S
M
T
W
T
F
S
30
69°
54°
31
68°
54°
1
69°
53°
2
69°
54°
3
68°
51°
4
69°
52°
5
68°
54°
6
67°
53°
7
68°
54°
8
68°
54°
9
67°
52°
10
66°
51°
11
66°
53°
12
65°
52°
13
66°
51°
14
63°
52°
15
64°
52°
16
64°
51°
17
65°
48°
18
61°
52°
19
62°
51°
20
63°
51°
21
64°
52°
22
64°
50°
23
61°
47°
24
61°
47°
25
59°
47°
26
Hist. Avg.
59°
49°
27
Hist. Avg.
59°
49°
28
Hist. Avg.
59°
49°
29
Hist. Avg.
59°
49°
30
Hist. Avg.
59°
48°
1
Hist. Avg.
58°
48°
2
Hist. Avg.
58°
48°
3
Hist. Avg.
58°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Irby
Irby's September 2026 forecast shows daily high temperatures ranging from 59° to 69°, with overnight lows between 47° and 54°. The average high for September is 65° with an average low of 52°. 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 Irby. See also: October | November | December.