S
M
T
W
T
F
S
26
86°
64°
27
85°
67°
28
87°
68°
29
87°
68°
30
86°
67°
31
85°
67°
1
86°
66°
2
85°
67°
3
85°
67°
4
86°
66°
5
85°
65°
6
84°
65°
7
85°
67°
8
86°
62°
9
79°
60°
10
78°
59°
11
79°
63°
12
79°
65°
13
81°
65°
14
80°
67°
15
82°
66°
16
84°
63°
17
82°
59°
18
79°
58°
19
79°
64°
20
80°
63°
21
82°
64°
22
84°
62°
23
83°
63°
24
83°
59°
25
77°
58°
26
77°
58°
27
76°
59°
28
75°
57°
29
77°
57°
30
77°
60°
31
79°
63°
1
82°
63°
2
82°
62°
3
83°
56°
4
80°
54°
5
75°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Lewisboro
Lewisboro's August 2026 forecast shows daily high temperatures ranging from 75° to 87°, with overnight lows between 54° and 68°. The average high for August is 82° with an average low of 63°. 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 Lewisboro. See also: September | October | November.