S
M
T
W
T
F
S
26
85°
61°
27
91°
60°
28
92°
66°
29
89°
61°
30
87°
66°
1
91°
65°
2
89°
59°
3
84°
57°
4
86°
57°
5
87°
63°
6
91°
70°
7
91°
68°
8
89°
64°
9
88°
69°
10
88°
69°
11
90°
66°
12
91°
66°
13
89°
67°
14
90°
65°
15
86°
68°
16
87°
67°
17
87°
68°
18
89°
69°
19
89°
69°
20
88°
68°
21
89°
69°
22
90°
70°
23
90°
70°
24
89°
69°
25
90°
70°
26
89°
70°
27
90°
69°
28
87°
70°
29
88°
71°
30
87°
70°
31
85°
71°
1
86°
71°
2
84°
70°
3
86°
71°
4
86°
72°
5
87°
72°
6
87°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Pasco
Pasco's May 2026 forecast shows daily high temperatures ranging from 84° to 91°, with overnight lows between 57° and 72°. The average high for May is 88° 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 Pasco. See also: June | July | August.