S
M
T
W
T
F
S
26
66°
39°
27
70°
43°
28
63°
46°
29
63°
46°
30
70°
48°
1
77°
43°
2
72°
46°
3
66°
54°
4
59°
52°
5
63°
50°
6
57°
45°
7
63°
45°
8
66°
41°
9
70°
43°
10
55°
36°
11
55°
34°
12
59°
32°
13
55°
43°
14
55°
43°
15
57°
41°
16
59°
49°
17
61°
44°
18
61°
51°
19
64°
53°
20
69°
53°
21
74°
53°
22
78°
57°
23
78°
56°
24
77°
58°
25
76°
56°
26
71°
53°
27
70°
53°
28
71°
54°
29
60°
43°
30
63°
46°
31
61°
47°
1
61°
44°
2
62°
44°
3
65°
49°
4
65°
51°
5
67°
52°
6
69°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Harrow
Harrow's May 2026 forecast shows daily high temperatures ranging from 59° to 78°, with overnight lows between 43° and 58°. The average high for May is 67° with an average low of 51°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Harrow. See also: June | July | August.
