S
M
T
W
T
F
S
26
74°
40°
27
68°
51°
28
62°
48°
29
76°
39°
30
81°
39°
1
85°
40°
2
86°
56°
3
91°
49°
4
82°
51°
5
76°
59°
6
78°
61°
7
78°
55°
8
73°
48°
9
83°
46°
10
74°
48°
11
82°
48°
12
88°
46°
13
65°
54°
14
68°
52°
15
65°
49°
16
62°
45°
17
69°
46°
18
75°
52°
19
76°
48°
20
77°
54°
21
84°
50°
22
87°
45°
23
80°
51°
24
79°
53°
25
74°
44°
26
65°
47°
27
72°
53°
28
73°
53°
29
78°
46°
30
69°
42°
31
66°
41°
1
77°
49°
2
82°
52°
3
81°
51°
4
80°
52°
5
73°
48°
6
74°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Wasco
Wasco's May 2026 forecast shows daily high temperatures ranging from 65° to 82°, with overnight lows between 41° and 53°. The average high for May is 75° with an average low of 48°. 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 Wasco. See also: June | July | August.