S
M
T
W
T
F
S
26
86°
63°
27
81°
63°
28
82°
54°
29
90°
63°
30
86°
70°
1
73°
59°
2
68°
54°
3
73°
45°
4
81°
46°
5
82°
52°
6
88°
61°
7
77°
70°
8
77°
63°
9
68°
63°
10
84°
64°
11
86°
64°
12
72°
61°
13
79°
61°
14
81°
59°
15
81°
50°
16
88°
61°
17
91°
67°
18
89°
67°
19
90°
67°
20
89°
68°
21
90°
67°
22
88°
68°
23
89°
69°
24
86°
69°
25
87°
68°
26
87°
69°
27
86°
67°
28
87°
66°
29
86°
66°
30
85°
65°
31
88°
67°
1
89°
69°
2
90°
69°
3
89°
68°
4
85°
69°
5
85°
69°
6
86°
68°
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 85° to 91°, with overnight lows between 65° and 69°. 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.