S
M
T
W
T
F
S
30
90°
74°
31
91°
75°
1
90°
75°
2
91°
73°
3
92°
73°
4
91°
69°
5
89°
73°
6
96°
69°
7
95°
70°
8
96°
72°
9
95°
71°
10
96°
69°
11
88°
69°
12
92°
70°
13
88°
70°
14
89°
73°
15
95°
71°
16
92°
71°
17
91°
70°
18
90°
71°
19
90°
70°
20
89°
70°
21
91°
69°
22
93°
71°
23
93°
69°
24
92°
69°
25
91°
67°
26
84°
65°
27
82°
61°
28
81°
59°
29
80°
60°
30
83°
66°
1
86°
65°
2
90°
58°
3
82°
62°
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 80° to 96°, with overnight lows between 58° and 75°. The average high for September is 90° with an average low of 69°. 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.
