S
M
T
W
T
F
S
30
79°
69°
31
81°
70°
1
84°
65°
2
80°
64°
3
79°
65°
4
78°
63°
5
78°
63°
6
80°
66°
7
81°
64°
8
81°
68°
9
82°
68°
10
81°
66°
11
81°
67°
12
82°
66°
13
82°
67°
14
81°
67°
15
82°
66°
16
82°
65°
17
80°
66°
18
77°
66°
19
79°
65°
20
80°
64°
21
79°
63°
22
79°
57°
23
75°
62°
24
74°
63°
25
Hist. Avg.
75°
55°
26
Hist. Avg.
75°
54°
27
Hist. Avg.
75°
54°
28
Hist. Avg.
74°
54°
29
Hist. Avg.
74°
53°
30
Hist. Avg.
74°
53°
1
Hist. Avg.
73°
52°
2
Hist. Avg.
73°
52°
3
Hist. Avg.
72°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Northfield
Northfield's September 2026 forecast shows daily high temperatures ranging from 74° to 84°, with overnight lows between 57° and 70°. The average high for September is 80° with an average low of 65°. 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.
