S
M
T
W
T
F
S
26
51°
41°
27
53°
41°
28
57°
39°
29
50°
28°
30
48°
23°
1
53°
26°
2
64°
26°
3
68°
53°
4
61°
34°
5
49°
29°
6
47°
30°
7
54°
29°
8
59°
34°
9
63°
38°
10
66°
40°
11
64°
41°
12
67°
46°
13
68°
46°
14
66°
44°
15
65°
46°
16
70°
45°
17
69°
47°
18
69°
50°
19
70°
49°
20
68°
48°
21
64°
42°
22
63°
41°
23
64°
43°
24
64°
42°
25
65°
42°
26
64°
44°
27
64°
43°
28
65°
43°
29
67°
53°
30
66°
51°
31
67°
50°
1
73°
54°
2
75°
55°
3
77°
55°
4
77°
56°
5
78°
57°
6
77°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Siren
Siren's May 2026 forecast shows daily high temperatures ranging from 47° to 78°, with overnight lows between 29° and 57°. The average high for May is 66° with an average low of 45°. 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 Siren. See also: June | July | August.
