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
83°
62°
14
81°
60°
15
76°
67°
16
80°
66°
17
80°
64°
18
80°
65°
19
77°
59°
20
77°
61°
21
77°
65°
22
76°
60°
23
72°
56°
24
74°
57°
25
75°
59°
26
76°
58°
27
74°
58°
28
75°
60°
29
75°
58°
30
74°
59°
31
73°
53°
1
71°
56°
2
72°
59°
3
69°
58°
4
69°
58°
5
71°
54°
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 69° to 80°, with overnight lows between 53° and 65°. The average high for August is 74° with an average low of 59°. 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.
