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
63°
48°
12
71°
19°
13
84°
15°
14
61°
50°
15
55°
15°
16
65°
40°
17
51°
34°
18
65°
38°
19
70°
46°
20
63°
43°
21
60°
38°
22
66°
41°
23
55°
38°
24
60°
37°
25
65°
38°
26
59°
42°
27
51°
37°
28
62°
45°
29
75°
43°
30
59°
42°
31
60°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Markham
Markham's October 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for October is ° with an average low of °. 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 Markham. See also: November | December | January.
