S
M
T
W
T
F
S
26
92°
58°
27
91°
59°
28
86°
59°
29
91°
58°
30
90°
60°
31
86°
57°
1
89°
58°
2
89°
56°
3
90°
58°
4
90°
58°
5
92°
59°
6
93°
60°
7
93°
59°
8
92°
58°
9
85°
59°
10
84°
58°
11
88°
55°
12
88°
58°
13
87°
58°
14
83°
53°
15
84°
56°
16
89°
54°
17
84°
54°
18
87°
58°
19
86°
58°
20
81°
57°
21
82°
55°
22
83°
53°
23
82°
53°
24
82°
53°
25
86°
53°
26
89°
48°
27
82°
47°
28
80°
46°
29
81°
47°
30
81°
49°
31
82°
47°
1
83°
44°
2
80°
43°
3
77°
44°
4
80°
45°
5
80°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Johnstown-Milliken
Johnstown-Milliken's August 2026 forecast shows daily high temperatures ranging from 77° to 93°, with overnight lows between 43° and 60°. The average high for August is 86° with an average low of 54°. 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 Johnstown-Milliken. See also: September | October | November.