S
M
T
W
T
F
S
26
81°
65°
27
79°
62°
28
78°
59°
29
79°
63°
30
85°
66°
31
85°
65°
1
81°
62°
2
83°
65°
3
85°
58°
4
79°
59°
5
79°
62°
6
80°
58°
7
79°
57°
8
80°
56°
9
80°
56°
10
79°
63°
11
81°
60°
12
80°
59°
13
85°
56°
14
78°
56°
15
80°
57°
16
80°
57°
17
77°
56°
18
78°
56°
19
78°
55°
20
80°
59°
21
81°
63°
22
82°
64°
23
85°
65°
24
86°
64°
25
87°
60°
26
84°
56°
27
79°
61°
28
83°
62°
29
82°
55°
30
81°
53°
31
77°
52°
1
75°
56°
2
75°
54°
3
76°
54°
4
75°
53°
5
74°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Marengo
Marengo's August 2026 forecast shows daily high temperatures ranging from 74° to 87°, with overnight lows between 52° and 66°. The average high for August is 80° 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 Marengo. See also: September | October | November.
