S
M
T
W
T
F
S
30
84°
55°
31
76°
59°
1
77°
62°
2
76°
57°
3
80°
56°
4
81°
62°
5
84°
58°
6
83°
53°
7
74°
52°
8
74°
51°
9
75°
54°
10
80°
58°
11
78°
52°
12
72°
51°
13
73°
50°
14
74°
58°
15
78°
55°
16
80°
49°
17
72°
48°
18
70°
48°
19
70°
49°
20
71°
52°
21
68°
54°
22
69°
50°
23
69°
53°
24
70°
48°
25
72°
56°
26
75°
55°
27
76°
46°
28
71°
49°
29
68°
53°
30
73°
54°
1
66°
52°
2
69°
50°
3
65°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Plainview
Plainview's September 2026 forecast shows daily high temperatures ranging from 65° to 84°, with overnight lows between 44° and 62°. The average high for September is 74° with an average low of 53°. 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 Plainview. See also: October | November | December.
