S
M
T
W
T
F
S
26
80°
53°
27
84°
54°
28
80°
59°
29
73°
60°
30
79°
60°
31
79°
60°
1
83°
59°
2
80°
63°
3
79°
57°
4
80°
56°
5
85°
56°
6
88°
60°
7
87°
66°
8
82°
63°
9
80°
62°
10
80°
60°
11
77°
57°
12
76°
55°
13
75°
58°
14
74°
52°
15
70°
49°
16
76°
47°
17
78°
65°
18
78°
62°
19
77°
58°
20
74°
52°
21
76°
50°
22
76°
49°
23
71°
61°
24
73°
54°
25
73°
55°
26
78°
52°
27
78°
53°
28
78°
53°
29
72°
46°
30
73°
55°
31
76°
50°
1
74°
52°
2
69°
61°
3
79°
60°
4
75°
56°
5
70°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Chelsea
Chelsea's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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 Chelsea. See also: September | October | November.