S
M
T
W
T
F
S
28
66°
59°
29
66°
57°
30
68°
57°
1
68°
57°
2
72°
54°
3
72°
52°
4
68°
59°
5
68°
59°
6
75°
59°
7
70°
59°
8
82°
59°
9
81°
59°
10
91°
63°
11
82°
57°
12
86°
52°
13
80°
56°
14
85°
59°
15
88°
62°
16
85°
61°
17
77°
58°
18
74°
56°
19
72°
54°
20
70°
54°
21
74°
58°
22
73°
58°
23
74°
59°
24
66°
56°
25
65°
54°
26
66°
53°
27
65°
53°
28
65°
51°
29
66°
56°
30
67°
56°
31
68°
54°
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 88°, with overnight lows between 51° and 62°. The average high for July is 74° 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.
