S
M
T
W
T
F
S
26
79°
63°
27
79°
55°
28
86°
61°
29
93°
61°
30
81°
61°
31
N/A
1
81°
57°
2
84°
62°
3
88°
64°
4
85°
65°
5
83°
62°
6
78°
62°
7
75°
60°
8
74°
58°
9
76°
59°
10
79°
62°
11
80°
61°
12
79°
59°
13
74°
55°
14
75°
57°
15
76°
57°
16
76°
56°
17
75°
57°
18
74°
56°
19
74°
56°
20
73°
54°
21
73°
54°
22
72°
51°
23
71°
55°
24
71°
54°
25
72°
54°
26
72°
55°
27
73°
54°
28
72°
53°
29
70°
54°
30
69°
53°
31
69°
49°
1
66°
48°
2
66°
50°
3
67°
50°
4
66°
47°
5
65°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Harrow on the Hill
Harrow on the Hill's August 2026 forecast shows daily high temperatures ranging from 65° to 88°, with overnight lows between 47° and 65°. The average high for August is 74° with an average low of 56°. 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 Harrow on the Hill. See also: September | October | November.
