S
M
T
W
T
F
S
26
59°
33°
27
78°
37°
28
62°
43°
29
48°
39°
30
51°
36°
1
43°
33°
2
42°
31°
3
47°
40°
4
55°
42°
5
47°
34°
6
48°
36°
7
45°
35°
8
45°
37°
9
48°
38°
10
51°
38°
11
55°
39°
12
55°
42°
13
54°
43°
14
55°
39°
15
54°
38°
16
55°
40°
17
55°
42°
18
56°
47°
19
58°
47°
20
62°
46°
21
62°
48°
22
60°
43°
23
57°
45°
24
60°
42°
25
57°
40°
26
58°
47°
27
58°
50°
28
66°
49°
29
62°
46°
30
60°
44°
31
60°
41°
1
59°
42°
2
58°
42°
3
61°
43°
4
60°
44°
5
61°
48°
6
61°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Seguin
Seguin's May 2026 forecast shows daily high temperatures ranging from 42° to 66°, with overnight lows between 31° and 50°. The average high for May is 55° with an average low of 42°. 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 Seguin. See also: June | July | August.
