S
M
T
W
T
F
S
26
66°
36°
27
72°
37°
28
64°
37°
29
55°
42°
30
46°
42°
1
60°
42°
2
45°
36°
3
51°
41°
4
65°
38°
5
73°
47°
6
61°
51°
7
63°
45°
8
57°
38°
9
60°
33°
10
66°
46°
11
61°
42°
12
57°
37°
13
53°
37°
14
64°
46°
15
59°
52°
16
76°
51°
17
81°
53°
18
67°
51°
19
89°
49°
20
88°
63°
21
67°
45°
22
70°
38°
23
68°
43°
24
57°
45°
25
72°
48°
26
81°
62°
27
82°
54°
28
64°
47°
29
60°
44°
30
57°
42°
31
63°
45°
1
63°
46°
2
65°
46°
3
68°
51°
4
72°
55°
5
74°
57°
6
71°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Monmouth
Monmouth's May 2026 forecast shows daily high temperatures ranging from 57° to 82°, with overnight lows between 42° and 62°. The average high for May is 68° with an average low of 50°. 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 Monmouth. See also: June | July | August.
