S
M
T
W
T
F
S
26
79°
62°
27
81°
62°
28
80°
60°
29
80°
61°
30
83°
62°
31
81°
56°
1
81°
63°
2
84°
64°
3
81°
57°
4
83°
56°
5
78°
57°
6
78°
57°
7
83°
56°
8
79°
57°
9
81°
62°
10
84°
62°
11
82°
60°
12
84°
62°
13
84°
63°
14
83°
64°
15
80°
63°
16
84°
55°
17
82°
55°
18
77°
56°
19
77°
56°
20
75°
58°
21
76°
54°
22
76°
60°
23
78°
61°
24
82°
62°
25
84°
61°
26
84°
52°
27
80°
53°
28
74°
52°
29
74°
53°
30
75°
58°
31
76°
61°
1
81°
61°
2
81°
58°
3
80°
54°
4
80°
59°
5
79°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Hillsborough
Hillsborough's August 2026 forecast shows daily high temperatures ranging from 74° to 84°, with overnight lows between 52° and 64°. 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 Hillsborough. See also: September | October | November.