S
M
T
W
T
F
S
26
71°
36°
27
57°
44°
28
61°
48°
29
72°
38°
30
80°
42°
1
75°
46°
2
76°
51°
3
89°
53°
4
74°
55°
5
77°
51°
6
78°
47°
7
74°
49°
8
71°
47°
9
75°
50°
10
82°
54°
11
81°
54°
12
76°
49°
13
73°
52°
14
75°
49°
15
73°
50°
16
64°
53°
17
69°
48°
18
63°
46°
19
63°
45°
20
66°
47°
21
74°
53°
22
73°
50°
23
68°
48°
24
75°
54°
25
73°
50°
26
71°
50°
27
75°
55°
28
75°
56°
29
76°
55°
30
77°
56°
31
78°
57°
1
77°
55°
2
76°
56°
3
75°
53°
4
74°
51°
5
73°
51°
6
72°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Washougal
Washougal's May 2026 forecast shows daily high temperatures ranging from 63° to 89°, with overnight lows between 45° and 57°. The average high for May is 74° 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 Washougal. See also: June | July | August.