S
M
T
W
T
F
S
26
64°
43°
27
56°
46°
28
54°
46°
29
62°
44°
30
69°
46°
1
65°
50°
2
69°
49°
3
75°
55°
4
76°
55°
5
64°
51°
6
56°
49°
7
61°
49°
8
59°
48°
9
64°
47°
10
63°
50°
11
66°
49°
12
80°
50°
13
59°
51°
14
59°
47°
15
52°
45°
16
58°
42°
17
63°
45°
18
64°
48°
19
67°
49°
20
68°
48°
21
64°
51°
22
64°
50°
23
66°
49°
24
65°
50°
25
61°
50°
26
62°
49°
27
63°
51°
28
62°
50°
29
65°
49°
30
60°
45°
31
61°
46°
1
68°
53°
2
70°
54°
3
71°
54°
4
69°
53°
5
66°
50°
6
69°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Snohomish
Snohomish's May 2026 forecast shows daily high temperatures ranging from 58° to 71°, with overnight lows between 42° and 54°. The average high for May is 65° with an average low of 50°. 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 Snohomish. See also: June | July | August.