S
M
T
W
T
F
S
26
80°
64°
27
83°
65°
28
86°
65°
29
86°
64°
30
85°
66°
31
86°
65°
1
83°
65°
2
86°
66°
3
87°
66°
4
86°
65°
5
85°
65°
6
86°
64°
7
87°
65°
8
85°
60°
9
79°
58°
10
79°
58°
11
82°
65°
12
83°
65°
13
86°
66°
14
86°
65°
15
85°
64°
16
82°
62°
17
81°
56°
18
81°
56°
19
82°
61°
20
85°
62°
21
86°
63°
22
85°
62°
23
86°
63°
24
81°
60°
25
79°
61°
26
79°
58°
27
80°
59°
28
78°
61°
29
79°
59°
30
79°
57°
31
85°
61°
1
85°
62°
2
83°
61°
3
85°
54°
4
78°
52°
5
77°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Hillsboro
Hillsboro's August 2026 forecast shows daily high temperatures ranging from 77° to 87°, with overnight lows between 52° and 66°. The average high for August is 83° with an average low of 62°. 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 Hillsboro. See also: September | October | November.
