S
M
T
W
T
F
S
26
84°
59°
27
88°
63°
28
79°
64°
29
82°
61°
30
70°
57°
1
64°
54°
2
72°
50°
3
73°
43°
4
81°
48°
5
77°
55°
6
81°
57°
7
72°
54°
8
72°
48°
9
75°
59°
10
81°
61°
11
79°
57°
12
82°
52°
13
84°
54°
14
79°
50°
15
82°
50°
16
86°
59°
17
88°
57°
18
90°
68°
19
90°
72°
20
88°
70°
21
82°
70°
22
81°
70°
23
86°
68°
24
84°
70°
25
79°
68°
26
84°
70°
27
88°
72°
28
84°
70°
29
86°
72°
30
88°
73°
31
N/A
1
88°
69°
2
89°
65°
3
87°
60°
4
87°
62°
5
85°
67°
6
86°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Smithville
Smithville's May 2026 forecast shows daily high temperatures ranging from 85° to 89°, with overnight lows between 60° and 71°. The average high for May is 87° with an average low of 66°. 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 Smithville. See also: June | July | August.