S
M
T
W
T
F
S
27
71°
57°
28
73°
57°
29
73°
58°
30
74°
58°
1
74°
57°
2
73°
57°
3
70°
56°
4
72°
57°
5
72°
56°
6
71°
57°
7
72°
54°
8
71°
53°
9
69°
52°
10
69°
52°
11
67°
53°
12
68°
52°
13
67°
49°
14
62°
50°
15
60°
49°
16
57°
48°
17
60°
47°
18
64°
50°
19
66°
52°
20
68°
50°
21
67°
51°
22
64°
49°
23
66°
46°
24
65°
48°
25
62°
47°
26
66°
45°
27
61°
40°
28
58°
37°
29
49°
35°
30
48°
33°
31
48°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Harrow
Harrow's October 2026 forecast shows daily high temperatures ranging from 48° to 74°, with overnight lows between 33° and 58°. The average high for October is 66° with an average low of 50°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in Harrow. See also: November | December | January.