S
M
T
W
T
F
S
26
69°
37°
27
59°
38°
28
61°
44°
29
69°
38°
30
79°
42°
1
73°
46°
2
67°
49°
3
89°
50°
4
73°
51°
5
67°
51°
6
71°
52°
7
72°
52°
8
69°
46°
9
78°
45°
10
72°
50°
11
80°
48°
12
79°
51°
13
64°
51°
14
64°
42°
15
58°
43°
16
60°
44°
17
64°
41°
18
70°
42°
19
72°
46°
20
73°
46°
21
72°
45°
22
71°
46°
23
68°
48°
24
72°
47°
25
69°
46°
26
71°
47°
27
70°
49°
28
65°
43°
29
65°
43°
30
66°
46°
31
73°
49°
1
73°
49°
2
69°
50°
3
65°
44°
4
65°
44°
5
64°
45°
6
65°
43°
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 58° to 73°, with overnight lows between 41° and 50°. The average high for May is 68° with an average low of 45°. 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.
