S
M
T
W
T
F
S
27
71°
48°
28
70°
52°
29
62°
45°
30
59°
49°
1
59°
53°
2
68°
42°
3
70°
40°
4
66°
38°
5
53°
40°
6
56°
44°
7
64°
49°
8
64°
50°
9
60°
51°
10
64°
51°
11
66°
47°
12
66°
41°
13
62°
39°
14
51°
41°
15
50°
40°
16
51°
37°
17
53°
42°
18
55°
40°
19
58°
45°
20
60°
44°
21
60°
44°
22
61°
48°
23
59°
43°
24
60°
37°
25
55°
37°
26
51°
36°
27
52°
37°
28
47°
34°
29
48°
38°
30
Hist. Avg.
51°
39°
31
Hist. Avg.
50°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
October Weather in Thornhill
Thornhill's October 2026 forecast shows daily high temperatures ranging from 47° to 71°, with overnight lows between 34° and 53°. The average high for October is 59° with an average low of 43°. 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.
