S
M
T
W
T
F
S
26
66°
38°
27
76°
33°
28
74°
37°
29
73°
42°
30
58°
45°
1
65°
39°
2
58°
44°
3
57°
37°
4
78°
34°
5
88°
47°
6
70°
49°
7
64°
45°
8
59°
35°
9
54°
36°
10
73°
49°
11
63°
46°
12
65°
34°
13
65°
44°
14
58°
51°
15
62°
41°
16
83°
45°
17
92°
48°
18
92°
53°
19
99°
62°
20
90°
62°
21
68°
52°
22
67°
41°
23
63°
48°
24
56°
47°
25
82°
53°
26
85°
49°
27
84°
55°
28
72°
49°
29
73°
52°
30
59°
42°
31
73°
51°
1
67°
48°
2
68°
49°
3
78°
52°
4
77°
55°
5
78°
59°
6
76°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Monson
Monson's May 2026 forecast shows daily high temperatures ranging from 59° to 84°, with overnight lows between 42° and 59°. The average high for May is 73° with an average low of 52°. 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 Monson. See also: June | July | August.