S
M
T
W
T
F
S
26
88°
62°
27
87°
62°
28
88°
61°
29
88°
62°
30
87°
62°
31
86°
61°
1
83°
61°
2
87°
62°
3
86°
60°
4
82°
59°
5
81°
60°
6
81°
61°
7
83°
61°
8
86°
60°
9
87°
61°
10
86°
60°
11
84°
61°
12
85°
60°
13
85°
59°
14
84°
60°
15
86°
60°
16
87°
59°
17
84°
55°
18
80°
52°
19
79°
53°
20
81°
56°
21
85°
56°
22
86°
57°
23
87°
56°
24
87°
57°
25
86°
57°
26
85°
53°
27
80°
55°
28
79°
52°
29
78°
53°
30
78°
54°
31
80°
54°
1
80°
53°
2
79°
51°
3
78°
53°
4
78°
50°
5
79°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Seneca
Seneca's August 2026 forecast shows daily high temperatures ranging from 78° to 88°, with overnight lows between 49° and 62°. The average high for August is 83° with an average low of 57°. 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 Seneca. See also: September | October | November.