S
M
T
W
T
F
S
30
84°
63°
31
87°
56°
1
82°
55°
2
75°
62°
3
77°
64°
4
86°
56°
5
86°
52°
6
76°
54°
7
75°
59°
8
79°
59°
9
79°
54°
10
74°
58°
11
74°
55°
12
75°
51°
13
73°
50°
14
72°
52°
15
73°
57°
16
74°
59°
17
81°
60°
18
82°
58°
19
82°
54°
20
74°
55°
21
81°
56°
22
72°
48°
23
77°
48°
24
68°
47°
25
70°
47°
26
69°
46°
27
68°
44°
28
Hist. Avg.
70°
47°
29
Hist. Avg.
69°
46°
30
Hist. Avg.
69°
46°
1
Hist. Avg.
68°
46°
2
Hist. Avg.
68°
45°
3
Hist. Avg.
68°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Blair
Blair's September 2026 forecast shows daily high temperatures ranging from 68° to 87°, with overnight lows between 44° and 64°. The average high for September is 77° with an average low of 54°. 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 Blair. See also: October | November | December.