S
M
T
W
T
F
S
26
60°
45°
27
57°
42°
28
62°
41°
29
57°
50°
30
54°
51°
1
61°
47°
2
57°
48°
3
60°
47°
4
82°
43°
5
59°
47°
6
53°
40°
7
58°
44°
8
56°
49°
9
52°
47°
10
52°
46°
11
53°
43°
12
51°
42°
13
53°
43°
14
54°
44°
15
54°
45°
16
55°
44°
17
57°
44°
18
56°
43°
19
55°
42°
20
52°
42°
21
51°
45°
22
52°
45°
23
52°
42°
24
51°
41°
25
51°
41°
26
52°
42°
27
51°
41°
28
52°
41°
29
53°
44°
30
53°
46°
31
54°
46°
1
53°
44°
2
54°
44°
3
53°
44°
4
56°
47°
5
57°
48°
6
59°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Waterfall
Waterfall's May 2026 forecast shows daily high temperatures ranging from 51° to 59°, with overnight lows between 40° and 49°. The average high for May is 54° with an average low of 44°. 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 Waterfall. See also: June | July | August.