S
M
T
W
T
F
S
28
86°
64°
29
87°
65°
30
86°
65°
1
86°
66°
2
87°
66°
3
88°
65°
4
87°
66°
5
86°
64°
6
82°
61°
7
83°
62°
8
82°
61°
9
85°
64°
10
87°
66°
11
88°
66°
12
83°
65°
13
85°
66°
14
84°
66°
15
84°
65°
16
85°
66°
17
82°
65°
18
82°
63°
19
83°
65°
20
86°
65°
21
84°
66°
22
82°
65°
23
84°
66°
24
85°
61°
25
84°
62°
26
82°
62°
27
83°
63°
28
82°
61°
29
83°
62°
30
83°
62°
31
84°
63°
1
86°
66°
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 82° to 88°, with overnight lows between 61° and 66°. The average high for July is 84° 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.
