S
M
T
W
T
F
S
26
70°
48°
27
69°
49°
28
69°
48°
29
70°
49°
30
71°
47°
31
71°
56°
1
76°
54°
2
70°
53°
3
75°
49°
4
72°
49°
5
70°
50°
6
69°
52°
7
71°
48°
8
69°
46°
9
72°
52°
10
75°
53°
11
76°
52°
12
71°
54°
13
69°
52°
14
74°
52°
15
76°
47°
16
73°
55°
17
76°
56°
18
78°
55°
19
78°
54°
20
77°
56°
21
78°
55°
22
76°
51°
23
75°
45°
24
67°
44°
25
65°
48°
26
70°
50°
27
66°
45°
28
65°
52°
29
67°
53°
30
73°
46°
31
68°
43°
1
63°
41°
2
63°
42°
3
Hist. Avg.
66°
44°
4
Hist. Avg.
66°
44°
5
Hist. Avg.
65°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Mount MacDonald
Mount MacDonald's August 2026 forecast shows daily high temperatures ranging from 63° to 78°, with overnight lows between 41° and 56°. The average high for August is 71° with an average low of 50°. 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 Mount MacDonald. See also: September | October | November.