S
M
T
W
T
F
S
26
54°
41°
27
51°
41°
28
53°
40°
29
49°
41°
30
49°
42°
1
50°
42°
2
51°
41°
3
49°
42°
4
49°
40°
5
50°
40°
6
54°
42°
7
55°
43°
8
54°
43°
9
50°
42°
10
51°
42°
11
52°
43°
12
54°
44°
13
56°
44°
14
56°
43°
15
54°
44°
16
53°
44°
17
52°
43°
18
52°
45°
19
53°
45°
20
52°
44°
21
57°
46°
22
53°
43°
23
53°
41°
24
52°
41°
25
53°
44°
26
55°
42°
27
52°
44°
28
52°
43°
29
53°
44°
30
54°
48°
31
59°
46°
1
59°
44°
2
54°
44°
3
54°
45°
4
56°
44°
5
55°
47°
6
57°
43°
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 49° to 59°, with overnight lows between 40° and 48°. The average high for May is 53° 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.