S
M
T
W
T
F
S
30
79°
49°
31
78°
52°
1
74°
53°
2
76°
53°
3
79°
52°
4
80°
48°
5
78°
51°
6
74°
52°
7
70°
57°
8
74°
56°
9
74°
57°
10
76°
58°
11
78°
59°
12
77°
57°
13
77°
57°
14
78°
56°
15
73°
57°
16
70°
56°
17
71°
57°
18
70°
57°
19
71°
59°
20
72°
58°
21
69°
58°
22
68°
57°
23
67°
58°
24
68°
58°
25
68°
57°
26
69°
58°
27
68°
58°
28
68°
57°
29
69°
58°
30
69°
58°
1
70°
56°
2
66°
53°
3
67°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cinco de Mayo
Cinco de Mayo's September 2026 forecast shows daily high temperatures ranging from 66° to 78°, with overnight lows between 53° and 59°. The average high for September is 71° with an average low of 57°. 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 Cinco de Mayo. See also: October | November | December.
