°
46°
1
70°
52°
2
71°
53°
3
75°
52°
4
76°
52°
5
76°
45°
6
73°
51°
7
70°
51°
8
72°
49°
9
62°
49°
10
64°
50°
11
63°
51°
12
67°
52°
13
61°
51°
14
70°
44°
15
59°
38°
16
62°
39°
17
69°
47°
18
67°
43°
19
Hist. Avg.
75°
39°
20
Hist. Avg.
75°
39°
21
Hist. Avg.
74°
38°
22
Hist. Avg.
74°
38°
23
Hist. Avg.
73°
38°
24
Hist. Avg.
73°
38°
25
Hist. Avg.
72°
38°
26
Hist. Avg.
72°
37°
27
Hist. Avg.
71°
37°
28
Hist. Avg.
71°
37°
29
Hist. Avg.
70°
36°
30
Hist. Avg.
70°
36°
1
Hist. Avg.
69°
36°
2
Hist. Avg.
69°
36°
3
Hist. Avg.
68°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Clarkia
Clarkia's September 2026 forecast shows daily high temperatures ranging from 59° to 76°, with overnight lows between 38° and 53°. The average high for September is 68° with an average low of 48°. 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 Clarkia. See also: October | November | December.