S
M
T
W
T
F
S
26
85°
54°
27
85°
55°
28
83°
54°
29
85°
53°
30
78°
50°
31
80°
52°
1
82°
52°
2
86°
56°
3
88°
57°
4
87°
56°
5
86°
56°
6
88°
57°
7
88°
57°
8
87°
56°
9
86°
53°
10
86°
51°
11
82°
52°
12
78°
52°
13
79°
51°
14
85°
52°
15
84°
56°
16
77°
53°
17
78°
54°
18
84°
53°
19
84°
53°
20
85°
54°
21
84°
50°
22
83°
50°
23
80°
50°
24
84°
53°
25
84°
55°
26
76°
54°
27
77°
50°
28
81°
48°
29
85°
51°
30
82°
48°
31
77°
47°
1
75°
44°
2
76°
48°
3
77°
48°
4
83°
46°
5
81°
53°
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 75° to 88°, with overnight lows between 44° and 57°. The average high for August is 82° with an average low of 52°. 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.
