S
M
T
W
T
F
S
26
82°
62°
27
84°
63°
28
80°
68°
29
80°
65°
30
84°
63°
31
87°
60°
1
84°
71°
2
71°
62°
3
81°
62°
4
82°
55°
5
85°
62°
6
84°
65°
7
80°
69°
8
86°
65°
9
82°
60°
10
85°
69°
11
84°
65°
12
82°
63°
13
82°
62°
14
80°
65°
15
75°
64°
16
76°
65°
17
79°
59°
18
79°
62°
19
78°
62°
20
77°
61°
21
75°
58°
22
75°
60°
23
77°
61°
24
75°
58°
25
75°
57°
26
73°
56°
27
79°
60°
28
71°
54°
29
73°
59°
30
77°
60°
31
78°
59°
1
79°
61°
2
78°
60°
3
78°
59°
4
75°
59°
5
75°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Mississauga
Mississauga's August 2026 forecast shows daily high temperatures ranging from 71° to 80°, with overnight lows between 54° and 65°. The average high for August is 76° with an average low of 60°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Mississauga. See also: September | October | November.
