S
M
T
W
T
F
S
30
62°
50°
31
61°
52°
1
60°
51°
2
63°
52°
3
63°
48°
4
62°
48°
5
63°
52°
6
62°
52°
7
62°
51°
8
63°
53°
9
62°
52°
10
63°
52°
11
62°
51°
12
62°
51°
13
60°
49°
14
61°
48°
15
59°
50°
16
58°
49°
17
59°
49°
18
61°
50°
19
58°
48°
20
59°
50°
21
62°
50°
22
61°
49°
23
58°
49°
24
57°
50°
25
60°
46°
26
59°
45°
27
57°
44°
28
56°
48°
29
59°
44°
30
57°
47°
1
56°
49°
2
59°
48°
3
57°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Longside
Longside's September 2026 forecast shows daily high temperatures ranging from 56° to 63°, with overnight lows between 44° and 53°. The average high for September is 60° with an average low of 49°. 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 Longside. See also: October | November | December.