S
M
T
W
T
F
S
30
90°
59°
31
89°
60°
1
89°
61°
2
90°
60°
3
89°
61°
4
88°
62°
5
88°
60°
6
89°
60°
7
95°
55°
8
92°
54°
9
90°
53°
10
89°
52°
11
88°
53°
12
89°
54°
13
88°
55°
14
89°
59°
15
88°
60°
16
88°
60°
17
92°
59°
18
94°
60°
19
92°
60°
20
94°
59°
21
94°
58°
22
92°
57°
23
88°
56°
24
88°
54°
25
84°
57°
26
88°
57°
27
91°
56°
28
90°
55°
29
90°
56°
30
88°
57°
1
89°
59°
2
91°
58°
3
89°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Merced
Merced's September 2026 forecast shows daily high temperatures ranging from 84° to 95°, with overnight lows between 52° and 62°. The average high for September is 90° with an average low of 58°. 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 Merced. See also: October | November | December.
