S
M
T
W
T
F
S
30
79°
54°
31
91°
60°
1
87°
55°
2
81°
55°
3
75°
54°
4
74°
52°
5
77°
54°
6
78°
55°
7
80°
56°
8
82°
53°
9
80°
52°
10
84°
53°
11
76°
48°
12
77°
54°
13
76°
54°
14
76°
48°
15
79°
55°
16
84°
57°
17
84°
52°
18
72°
49°
19
71°
48°
20
71°
45°
21
72°
45°
22
71°
46°
23
72°
47°
24
77°
51°
25
79°
55°
26
74°
47°
27
68°
44°
28
67°
43°
29
68°
42°
30
68°
46°
1
72°
45°
2
66°
42°
3
65°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Clarkston
Clarkston's September 2026 forecast shows daily high temperatures ranging from 65° to 91°, with overnight lows between 42° and 60°. The average high for September is 76° 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 Clarkston. See also: October | November | December.
