S
M
T
W
T
F
S
26
86°
67°
27
85°
67°
28
84°
66°
29
83°
65°
30
80°
65°
31
82°
66°
1
81°
66°
2
86°
67°
3
87°
66°
4
85°
65°
5
84°
65°
6
84°
66°
7
87°
61°
8
85°
55°
9
77°
54°
10
76°
55°
11
78°
54°
12
76°
55°
13
77°
55°
14
78°
60°
15
77°
58°
16
77°
56°
17
81°
60°
18
83°
59°
19
84°
63°
20
84°
62°
21
85°
62°
22
84°
56°
23
78°
56°
24
83°
57°
25
74°
60°
26
75°
53°
27
75°
53°
28
74°
52°
29
72°
52°
30
73°
51°
31
72°
52°
1
73°
50°
2
72°
50°
3
75°
57°
4
76°
54°
5
72°
56°
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 72° to 87°, with overnight lows between 50° and 67°. The average high for August is 80° with an average low of 59°. 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.
