S
M
T
W
T
F
S
26
90°
58°
27
91°
59°
28
91°
59°
29
92°
60°
30
92°
59°
31
91°
60°
1
92°
58°
2
91°
61°
3
92°
62°
4
93°
60°
5
95°
60°
6
94°
59°
7
92°
58°
8
91°
57°
9
Hist. Avg.
95°
60°
10
Hist. Avg.
95°
60°
11
Hist. Avg.
95°
60°
12
Hist. Avg.
95°
60°
13
Hist. Avg.
95°
60°
14
Hist. Avg.
95°
60°
15
Hist. Avg.
95°
60°
16
Hist. Avg.
95°
60°
17
Hist. Avg.
95°
60°
18
Hist. Avg.
95°
60°
19
Hist. Avg.
95°
60°
20
Hist. Avg.
95°
60°
21
Hist. Avg.
95°
59°
22
Hist. Avg.
95°
59°
23
Hist. Avg.
95°
59°
24
Hist. Avg.
95°
59°
25
Hist. Avg.
95°
59°
26
Hist. Avg.
95°
59°
27
Hist. Avg.
95°
59°
28
Hist. Avg.
95°
59°
29
Hist. Avg.
94°
59°
30
Hist. Avg.
94°
59°
31
Hist. Avg.
94°
59°
1
Hist. Avg.
94°
59°
2
Hist. Avg.
94°
59°
3
Hist. Avg.
94°
59°
4
Hist. Avg.
94°
58°
5
Hist. Avg.
94°
58°
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 90° to 95°, with overnight lows between 57° and 62°. The average high for August is 92° with an average low of 59°. 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.
