S
M
T
W
T
F
S
30
87°
61°
31
86°
66°
1
88°
65°
2
90°
62°
3
89°
61°
4
87°
61°
5
88°
68°
6
92°
68°
7
92°
63°
8
89°
60°
9
86°
61°
10
90°
66°
11
92°
60°
12
85°
63°
13
92°
65°
14
93°
64°
15
90°
66°
16
91°
63°
17
87°
64°
18
91°
60°
19
84°
63°
20
90°
64°
21
91°
64°
22
89°
63°
23
89°
63°
24
87°
62°
25
88°
62°
26
87°
64°
27
86°
63°
28
87°
61°
29
87°
60°
30
84°
59°
1
80°
60°
2
83°
57°
3
83°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Santa Teresa
Santa Teresa's September 2026 forecast shows daily high temperatures ranging from 80° to 93°, with overnight lows between 52° and 68°. The average high for September is 88° with an average low of 62°. 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 Santa Teresa. See also: October | November | December.