S
M
T
W
T
F
S
30
80°
50°
31
81°
47°
1
82°
45°
2
79°
44°
3
77°
45°
4
79°
46°
5
79°
49°
6
83°
51°
7
85°
46°
8
79°
44°
9
78°
43°
10
77°
45°
11
78°
51°
12
83°
42°
13
79°
45°
14
77°
50°
15
85°
50°
16
84°
46°
17
85°
41°
18
74°
43°
19
76°
41°
20
81°
45°
21
81°
47°
22
82°
47°
23
80°
46°
24
80°
47°
25
72°
45°
26
75°
45°
27
78°
44°
28
78°
45°
29
77°
45°
30
79°
46°
1
79°
38°
2
68°
35°
3
68°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in The Highlands
The Highlands's September 2026 forecast shows daily high temperatures ranging from 68° to 85°, with overnight lows between 34° and 51°. The average high for September is 79° with an average low of 45°. 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 The Highlands. See also: October | November | December.