S
M
T
W
T
F
S
26
82°
56°
27
82°
64°
28
74°
62°
29
80°
59°
30
66°
51°
1
63°
46°
2
68°
45°
3
70°
40°
4
78°
48°
5
75°
56°
6
76°
55°
7
69°
49°
8
72°
56°
9
80°
58°
10
81°
61°
11
71°
47°
12
74°
50°
13
78°
55°
14
78°
52°
15
80°
58°
16
84°
62°
17
86°
62°
18
87°
64°
19
85°
65°
20
88°
66°
21
87°
67°
22
78°
63°
23
79°
63°
24
78°
62°
25
79°
63°
26
78°
63°
27
79°
62°
28
80°
63°
29
80°
63°
30
78°
62°
31
78°
64°
1
80°
63°
2
81°
65°
3
83°
65°
4
82°
66°
5
82°
67°
6
83°
66°
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 71° to 88°, with overnight lows between 47° and 67°. The average high for May is 80° with an average low of 61°. 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.