S
M
T
W
T
F
S
30
79°
53°
31
74°
47°
1
73°
48°
2
72°
48°
3
72°
49°
4
73°
48°
5
72°
48°
6
70°
49°
7
69°
50°
8
71°
52°
9
70°
48°
10
70°
47°
11
69°
47°
12
68°
48°
13
69°
49°
14
68°
48°
15
67°
51°
16
68°
45°
17
69°
44°
18
69°
45°
19
68°
52°
20
66°
50°
21
71°
48°
22
Hist. Avg.
72°
51°
23
Hist. Avg.
72°
51°
24
Hist. Avg.
71°
50°
25
Hist. Avg.
71°
50°
26
Hist. Avg.
70°
50°
27
Hist. Avg.
70°
49°
28
Hist. Avg.
70°
49°
29
Hist. Avg.
69°
49°
30
Hist. Avg.
69°
48°
1
Hist. Avg.
68°
48°
2
Hist. Avg.
68°
48°
3
Hist. Avg.
68°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Coupon
Coupon's September 2026 forecast shows daily high temperatures ranging from 66° to 79°, with overnight lows between 44° and 53°. The average high for September is 70° 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 Coupon. See also: October | November | December.
