S
M
T
W
T
F
S
26
63°
31°
27
70°
39°
28
63°
35°
29
57°
36°
30
44°
40°
1
48°
33°
2
40°
30°
3
48°
34°
4
54°
43°
5
70°
50°
6
58°
45°
7
58°
40°
8
52°
35°
9
55°
38°
10
54°
39°
11
55°
39°
12
56°
36°
13
58°
40°
14
59°
42°
15
58°
41°
16
61°
43°
17
59°
41°
18
63°
46°
19
66°
45°
20
65°
46°
21
64°
46°
22
65°
47°
23
60°
44°
24
59°
43°
25
60°
44°
26
60°
45°
27
61°
45°
28
61°
43°
29
62°
42°
30
62°
46°
31
64°
49°
1
64°
45°
2
63°
44°
3
65°
50°
4
69°
50°
5
64°
49°
6
67°
51°
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 52° to 70°, with overnight lows between 35° and 51°. The average high for May is 61° with an average low of 44°. 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.