S
M
T
W
T
F
S
26
91°
73°
27
96°
76°
28
84°
65°
29
86°
64°
30
86°
68°
31
70°
63°
1
79°
61°
2
80°
54°
3
81°
58°
4
80°
63°
5
77°
54°
6
78°
56°
7
82°
61°
8
81°
60°
9
80°
58°
10
80°
56°
11
78°
58°
12
77°
57°
13
76°
57°
14
79°
56°
15
74°
56°
16
76°
60°
17
83°
61°
18
82°
60°
19
82°
60°
20
81°
59°
21
81°
60°
22
82°
61°
23
81°
60°
24
81°
59°
25
79°
58°
26
76°
56°
27
73°
55°
28
76°
58°
29
79°
57°
30
80°
58°
31
80°
58°
1
79°
57°
2
78°
57°
3
79°
56°
4
79°
56°
5
78°
55°
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 73° to 83°, with overnight lows between 54° and 63°. The average high for August is 79° 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 Hillsboro. See also: September | October | November.
