S
M
T
W
T
F
S
26
82°
58°
27
82°
57°
28
83°
59°
29
82°
58°
30
84°
59°
31
84°
64°
1
87°
64°
2
88°
63°
3
88°
65°
4
87°
63°
5
88°
57°
6
82°
57°
7
79°
58°
8
80°
57°
9
81°
59°
10
83°
58°
11
85°
63°
12
86°
59°
13
85°
62°
14
86°
63°
15
86°
63°
16
85°
61°
17
87°
59°
18
82°
56°
19
79°
56°
20
80°
57°
21
80°
59°
22
81°
61°
23
79°
59°
24
79°
59°
25
82°
62°
26
84°
60°
27
84°
55°
28
82°
58°
29
80°
59°
30
79°
60°
31
84°
62°
1
85°
60°
2
85°
59°
3
84°
53°
4
83°
51°
5
82°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Chelmsford
Chelmsford's August 2026 forecast shows daily high temperatures ranging from 79° to 88°, with overnight lows between 51° and 65°. The average high for August is 83° 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 August weather will actually feel in Chelmsford. See also: September | October | November.
