S
M
T
W
T
F
S
26
83°
61°
27
86°
60°
28
75°
65°
29
78°
62°
30
80°
64°
31
86°
61°
1
86°
60°
2
78°
69°
3
83°
62°
4
84°
56°
5
84°
63°
6
88°
71°
7
88°
69°
8
82°
67°
9
90°
64°
10
81°
62°
11
82°
67°
12
83°
64°
13
84°
67°
14
84°
63°
15
84°
60°
16
74°
62°
17
90°
69°
18
83°
61°
19
83°
56°
20
71°
57°
21
77°
52°
22
79°
55°
23
79°
54°
24
72°
55°
25
77°
52°
26
80°
63°
27
78°
61°
28
81°
58°
29
79°
57°
30
80°
61°
31
79°
60°
1
78°
62°
2
75°
59°
3
75°
58°
4
78°
57°
5
77°
56°
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 72° to 81°, with overnight lows between 52° and 63°. The average high for August is 78° with an average low of 58°. 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.