S
M
T
W
T
F
S
26
70°
43°
27
59°
43°
28
55°
38°
29
46°
31°
30
39°
28°
1
46°
29°
2
60°
24°
3
67°
44°
4
60°
39°
5
43°
31°
6
40°
33°
7
51°
29°
8
62°
25°
9
53°
30°
10
47°
28°
11
57°
23°
12
68°
40°
13
59°
36°
14
71°
29°
15
82°
51°
16
74°
43°
17
57°
38°
18
71°
50°
19
58°
41°
20
56°
38°
21
65°
34°
22
68°
46°
23
57°
45°
24
76°
53°
25
80°
60°
26
82°
47°
27
63°
44°
28
75°
45°
29
70°
44°
30
66°
45°
31
69°
49°
1
71°
49°
2
71°
51°
3
72°
51°
4
71°
52°
5
84°
53°
6
65°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Marengo
Marengo's May 2026 forecast shows daily high temperatures ranging from 57° to 84°, with overnight lows between 44° and 60°. The average high for May is 71° with an average low of 49°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Marengo. See also: June | July | August.
