S
M
T
W
T
F
S
30
74°
54°
31
72°
58°
1
75°
55°
2
79°
53°
3
72°
54°
4
70°
49°
5
66°
45°
6
56°
40°
7
61°
39°
8
70°
49°
9
75°
48°
10
76°
55°
11
63°
47°
12
56°
39°
13
57°
36°
14
72°
48°
15
74°
49°
16
73°
48°
17
77°
52°
18
75°
49°
19
67°
50°
20
72°
49°
21
75°
48°
22
76°
55°
23
77°
49°
24
69°
43°
25
66°
43°
26
67°
44°
27
68°
45°
28
69°
45°
29
70°
46°
30
74°
54°
1
80°
57°
2
81°
56°
3
80°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Morteros
Morteros's September 2026 forecast shows daily high temperatures ranging from 56° to 81°, with overnight lows between 36° and 57°. The average high for September is 71° 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 Morteros. See also: October | November | December.