S
M
T
W
T
F
S
26
82°
63°
27
81°
66°
28
84°
65°
29
87°
63°
30
88°
67°
31
89°
63°
1
82°
58°
2
80°
59°
3
86°
64°
4
88°
67°
5
Hist. Avg.
84°
63°
6
Hist. Avg.
84°
63°
7
Hist. Avg.
84°
62°
8
Hist. Avg.
84°
62°
9
Hist. Avg.
84°
62°
10
Hist. Avg.
84°
62°
11
Hist. Avg.
84°
62°
12
Hist. Avg.
83°
62°
13
Hist. Avg.
83°
62°
14
Hist. Avg.
83°
62°
15
Hist. Avg.
83°
61°
16
Hist. Avg.
83°
61°
17
Hist. Avg.
83°
61°
18
Hist. Avg.
83°
61°
19
Hist. Avg.
83°
61°
20
Hist. Avg.
83°
60°
21
Hist. Avg.
82°
60°
22
Hist. Avg.
82°
60°
23
Hist. Avg.
82°
60°
24
Hist. Avg.
82°
60°
25
Hist. Avg.
82°
60°
26
Hist. Avg.
82°
59°
27
Hist. Avg.
82°
59°
28
Hist. Avg.
82°
59°
29
Hist. Avg.
81°
58°
30
Hist. Avg.
81°
58°
31
Hist. Avg.
81°
58°
1
Hist. Avg.
81°
58°
2
Hist. Avg.
81°
57°
3
Hist. Avg.
80°
57°
4
Hist. Avg.
80°
57°
5
Hist. Avg.
80°
56°
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 80° to 89°, with overnight lows between 58° and 67°. The average high for August is 85° with an average low of 64°. 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.
