S
M
T
W
T
F
S
26
81°
65°
27
84°
69°
28
84°
69°
29
80°
68°
30
85°
65°
31
80°
63°
1
79°
63°
2
79°
64°
3
80°
66°
4
84°
69°
5
86°
69°
6
85°
67°
7
83°
67°
8
85°
68°
9
85°
68°
10
83°
62°
11
80°
61°
12
81°
63°
13
79°
62°
14
81°
62°
15
79°
64°
16
79°
66°
17
78°
65°
18
78°
62°
19
79°
61°
20
78°
61°
21
78°
64°
22
80°
67°
23
80°
66°
24
83°
66°
25
83°
59°
26
82°
59°
27
77°
60°
28
76°
60°
29
76°
63°
30
77°
64°
31
76°
65°
1
81°
60°
2
76°
60°
3
77°
59°
4
76°
58°
5
75°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Peconic
Peconic's August 2026 forecast shows daily high temperatures ranging from 75° to 86°, with overnight lows between 58° and 69°. The average high for August is 80° with an average low of 64°. 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 Peconic. See also: September | October | November.