S
M
T
W
T
F
S
26
35°
20°
27
45°
26°
28
50°
22°
29
49°
30°
30
55°
29°
1
66°
33°
2
68°
41°
3
76°
37°
4
66°
33°
5
45°
28°
6
54°
21°
7
63°
29°
8
73°
38°
9
62°
33°
10
69°
32°
11
81°
49°
12
75°
45°
13
84°
43°
14
70°
53°
15
67°
43°
16
64°
32°
17
50°
39°
18
42°
35°
19
60°
31°
20
70°
43°
21
56°
43°
22
63°
45°
23
72°
43°
24
84°
48°
25
90°
50°
26
94°
59°
27
93°
60°
28
92°
63°
29
86°
63°
30
72°
59°
31
77°
52°
1
69°
46°
2
72°
50°
3
72°
51°
4
73°
47°
5
82°
53°
6
94°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Williston
Williston's May 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for May is ° with an average low of °. 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 Williston. See also: June | July | August.