S
M
T
W
T
F
S
30
80°
57°
31
79°
58°
1
77°
56°
2
75°
52°
3
70°
48°
4
71°
53°
5
75°
55°
6
78°
56°
7
79°
56°
8
78°
54°
9
74°
52°
10
75°
55°
11
68°
49°
12
69°
50°
13
67°
48°
14
69°
45°
15
67°
42°
16
66°
39°
17
66°
44°
18
65°
40°
19
64°
38°
20
64°
40°
21
65°
40°
22
68°
48°
23
71°
48°
24
73°
49°
25
74°
50°
26
74°
48°
27
72°
40°
28
71°
47°
29
66°
36°
30
62°
47°
1
66°
43°
2
71°
36°
3
69°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Clare
Clare's September 2026 forecast shows daily high temperatures ranging from 62° to 80°, with overnight lows between 35° and 58°. The average high for September is 71° with an average low of 47°. 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 Clare. See also: October | November | December.