S
M
T
W
T
F
S
26
87°
66°
27
87°
67°
28
86°
66°
29
86°
65°
30
84°
60°
31
79°
59°
1
78°
58°
2
79°
59°
3
80°
63°
4
80°
61°
5
81°
60°
6
83°
65°
7
84°
65°
8
81°
63°
9
81°
62°
10
80°
58°
11
82°
58°
12
83°
60°
13
84°
64°
14
87°
65°
15
86°
62°
16
83°
66°
17
88°
65°
18
86°
59°
19
81°
56°
20
78°
56°
21
78°
57°
22
79°
56°
23
79°
56°
24
80°
57°
25
82°
56°
26
83°
56°
27
84°
56°
28
82°
56°
29
78°
57°
30
77°
55°
31
81°
59°
1
84°
53°
2
77°
54°
3
76°
53°
4
77°
57°
5
80°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Selinsgrove
Selinsgrove's August 2026 forecast shows daily high temperatures ranging from 76° to 88°, with overnight lows between 53° and 67°. The average high for August is 82° with an average low of 60°. 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 Selinsgrove. See also: September | October | November.