S
M
T
W
T
F
S
30
82°
67°
31
91°
70°
1
97°
74°
2
95°
71°
3
92°
73°
4
92°
73°
5
84°
72°
6
79°
66°
7
82°
60°
8
85°
60°
9
79°
66°
10
76°
57°
11
82°
53°
12
88°
63°
13
74°
51°
14
72°
47°
15
90°
64°
16
73°
67°
17
84°
67°
18
74°
63°
19
71°
63°
20
68°
60°
21
67°
57°
22
65°
53°
23
64°
56°
24
71°
58°
25
65°
51°
26
70°
47°
27
70°
43°
28
72°
45°
29
79°
46°
30
65°
60°
1
77°
61°
2
66°
46°
3
69°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Olympia Fields
Olympia Fields's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Olympia Fields. See also: October | November | December.
