S
M
T
W
T
F
S
30
86°
64°
31
87°
63°
1
86°
63°
2
85°
64°
3
90°
65°
4
90°
67°
5
89°
68°
6
90°
66°
7
85°
66°
8
88°
64°
9
89°
65°
10
87°
64°
11
86°
63°
12
86°
64°
13
87°
63°
14
86°
63°
15
86°
62°
16
85°
63°
17
86°
62°
18
85°
61°
19
84°
61°
20
82°
60°
21
82°
60°
22
83°
61°
23
84°
60°
24
83°
59°
25
82°
59°
26
83°
57°
27
84°
58°
28
83°
59°
29
82°
58°
30
81°
56°
1
80°
57°
2
82°
58°
3
77°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Weir
Weir's September 2026 forecast shows daily high temperatures ranging from 77° to 90°, with overnight lows between 53° and 68°. The average high for September is 85° with an average low of 62°. 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 Weir. See also: October | November | December.
