S
M
T
W
T
F
S
26
60°
45°
27
55°
43°
28
57°
41°
29
52°
46°
30
53°
39°
1
58°
38°
2
56°
43°
3
59°
44°
4
63°
46°
5
60°
42°
6
57°
41°
7
56°
42°
8
57°
43°
9
58°
44°
10
53°
42°
11
50°
42°
12
51°
41°
13
51°
44°
14
52°
41°
15
50°
41°
16
51°
42°
17
51°
43°
18
52°
44°
19
51°
44°
20
52°
45°
21
52°
43°
22
51°
42°
23
53°
44°
24
52°
43°
25
52°
41°
26
51°
42°
27
51°
41°
28
52°
43°
29
52°
42°
30
53°
42°
31
53°
43°
1
54°
46°
2
53°
43°
3
53°
42°
4
54°
44°
5
53°
46°
6
54°
45°
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 50° to 63°, with overnight lows between 38° and 46°. The average high for May is 54° with an average low of 43°. 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.