S
M
T
W
T
F
S
30
82°
60°
31
83°
61°
1
85°
60°
2
86°
62°
3
89°
62°
4
87°
64°
5
78°
64°
6
78°
64°
7
71°
60°
8
80°
55°
9
80°
56°
10
79°
59°
11
82°
63°
12
79°
66°
13
79°
62°
14
79°
58°
15
78°
56°
16
85°
59°
17
85°
58°
18
82°
63°
19
83°
61°
20
80°
60°
21
83°
60°
22
77°
58°
23
60°
52°
24
63°
43°
25
71°
42°
26
71°
45°
27
69°
42°
28
71°
48°
29
74°
47°
30
76°
54°
1
73°
56°
2
71°
51°
3
69°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Sugar Grove
Sugar Grove's September 2026 forecast shows daily high temperatures ranging from 63° to 76°, with overnight lows between 42° and 56°. The average high for September is 71° with an average low of 48°. 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 Sugar Grove. See also: October | November | December.