S
M
T
W
T
F
S
30
87°
66°
31
81°
58°
1
84°
63°
2
88°
64°
3
87°
67°
4
85°
64°
5
86°
62°
6
75°
56°
7
79°
55°
8
75°
56°
9
78°
50°
10
85°
59°
11
82°
57°
12
81°
56°
13
74°
56°
14
76°
54°
15
70°
49°
16
70°
54°
17
79°
53°
18
78°
56°
19
77°
56°
20
80°
54°
21
74°
53°
22
78°
49°
23
67°
46°
24
68°
50°
25
73°
51°
26
75°
53°
27
77°
53°
28
77°
54°
29
76°
52°
30
73°
51°
1
74°
50°
2
69°
49°
3
72°
48°
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 67° to 88°, with overnight lows between 46° and 67°. The average high for September is 77° with an average low of 55°. 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.
