S
M
T
W
T
F
S
28
66°
59°
29
66°
57°
30
68°
57°
1
66°
56°
2
68°
48°
3
71°
52°
4
68°
54°
5
72°
54°
6
72°
56°
7
77°
57°
8
77°
58°
9
76°
57°
10
74°
57°
11
74°
56°
12
73°
55°
13
74°
56°
14
65°
55°
15
72°
57°
16
70°
56°
17
70°
56°
18
69°
55°
19
70°
56°
20
65°
55°
21
65°
55°
22
69°
56°
23
70°
57°
24
71°
57°
25
72°
56°
26
72°
57°
27
71°
56°
28
69°
56°
29
65°
52°
30
66°
56°
31
65°
57°
1
69°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Markham
Markham's July 2026 forecast shows daily high temperatures ranging from 65° to 77°, with overnight lows between 48° and 58°. The average high for July is 70° with an average low of 56°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Markham. See also: August | September | October.
