S
M
T
W
T
F
S
26
84°
64°
27
83°
64°
28
82°
63°
29
83°
62°
30
76°
58°
31
74°
55°
1
75°
55°
2
76°
58°
3
77°
61°
4
82°
62°
5
80°
62°
6
78°
61°
7
79°
62°
8
77°
61°
9
75°
60°
10
75°
54°
11
79°
60°
12
81°
62°
13
82°
61°
14
83°
60°
15
80°
61°
16
79°
60°
17
83°
53°
18
77°
53°
19
73°
52°
20
72°
51°
21
73°
51°
22
74°
52°
23
76°
51°
24
77°
51°
25
79°
52°
26
80°
59°
27
80°
56°
28
75°
52°
29
71°
56°
30
74°
57°
31
76°
52°
1
78°
48°
2
71°
49°
3
70°
51°
4
75°
58°
5
75°
54°
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 70° to 84°, with overnight lows between 48° and 64°. The average high for August is 77° with an average low of 57°. 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.
