S
M
T
W
T
F
S
26
79°
62°
27
81°
61°
28
82°
62°
29
82°
64°
30
83°
63°
31
82°
63°
1
79°
61°
2
76°
59°
3
75°
60°
4
77°
62°
5
79°
62°
6
80°
61°
7
81°
62°
8
82°
63°
9
82°
63°
10
81°
62°
11
82°
62°
12
81°
61°
13
82°
63°
14
85°
62°
15
85°
61°
16
78°
62°
17
82°
61°
18
82°
61°
19
81°
56°
20
79°
52°
21
72°
51°
22
72°
53°
23
73°
53°
24
75°
54°
25
73°
52°
26
72°
57°
27
72°
54°
28
73°
50°
29
71°
51°
30
72°
50°
31
71°
50°
1
70°
53°
2
71°
52°
3
71°
54°
4
72°
53°
5
72°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Mississauga Valley
Mississauga Valley's August 2026 forecast shows daily high temperatures ranging from 70° to 85°, with overnight lows between 50° and 64°. The average high for August is 77° with an average low of 58°. 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 Valley. See also: September | October | November.
