S
M
T
W
T
F
S
26
76°
45°
27
77°
46°
28
78°
49°
29
77°
55°
30
84°
56°
1
81°
55°
2
78°
46°
3
73°
51°
4
77°
55°
5
75°
64°
6
72°
61°
7
79°
56°
8
75°
56°
9
76°
51°
10
77°
57°
11
87°
53°
12
78°
54°
13
73°
58°
14
76°
54°
15
77°
50°
16
67°
52°
17
73°
49°
18
76°
50°
19
77°
54°
20
82°
52°
21
84°
56°
22
87°
55°
23
86°
54°
24
88°
54°
25
91°
57°
26
91°
56°
27
94°
60°
28
97°
61°
29
87°
61°
30
84°
61°
31
83°
63°
1
82°
61°
2
85°
64°
3
81°
61°
4
81°
63°
5
82°
66°
6
86°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Oristano
Oristano's May 2026 forecast shows daily high temperatures ranging from 81° to 87°, with overnight lows between 61° and 66°. The average high for May is 83° with an average low of 63°. 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 Oristano. See also: June | July | August.