S
M
T
W
T
F
S
30
89°
66°
31
83°
63°
1
83°
57°
2
87°
63°
3
93°
71°
4
85°
68°
5
86°
66°
6
78°
68°
7
83°
67°
8
86°
58°
9
79°
55°
10
84°
51°
11
89°
64°
12
72°
49°
13
70°
47°
14
65°
50°
15
71°
49°
16
75°
45°
17
73°
58°
18
63°
60°
19
61°
60°
20
67°
56°
21
58°
51°
22
68°
47°
23
73°
51°
24
63°
59°
25
67°
62°
26
61°
61°
27
72°
61°
28
75°
63°
29
69°
63°
30
83°
63°
1
68°
41°
2
62°
35°
3
67°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Granite Falls
Granite Falls's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Granite Falls. See also: October | November | December.
