S
M
T
W
T
F
S
28
82°
59°
29
83°
61°
30
94°
70°
1
97°
75°
2
94°
74°
3
95°
74°
4
81°
72°
5
80°
67°
6
80°
64°
7
82°
65°
8
85°
67°
9
84°
68°
10
83°
64°
11
80°
63°
12
84°
66°
13
86°
68°
14
90°
71°
15
89°
69°
16
86°
65°
17
80°
66°
18
80°
64°
19
81°
65°
20
82°
59°
21
74°
56°
22
75°
57°
23
75°
59°
24
76°
62°
25
78°
63°
26
76°
63°
27
76°
62°
28
78°
64°
29
81°
64°
30
79°
63°
31
79°
65°
1
82°
65°
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 74° to 90°, with overnight lows between 56° and 71°. The average high for July is 81° with an average low of 64°. 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.
