S
M
T
W
T
F
S
30
76°
50°
31
76°
54°
1
78°
57°
2
81°
58°
3
84°
52°
4
84°
56°
5
82°
49°
6
74°
51°
7
81°
56°
8
75°
47°
9
72°
51°
10
74°
56°
11
71°
52°
12
72°
56°
13
72°
55°
14
71°
48°
15
69°
46°
16
70°
45°
17
78°
54°
18
79°
47°
19
Hist. Avg.
75°
49°
20
Hist. Avg.
75°
49°
21
Hist. Avg.
74°
49°
22
Hist. Avg.
74°
48°
23
Hist. Avg.
74°
48°
24
Hist. Avg.
73°
48°
25
Hist. Avg.
73°
48°
26
Hist. Avg.
73°
48°
27
Hist. Avg.
72°
48°
28
Hist. Avg.
72°
47°
29
Hist. Avg.
71°
47°
30
Hist. Avg.
71°
47°
1
Hist. Avg.
70°
47°
2
Hist. Avg.
70°
46°
3
Hist. Avg.
70°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Cougar
Cougar's September 2026 forecast shows daily high temperatures ranging from 69° to 84°, with overnight lows between 45° and 58°. The average high for September is 76° with an average low of 52°. 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 Cougar. See also: October | November | December.
