S
M
T
W
T
F
S
30
81°
60°
31
77°
61°
1
82°
61°
2
83°
58°
3
83°
51°
4
75°
52°
5
74°
59°
6
81°
54°
7
79°
51°
8
74°
53°
9
73°
56°
10
74°
58°
11
76°
57°
12
81°
58°
13
81°
57°
14
80°
50°
15
79°
49°
16
70°
52°
17
71°
47°
18
71°
47°
19
70°
44°
20
68°
43°
21
67°
46°
22
69°
52°
23
71°
45°
24
73°
51°
25
74°
53°
26
72°
52°
27
76°
53°
28
75°
48°
29
74°
47°
30
67°
48°
1
69°
47°
2
74°
49°
3
66°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mendota
Mendota's September 2026 forecast shows daily high temperatures ranging from 66° to 83°, with overnight lows between 40° and 61°. The average high for September is 75° 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 Mendota. See also: October | November | December.
