S
M
T
W
T
F
S
30
102°
78°
31
101°
74°
1
100°
76°
2
101°
73°
3
93°
73°
4
100°
76°
5
100°
71°
6
100°
72°
7
102°
73°
8
103°
77°
9
99°
76°
10
98°
75°
11
95°
77°
12
100°
76°
13
98°
76°
14
99°
74°
15
96°
70°
16
92°
68°
17
91°
68°
18
91°
63°
19
83°
64°
20
86°
64°
21
87°
63°
22
86°
63°
23
90°
68°
24
88°
68°
25
89°
67°
26
89°
66°
27
87°
67°
28
88°
67°
29
88°
66°
30
87°
66°
1
87°
65°
2
86°
65°
3
87°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Alvarado
Alvarado's September 2026 forecast shows daily high temperatures ranging from 83° to 100°, with overnight lows between 63° and 77°. The average high for September is 91° with an average low of 68°. 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 Alvarado. See also: October | November | December.