S
M
T
W
T
F
S
30
90°
67°
31
89°
61°
1
85°
61°
2
84°
62°
3
85°
63°
4
89°
65°
5
89°
66°
6
88°
65°
7
88°
63°
8
86°
59°
9
83°
58°
10
83°
58°
11
82°
57°
12
82°
57°
13
81°
58°
14
80°
57°
15
81°
56°
16
82°
59°
17
81°
60°
18
83°
62°
19
86°
61°
20
80°
62°
21
Hist. Avg.
81°
53°
22
Hist. Avg.
81°
52°
23
Hist. Avg.
80°
52°
24
Hist. Avg.
80°
51°
25
Hist. Avg.
80°
51°
26
Hist. Avg.
79°
50°
27
Hist. Avg.
79°
50°
28
Hist. Avg.
78°
50°
29
Hist. Avg.
78°
49°
30
Hist. Avg.
78°
49°
1
Hist. Avg.
77°
48°
2
Hist. Avg.
77°
48°
3
Hist. Avg.
77°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Deerfield
Deerfield's September 2026 forecast shows daily high temperatures ranging from 80° to 90°, with overnight lows between 56° and 67°. The average high for September is 84° with an average low of 61°. 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 Deerfield. See also: October | November | December.
