S
M
T
W
T
F
S
26
43°
25°
27
45°
24°
28
43°
26°
29
45°
20°
30
42°
21°
1
44°
22°
2
54°
17°
3
53°
23°
4
50°
25°
5
52°
28°
6
35°
16°
7
49°
10°
8
59°
31°
9
59°
29°
10
61°
24°
11
66°
24°
12
70°
27°
13
70°
27°
14
66°
33°
15
65°
28°
16
69°
39°
17
58°
40°
18
49°
27°
19
52°
30°
20
54°
32°
21
56°
30°
22
60°
33°
23
60°
35°
24
63°
37°
25
64°
39°
26
65°
40°
27
65°
38°
28
69°
40°
29
63°
29°
30
63°
33°
31
58°
31°
1
58°
34°
2
59°
32°
3
57°
26°
4
61°
32°
5
64°
32°
6
65°
30°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Dillon
Dillon's May 2026 forecast shows daily high temperatures ranging from 49° to 69°, with overnight lows between 26° and 40°. The average high for May is 61° with an average low of 34°. 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 Dillon. See also: June | July | August.