S
M
T
W
T
F
S
30
76°
53°
31
75°
51°
1
76°
54°
2
77°
58°
3
76°
61°
4
83°
61°
5
85°
60°
6
84°
52°
7
82°
51°
8
75°
52°
9
75°
51°
10
74°
54°
11
74°
56°
12
73°
52°
13
76°
54°
14
78°
56°
15
78°
54°
16
72°
55°
17
73°
54°
18
76°
53°
19
77°
47°
20
75°
50°
21
74°
47°
22
76°
45°
23
69°
45°
24
69°
46°
25
68°
47°
26
68°
44°
27
69°
44°
28
67°
45°
29
65°
42°
30
66°
42°
1
65°
47°
2
72°
42°
3
70°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in North Chelmsford
North Chelmsford's September 2026 forecast shows daily high temperatures ranging from 65° to 85°, with overnight lows between 42° and 61°. The average high for September is 74° with an average low of 51°. 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 North Chelmsford. See also: October | November | December.
