S
M
T
W
T
F
S
27
76°
54°
28
N/A
29
71°
61°
30
74°
56°
1
74°
63°
2
67°
47°
3
62°
46°
4
71°
46°
5
61°
42°
6
58°
38°
7
73°
15°
8
66°
15°
9
69°
44°
10
60°
39°
11
62°
53°
12
70°
61°
13
75°
54°
14
62°
46°
15
58°
45°
16
58°
39°
17
48°
36°
18
52°
43°
19
59°
49°
20
61°
49°
21
60°
48°
22
55°
46°
23
58°
47°
24
56°
39°
25
56°
45°
26
57°
39°
27
54°
35°
28
45°
34°
29
45°
39°
30
49°
43°
31
53°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Thornhill
Thornhill's October 2026 forecast shows daily high temperatures ranging from 45° to 75°, with overnight lows between 34° and 61°. The average high for October is 57° with an average low of 44°. 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 Thornhill. See also: November | December | January.
