S
M
T
W
T
F
S
26
55°
41°
27
63°
37°
28
63°
30°
29
67°
36°
30
67°
33°
1
68°
30°
2
75°
32°
3
79°
38°
4
72°
43°
5
69°
39°
6
68°
40°
7
81°
33°
8
84°
42°
9
80°
42°
10
83°
37°
11
92°
40°
12
93°
49°
13
83°
50°
14
81°
46°
15
85°
46°
16
81°
44°
17
70°
37°
18
64°
37°
19
72°
38°
20
77°
41°
21
80°
50°
22
83°
50°
23
87°
52°
24
85°
47°
25
83°
46°
26
93°
47°
27
75°
48°
28
74°
42°
29
74°
44°
30
81°
47°
31
85°
50°
1
86°
51°
2
87°
52°
3
87°
53°
4
86°
52°
5
82°
51°
6
84°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Thermo
Thermo's May 2026 forecast shows daily high temperatures ranging from 64° to 93°, with overnight lows between 37° and 53°. The average high for May is 81° with an average low of 47°. 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 Thermo. See also: June | July | August.