S
M
T
W
T
F
S
26
86°
72°
27
91°
74°
28
88°
70°
29
76°
61°
30
66°
60°
1
60°
53°
2
78°
46°
3
81°
49°
4
82°
60°
5
86°
71°
6
62°
56°
7
73°
59°
8
78°
65°
9
83°
66°
10
84°
60°
11
80°
61°
12
88°
68°
13
87°
73°
14
85°
70°
15
80°
69°
16
84°
70°
17
82°
69°
18
85°
70°
19
84°
65°
20
83°
70°
21
85°
69°
22
86°
69°
23
80°
68°
24
80°
70°
25
81°
70°
26
81°
69°
27
82°
69°
28
82°
68°
29
83°
69°
30
82°
68°
31
83°
67°
1
83°
68°
2
84°
69°
3
85°
70°
4
84°
72°
5
85°
73°
6
87°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Waco
Waco's May 2026 forecast shows daily high temperatures ranging from 62° to 88°, with overnight lows between 56° and 73°. The average high for May is 82° with an average low of 68°. 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 Waco. See also: June | July | August.