S
M
T
W
T
F
S
26
82°
65°
27
81°
64°
28
86°
65°
29
86°
65°
30
83°
66°
31
83°
66°
1
84°
65°
2
83°
66°
3
84°
66°
4
87°
65°
5
83°
63°
6
82°
65°
7
85°
65°
8
85°
59°
9
78°
58°
10
78°
58°
11
79°
62°
12
79°
63°
13
80°
64°
14
82°
65°
15
84°
64°
16
82°
62°
17
80°
56°
18
80°
56°
19
81°
62°
20
85°
63°
21
83°
64°
22
85°
61°
23
84°
63°
24
81°
59°
25
79°
57°
26
78°
56°
27
76°
56°
28
76°
57°
29
78°
56°
30
80°
58°
31
84°
62°
1
83°
62°
2
84°
61°
3
84°
54°
4
78°
52°
5
76°
53°
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 87°, with overnight lows between 52° and 66°. The average high for August is 82° 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 Selinsgrove. See also: September | October | November.