S
M
T
W
T
F
S
30
83°
70°
31
89°
70°
1
96°
73°
2
96°
77°
3
91°
76°
4
94°
72°
5
82°
69°
6
80°
66°
7
82°
67°
8
87°
69°
9
89°
65°
10
80°
63°
11
81°
65°
12
84°
64°
13
81°
63°
14
80°
62°
15
81°
62°
16
75°
55°
17
78°
60°
18
71°
59°
19
75°
60°
20
76°
59°
21
75°
59°
22
74°
57°
23
71°
57°
24
73°
55°
25
76°
57°
26
76°
52°
27
65°
47°
28
63°
45°
29
64°
48°
30
64°
45°
1
63°
47°
2
66°
53°
3
65°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Northfield
Northfield's September 2026 forecast shows daily high temperatures ranging from 63° to 94°, with overnight lows between 45° and 76°. The average high for September is 76° with an average low of 59°. 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 Northfield. See also: October | November | December.
