S
M
T
W
T
F
S
28
71°
54°
29
72°
53°
30
84°
57°
1
85°
58°
2
83°
58°
3
77°
56°
4
76°
58°
5
71°
52°
6
81°
58°
7
75°
57°
8
73°
58°
9
73°
54°
10
74°
52°
11
76°
55°
12
82°
59°
13
76°
54°
14
77°
56°
15
75°
51°
16
75°
54°
17
76°
56°
18
82°
58°
19
79°
57°
20
82°
55°
21
83°
56°
22
81°
59°
23
80°
58°
24
80°
57°
25
82°
59°
26
83°
60°
27
78°
59°
28
76°
56°
29
75°
55°
30
75°
54°
31
76°
56°
1
82°
58°
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 71° to 85°, with overnight lows between 51° and 60°. The average high for July is 78° 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.
