S
M
T
W
T
F
S
26
81°
56°
27
82°
56°
28
79°
62°
29
77°
56°
30
82°
53°
31
86°
49°
1
84°
65°
2
69°
60°
3
77°
51°
4
80°
47°
5
83°
49°
6
82°
58°
7
78°
65°
8
83°
58°
9
80°
54°
10
81°
64°
11
79°
58°
12
77°
57°
13
80°
59°
14
81°
56°
15
79°
53°
16
82°
63°
17
77°
52°
18
78°
62°
19
76°
48°
20
76°
46°
21
76°
53°
22
77°
55°
23
72°
53°
24
73°
52°
25
73°
52°
26
78°
57°
27
79°
56°
28
78°
58°
29
79°
48°
30
74°
57°
31
68°
51°
1
68°
55°
2
70°
56°
3
68°
56°
4
67°
54°
5
69°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Waterloo Airport
Waterloo Airport's August 2026 forecast shows daily high temperatures ranging from 67° to 82°, with overnight lows between 46° and 63°. The average high for August is 74° with an average low of 54°. 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 Waterloo Airport. See also: September | October | November.
