S
M
T
W
T
F
S
30
77°
61°
31
78°
59°
1
80°
58°
2
82°
56°
3
73°
59°
4
78°
58°
5
74°
55°
6
71°
53°
7
73°
52°
8
72°
53°
9
76°
55°
10
73°
52°
11
71°
56°
12
70°
56°
13
73°
55°
14
75°
55°
15
78°
58°
16
78°
59°
17
76°
58°
18
78°
58°
19
77°
57°
20
77°
58°
21
75°
58°
22
71°
57°
23
70°
56°
24
69°
56°
25
69°
55°
26
75°
56°
27
76°
45°
28
64°
44°
29
63°
44°
30
64°
53°
1
73°
49°
2
66°
42°
3
66°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Ski Roundtop
Ski Roundtop's September 2026 forecast shows daily high temperatures ranging from 63° to 82°, with overnight lows between 39° and 61°. The average high for September is 73° with an average low of 54°. 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 Ski Roundtop. See also: October | November | December.