S
M
T
W
T
F
S
30
70°
53°
31
72°
57°
1
72°
57°
2
71°
56°
3
72°
53°
4
65°
53°
5
66°
52°
6
65°
52°
7
71°
49°
8
70°
49°
9
70°
50°
10
69°
49°
11
69°
54°
12
68°
53°
13
68°
53°
14
67°
52°
15
67°
53°
16
66°
52°
17
68°
48°
18
67°
51°
19
67°
52°
20
64°
46°
21
67°
43°
22
62°
45°
23
63°
45°
24
62°
44°
25
60°
44°
26
62°
45°
27
62°
48°
28
63°
50°
29
63°
50°
30
62°
49°
1
59°
49°
2
62°
45°
3
59°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Gerdau
Gerdau's September 2026 forecast shows daily high temperatures ranging from 59° to 72°, with overnight lows between 43° and 57°. The average high for September is 66° with an average low of 50°. 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 Gerdau. See also: October | November | December.