S
M
T
W
T
F
S
26
98°
78°
27
101°
78°
28
97°
78°
29
95°
78°
30
98°
76°
1
96°
77°
2
98°
77°
3
99°
77°
4
98°
79°
5
93°
78°
6
98°
80°
7
98°
77°
8
99°
80°
9
99°
79°
10
100°
80°
11
99°
79°
12
96°
81°
13
97°
80°
14
96°
80°
15
97°
77°
16
99°
76°
17
98°
78°
18
99°
77°
19
97°
78°
20
99°
79°
21
102°
78°
22
95°
83°
23
95°
82°
24
94°
77°
25
94°
77°
26
93°
78°
27
91°
79°
28
91°
78°
29
90°
80°
30
91°
80°
31
88°
78°
1
89°
80°
2
89°
80°
3
90°
79°
4
89°
80°
5
89°
80°
6
90°
79°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Santo Tomas
Santo Tomas's May 2026 forecast shows daily high temperatures ranging from 88° to 102°, with overnight lows between 76° and 83°. The average high for May is 93° with an average low of 79°. 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 Santo Tomas. See also: June | July | August.