S
M
T
W
T
F
S
26
85°
66°
27
85°
66°
28
84°
67°
29
84°
67°
30
85°
66°
31
84°
65°
1
79°
64°
2
78°
63°
3
78°
63°
4
79°
65°
5
78°
65°
6
81°
64°
7
82°
64°
8
84°
65°
9
84°
65°
10
83°
64°
11
84°
65°
12
83°
65°
13
84°
66°
14
87°
64°
15
87°
64°
16
81°
64°
17
80°
62°
18
80°
64°
19
84°
58°
20
80°
56°
21
77°
55°
22
76°
56°
23
77°
57°
24
78°
56°
25
77°
57°
26
77°
59°
27
78°
57°
28
80°
56°
29
76°
56°
30
75°
55°
31
75°
55°
1
74°
56°
2
76°
55°
3
76°
55°
4
77°
54°
5
76°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Greenwich
Greenwich's August 2026 forecast shows daily high temperatures ranging from 74° to 87°, with overnight lows between 54° and 67°. The average high for August is 80° with an average low of 61°. 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 Greenwich. See also: September | October | November.
