S
M
T
W
T
F
S
30
78°
59°
31
81°
62°
1
84°
58°
2
82°
57°
3
77°
56°
4
78°
57°
5
79°
64°
6
83°
63°
7
85°
62°
8
78°
62°
9
76°
63°
10
81°
61°
11
81°
59°
12
80°
61°
13
77°
58°
14
75°
54°
15
74°
54°
16
73°
53°
17
73°
53°
18
74°
57°
19
77°
59°
20
78°
60°
21
79°
55°
22
74°
51°
23
72°
56°
24
71°
57°
25
77°
50°
26
69°
55°
27
75°
56°
28
76°
55°
29
Hist. Avg.
72°
52°
30
Hist. Avg.
72°
51°
1
Hist. Avg.
71°
51°
2
Hist. Avg.
71°
50°
3
Hist. Avg.
70°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Highland
Highland's September 2026 forecast shows daily high temperatures ranging from 69° to 85°, with overnight lows between 50° and 64°. The average high for September is 77° with an average low of 58°. 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 Highland. See also: October | November | December.