S
M
T
W
T
F
S
30
90°
66°
31
90°
64°
1
91°
64°
2
87°
66°
3
86°
67°
4
87°
68°
5
87°
66°
6
90°
64°
7
83°
67°
8
89°
66°
9
89°
64°
10
88°
67°
11
86°
64°
12
89°
58°
13
81°
57°
14
79°
56°
15
78°
57°
16
79°
58°
17
84°
63°
18
85°
63°
19
84°
62°
20
79°
63°
21
84°
64°
22
86°
61°
23
85°
54°
24
80°
53°
25
73°
52°
26
74°
52°
27
Hist. Avg.
78°
56°
28
Hist. Avg.
78°
56°
29
Hist. Avg.
77°
55°
30
Hist. Avg.
77°
55°
1
Hist. Avg.
76°
54°
2
Hist. Avg.
76°
54°
3
Hist. Avg.
76°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Weir
Weir's September 2026 forecast shows daily high temperatures ranging from 73° to 91°, with overnight lows between 52° and 68°. The average high for September is 84° 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.
