S
M
T
W
T
F
S
27
71°
49°
28
72°
46°
29
75°
49°
30
64°
55°
1
64°
54°
2
59°
38°
3
59°
37°
4
61°
40°
5
50°
31°
6
56°
28°
7
69°
46°
8
58°
38°
9
55°
34°
10
63°
33°
11
69°
49°
12
57°
42°
13
47°
41°
14
50°
33°
15
49°
38°
16
42°
21°
17
45°
32°
18
57°
41°
19
58°
39°
20
59°
40°
21
58°
41°
22
52°
40°
23
50°
37°
24
53°
41°
25
52°
38°
26
49°
35°
27
48°
30°
28
40°
32°
29
43°
38°
30
48°
38°
31
51°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Chelmsford
Chelmsford's October 2026 forecast shows daily high temperatures ranging from 40° to 59°, with overnight lows between 21° and 41°. The average high for October is 50° with an average low of 36°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in Chelmsford. See also: November | December | January.
