S
M
T
W
T
F
S
30
81°
68°
31
87°
70°
1
96°
71°
2
95°
73°
3
92°
70°
4
90°
71°
5
87°
69°
6
86°
63°
7
81°
61°
8
80°
60°
9
81°
58°
10
81°
60°
11
77°
53°
12
80°
52°
13
80°
55°
14
79°
52°
15
82°
57°
16
82°
58°
17
81°
57°
18
80°
57°
19
81°
56°
20
82°
57°
21
82°
57°
22
81°
56°
23
81°
56°
24
80°
55°
25
81°
56°
26
81°
55°
27
80°
54°
28
79°
54°
29
78°
53°
30
77°
53°
1
77°
52°
2
76°
52°
3
77°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Streamwood
Streamwood's September 2026 forecast shows daily high temperatures ranging from 76° to 96°, with overnight lows between 51° and 73°. The average high for September is 82° with an average low of 58°. 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 Streamwood. See also: October | November | December.
