S
M
T
W
T
F
S
26
82°
70°
27
82°
70°
28
83°
68°
29
84°
70°
30
82°
70°
1
81°
70°
2
81°
71°
3
83°
70°
4
80°
71°
5
85°
71°
6
82°
72°
7
82°
71°
8
78°
71°
9
82°
70°
10
82°
71°
11
85°
72°
12
84°
70°
13
78°
71°
14
79°
72°
15
85°
71°
16
82°
69°
17
82°
70°
18
84°
70°
19
84°
69°
20
82°
69°
21
82°
68°
22
82°
70°
23
85°
69°
24
84°
69°
25
83°
68°
26
82°
69°
27
82°
71°
28
84°
70°
29
83°
36°
30
94°
70°
31
94°
70°
1
93°
70°
2
91°
67°
3
92°
67°
4
91°
70°
5
89°
66°
6
89°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Sullana
Sullana's May 2026 forecast shows daily high temperatures ranging from 89° to 94°, with overnight lows between 65° and 70°. The average high for May is 92° with an average low of 68°. 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 Sullana. See also: June | July | August.