S
M
T
W
T
F
S
30
94°
70°
31
102°
73°
1
97°
70°
2
99°
69°
3
98°
70°
4
98°
70°
5
97°
71°
6
N/A
7
86°
77°
8
85°
77°
9
86°
76°
10
86°
77°
11
85°
77°
12
91°
77°
13
90°
80°
14
92°
79°
15
91°
79°
16
93°
78°
17
93°
76°
18
94°
77°
19
91°
78°
20
92°
77°
21
91°
78°
22
92°
79°
23
93°
78°
24
93°
79°
25
91°
79°
26
90°
78°
27
91°
79°
28
89°
78°
29
89°
78°
30
90°
78°
1
90°
79°
2
91°
79°
3
92°
78°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Merca
Merca's September 2026 forecast shows daily high temperatures ranging from 85° to 94°, with overnight lows between 76° and 80°. The average high for September is 90° with an average low of 78°. 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 Merca. See also: October | November | December.
