S
M
T
W
T
F
S
30
97°
77°
31
100°
77°
1
100°
79°
2
102°
77°
3
104°
81°
4
99°
81°
5
95°
70°
6
90°
73°
7
97°
75°
8
85°
65°
9
87°
67°
10
87°
68°
11
86°
70°
12
87°
68°
13
88°
68°
14
85°
67°
15
89°
67°
16
87°
65°
17
86°
66°
18
81°
63°
19
80°
64°
20
82°
63°
21
82°
60°
22
81°
61°
23
80°
62°
24
77°
62°
25
77°
61°
26
78°
62°
27
77°
61°
28
78°
61°
29
80°
62°
30
79°
56°
1
76°
55°
2
74°
53°
3
75°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in El Mosquito
El Mosquito's September 2026 forecast shows daily high temperatures ranging from 74° to 89°, with overnight lows between 53° and 70°. The average high for September is 82° with an average low of 63°. 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 El Mosquito. See also: October | November | December.