S
M
T
W
T
F
S
26
75°
49°
27
70°
48°
28
78°
50°
29
72°
54°
30
78°
52°
1
72°
54°
2
73°
49°
3
71°
49°
4
73°
50°
5
74°
53°
6
80°
57°
7
80°
57°
8
79°
56°
9
82°
57°
10
81°
56°
11
76°
50°
12
77°
49°
13
73°
49°
14
74°
57°
15
75°
58°
16
77°
55°
17
83°
60°
18
82°
57°
19
76°
53°
20
76°
60°
21
77°
61°
22
81°
62°
23
83°
62°
24
80°
61°
25
83°
62°
26
84°
63°
27
84°
62°
28
82°
61°
29
88°
63°
30
89°
63°
31
87°
62°
1
88°
60°
2
87°
58°
3
86°
59°
4
82°
59°
5
82°
64°
6
88°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Tremont
Tremont's May 2026 forecast shows daily high temperatures ranging from 70° to 89°, with overnight lows between 48° and 65°. The average high for May is 79° with an average low of 57°. 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 Tremont. See also: June | July | August.