S
M
T
W
T
F
S
30
61°
45°
31
70°
43°
1
73°
41°
2
72°
46°
3
64°
46°
4
55°
39°
5
48°
45°
6
55°
41°
7
55°
48°
8
66°
41°
9
72°
46°
10
57°
37°
11
52°
37°
12
50°
34°
13
57°
30°
14
57°
45°
15
46°
37°
16
64°
32°
17
70°
36°
18
70°
36°
19
72°
34°
20
75°
46°
21
80°
47°
22
72°
49°
23
70°
41°
24
60°
46°
25
64°
40°
26
56°
36°
27
61°
41°
28
59°
42°
29
60°
44°
30
61°
42°
1
60°
42°
2
59°
35°
3
61°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Longview
Longview's September 2026 forecast shows daily high temperatures ranging from 56° to 80°, with overnight lows between 35° and 49°. The average high for September is 64° with an average low of 42°. 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 Longview. See also: October | November | December.
