S
M
T
W
T
F
S
26
56°
34°
27
53°
35°
28
57°
35°
29
56°
40°
30
44°
37°
1
58°
31°
2
69°
38°
3
72°
47°
4
70°
44°
5
47°
31°
6
37°
29°
7
67°
36°
8
67°
39°
9
73°
45°
10
67°
45°
11
83°
45°
12
78°
55°
13
85°
52°
14
84°
62°
15
82°
50°
16
76°
54°
17
62°
45°
18
48°
35°
19
49°
40°
20
58°
40°
21
64°
44°
22
71°
49°
23
73°
51°
24
75°
52°
25
77°
53°
26
78°
54°
27
70°
53°
28
73°
52°
29
73°
54°
30
74°
47°
31
70°
49°
1
68°
52°
2
68°
50°
3
67°
43°
4
70°
48°
5
73°
49°
6
73°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Waterton
Waterton's May 2026 forecast shows daily high temperatures ranging from 48° to 78°, with overnight lows between 35° and 54°. The average high for May is 68° with an average low of 48°. 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 Waterton. See also: June | July | August.
