S
M
T
W
T
F
S
30
83°
69°
31
86°
69°
1
95°
72°
2
96°
74°
3
88°
74°
4
93°
74°
5
81°
70°
6
77°
63°
7
78°
59°
8
85°
61°
9
79°
71°
10
77°
59°
11
80°
56°
12
87°
61°
13
72°
53°
14
71°
50°
15
83°
66°
16
74°
64°
17
76°
65°
18
72°
62°
19
71°
63°
20
68°
62°
21
65°
59°
22
63°
57°
23
N/A
24
66°
58°
25
68°
51°
26
68°
52°
27
70°
54°
28
73°
56°
29
74°
58°
30
68°
57°
1
65°
55°
2
66°
54°
3
73°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Buffalo Grove
Buffalo Grove's September 2026 forecast shows daily high temperatures ranging from 65° to 74°, with overnight lows between 51° and 58°. The average high for September is 69° 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 Buffalo Grove. See also: October | November | December.
