S
M
T
W
T
F
S
26
63°
36°
27
65°
43°
28
65°
45°
29
71°
45°
30
76°
43°
1
81°
47°
2
85°
53°
3
84°
50°
4
83°
55°
5
80°
59°
6
82°
56°
7
76°
54°
8
76°
51°
9
76°
51°
10
74°
50°
11
76°
45°
12
81°
48°
13
69°
52°
14
67°
49°
15
60°
47°
16
58°
45°
17
63°
42°
18
70°
43°
19
73°
50°
20
73°
51°
21
77°
46°
22
82°
48°
23
84°
53°
24
84°
52°
25
85°
48°
26
67°
50°
27
75°
55°
28
83°
54°
29
80°
46°
30
76°
46°
31
73°
45°
1
80°
51°
2
88°
54°
3
87°
52°
4
88°
54°
5
78°
50°
6
81°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Washtucna
Washtucna's May 2026 forecast shows daily high temperatures ranging from 67° to 88°, with overnight lows between 45° and 55°. The average high for May is 81° with an average low of 51°. 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 Washtucna. See also: June | July | August.