S
M
T
W
T
F
S
26
88°
70°
27
85°
69°
28
88°
67°
29
83°
67°
30
82°
73°
31
83°
69°
1
87°
68°
2
86°
73°
3
87°
67°
4
87°
67°
5
81°
68°
6
80°
66°
7
81°
65°
8
80°
66°
9
82°
67°
10
82°
69°
11
85°
67°
12
85°
69°
13
84°
69°
14
82°
67°
15
81°
73°
16
86°
71°
17
86°
71°
18
85°
65°
19
82°
65°
20
81°
66°
21
83°
71°
22
82°
70°
23
85°
71°
24
87°
72°
25
86°
71°
26
86°
70°
27
84°
65°
28
83°
65°
29
78°
71°
30
84°
69°
31
79°
65°
1
79°
65°
2
Hist. Avg.
81°
66°
3
Hist. Avg.
80°
66°
4
Hist. Avg.
80°
66°
5
Hist. Avg.
80°
66°
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 78° to 88°, with overnight lows between 65° and 73°. The average high for August is 84° with an average low of 68°. 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.
