S
M
T
W
T
F
S
26
85°
66°
27
87°
67°
28
80°
66°
29
81°
64°
30
87°
62°
31
89°
66°
1
81°
65°
2
74°
65°
3
79°
60°
4
81°
57°
5
84°
57°
6
85°
69°
7
84°
71°
8
89°
70°
9
83°
61°
10
84°
67°
11
81°
66°
12
78°
65°
13
81°
63°
14
82°
68°
15
79°
67°
16
86°
69°
17
81°
60°
18
83°
57°
19
83°
64°
20
81°
61°
21
82°
57°
22
76°
62°
23
76°
57°
24
78°
55°
25
80°
55°
26
81°
57°
27
83°
61°
28
76°
59°
29
79°
66°
30
82°
69°
31
85°
71°
1
87°
72°
2
88°
69°
3
84°
65°
4
82°
63°
5
76°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Harrow
Harrow's August 2026 forecast shows daily high temperatures ranging from 76° to 88°, with overnight lows between 59° and 72°. The average high for August is 82° with an average low of 66°. 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. See also: September | October | November.
