S
M
T
W
T
F
S
28
88°
75°
29
87°
75°
30
87°
74°
1
88°
74°
2
89°
75°
3
90°
74°
4
90°
74°
5
91°
75°
6
90°
73°
7
85°
74°
8
86°
75°
9
87°
75°
10
87°
74°
11
88°
75°
12
89°
75°
13
89°
74°
14
90°
75°
15
89°
75°
16
89°
74°
17
90°
75°
18
91°
74°
19
92°
75°
20
91°
73°
21
92°
71°
22
93°
71°
23
91°
72°
24
93°
71°
25
89°
70°
26
89°
71°
27
90°
72°
28
90°
72°
29
91°
73°
30
91°
72°
31
90°
72°
1
89°
73°
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 85° to 93°, with overnight lows between 70° and 75°. The average high for July is 89° with an average low of 73°. 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.
