S
M
T
W
T
F
S
26
83°
60°
27
80°
59°
28
81°
60°
29
82°
59°
30
75°
57°
31
74°
58°
1
75°
60°
2
82°
61°
3
83°
60°
4
80°
59°
5
75°
59°
6
81°
60°
7
83°
58°
8
79°
51°
9
76°
50°
10
74°
51°
11
75°
50°
12
74°
49°
13
74°
50°
14
77°
55°
15
78°
54°
16
74°
49°
17
75°
51°
18
80°
57°
19
80°
57°
20
79°
56°
21
81°
56°
22
80°
55°
23
80°
53°
24
79°
50°
25
76°
54°
26
71°
55°
27
78°
49°
28
71°
51°
29
72°
48°
30
71°
47°
31
70°
51°
1
69°
47°
2
70°
47°
3
73°
51°
4
77°
53°
5
75°
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 69° to 83°, with overnight lows between 47° and 61°. The average high for August is 77° 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 Marengo. See also: September | October | November.
