S
M
T
W
T
F
S
26
58°
42°
27
55°
49°
28
57°
43°
29
69°
38°
30
73°
45°
1
64°
47°
2
73°
51°
3
86°
48°
4
67°
53°
5
64°
54°
6
57°
52°
7
62°
47°
8
60°
47°
9
71°
51°
10
63°
50°
11
75°
53°
12
73°
52°
13
58°
49°
14
59°
46°
15
55°
42°
16
58°
41°
17
61°
41°
18
62°
45°
19
64°
45°
20
66°
47°
21
71°
49°
22
69°
49°
23
62°
48°
24
62°
47°
25
65°
47°
26
64°
46°
27
64°
50°
28
59°
48°
29
60°
45°
30
61°
46°
31
67°
49°
1
67°
51°
2
61°
50°
3
60°
46°
4
60°
48°
5
61°
48°
6
60°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Montesano
Montesano's May 2026 forecast shows daily high temperatures ranging from 55° to 71°, with overnight lows between 41° and 51°. The average high for May is 62° with an average low of 47°. 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 Montesano. See also: June | July | August.
