S
M
T
W
T
F
S
30
95°
56°
31
92°
59°
1
91°
48°
2
89°
41°
3
85°
47°
4
85°
48°
5
92°
39°
6
91°
67°
7
94°
68°
8
94°
69°
9
94°
64°
10
95°
62°
11
91°
60°
12
87°
58°
13
85°
57°
14
84°
59°
15
86°
59°
16
84°
58°
17
86°
59°
18
85°
57°
19
88°
52°
20
85°
54°
21
82°
54°
22
82°
52°
23
83°
52°
24
81°
51°
25
82°
53°
26
82°
53°
27
81°
52°
28
83°
53°
29
85°
54°
30
87°
55°
1
87°
54°
2
86°
54°
3
87°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Tecate
Tecate's September 2026 forecast shows daily high temperatures ranging from 81° to 95°, with overnight lows between 51° and 69°. The average high for September is 86° with an average low of 57°. 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 Tecate. See also: October | November | December.
