S
M
T
W
T
F
S
30
78°
60°
31
80°
62°
1
83°
63°
2
84°
60°
3
83°
56°
4
83°
61°
5
82°
58°
6
80°
55°
7
75°
59°
8
73°
60°
9
75°
53°
10
78°
51°
11
74°
59°
12
76°
53°
13
80°
57°
14
77°
55°
15
72°
58°
16
72°
50°
17
72°
51°
18
Hist. Avg.
75°
53°
19
Hist. Avg.
75°
53°
20
Hist. Avg.
74°
52°
21
Hist. Avg.
74°
52°
22
Hist. Avg.
73°
51°
23
Hist. Avg.
73°
51°
24
Hist. Avg.
72°
51°
25
Hist. Avg.
72°
50°
26
Hist. Avg.
72°
50°
27
Hist. Avg.
71°
49°
28
Hist. Avg.
71°
49°
29
Hist. Avg.
70°
49°
30
Hist. Avg.
70°
48°
1
Hist. Avg.
70°
48°
2
Hist. Avg.
69°
47°
3
Hist. Avg.
69°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Granby
Granby's September 2026 forecast shows daily high temperatures ranging from 72° to 84°, with overnight lows between 50° and 63°. The average high for September is 78° with an average low of 57°. 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 Granby. See also: October | November | December.
