S
M
T
W
T
F
S
26
76°
53°
27
74°
50°
28
75°
51°
29
75°
50°
30
76°
50°
31
77°
51°
1
79°
52°
2
81°
57°
3
81°
59°
4
80°
54°
5
77°
53°
6
78°
58°
7
81°
58°
8
82°
57°
9
80°
58°
10
81°
59°
11
83°
51°
12
80°
50°
13
76°
53°
14
80°
53°
15
73°
56°
16
76°
51°
17
Hist. Avg.
74°
54°
18
Hist. Avg.
73°
53°
19
Hist. Avg.
73°
53°
20
Hist. Avg.
73°
53°
21
Hist. Avg.
72°
52°
22
Hist. Avg.
72°
52°
23
Hist. Avg.
72°
52°
24
Hist. Avg.
71°
52°
25
Hist. Avg.
71°
51°
26
Hist. Avg.
71°
51°
27
Hist. Avg.
70°
51°
28
Hist. Avg.
70°
50°
29
Hist. Avg.
70°
50°
30
Hist. Avg.
69°
50°
31
Hist. Avg.
69°
49°
1
Hist. Avg.
68°
49°
2
Hist. Avg.
68°
49°
3
Hist. Avg.
68°
48°
4
Hist. Avg.
67°
48°
5
Hist. Avg.
67°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Waterloo
Waterloo's August 2026 forecast shows daily high temperatures ranging from 73° to 83°, with overnight lows between 50° and 59°. The average high for August is 78° 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. See also: September | October | November.
