S
M
T
W
T
F
S
26
85°
67°
27
85°
60°
28
80°
59°
29
80°
63°
30
79°
66°
31
80°
61°
1
81°
62°
2
82°
61°
3
81°
60°
4
80°
59°
5
82°
61°
6
83°
60°
7
Hist. Avg.
85°
66°
8
Hist. Avg.
85°
66°
9
Hist. Avg.
85°
66°
10
Hist. Avg.
85°
66°
11
Hist. Avg.
85°
66°
12
Hist. Avg.
85°
66°
13
Hist. Avg.
85°
66°
14
Hist. Avg.
85°
66°
15
Hist. Avg.
85°
65°
16
Hist. Avg.
84°
65°
17
Hist. Avg.
84°
65°
18
Hist. Avg.
84°
65°
19
Hist. Avg.
84°
65°
20
Hist. Avg.
84°
65°
21
Hist. Avg.
84°
65°
22
Hist. Avg.
84°
65°
23
Hist. Avg.
84°
64°
24
Hist. Avg.
84°
64°
25
Hist. Avg.
84°
64°
26
Hist. Avg.
84°
64°
27
Hist. Avg.
84°
64°
28
Hist. Avg.
83°
64°
29
Hist. Avg.
83°
63°
30
Hist. Avg.
83°
63°
31
Hist. Avg.
83°
63°
1
Hist. Avg.
83°
62°
2
Hist. Avg.
82°
62°
3
Hist. Avg.
82°
62°
4
Hist. Avg.
82°
62°
5
Hist. Avg.
82°
61°
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 79° to 85°, with overnight lows between 59° and 67°. The average high for August is 82° with an average low of 62°. 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.
