S
M
T
W
T
F
S
26
79°
58°
27
84°
54°
28
80°
54°
29
81°
52°
30
83°
54°
31
91°
51°
1
75°
56°
2
75°
49°
3
82°
49°
4
91°
57°
5
91°
54°
6
95°
54°
7
91°
55°
8
91°
51°
9
86°
53°
10
84°
49°
11
85°
52°
12
80°
57°
13
85°
55°
14
83°
57°
15
75°
58°
16
80°
58°
17
85°
53°
18
86°
54°
19
88°
50°
20
93°
55°
21
80°
59°
22
76°
57°
23
79°
62°
24
94°
54°
25
88°
56°
26
82°
55°
27
77°
51°
28
78°
51°
29
74°
51°
30
75°
45°
31
86°
51°
1
72°
57°
2
62°
52°
3
65°
51°
4
67°
49°
5
71°
52°
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 62° to 72°, with overnight lows between 49° and 57°. The average high for August is 67° 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.
