S
M
T
W
T
F
S
31
67°
41°
1
78°
45°
2
83°
51°
3
64°
51°
4
64°
49°
5
59°
46°
6
60°
42°
7
65°
48°
8
59°
49°
9
63°
49°
10
64°
50°
11
66°
49°
12
70°
52°
13
73°
52°
14
70°
53°
15
72°
51°
16
65°
50°
17
64°
47°
18
67°
48°
19
63°
47°
20
68°
51°
21
69°
49°
22
63°
48°
23
62°
47°
24
63°
47°
25
68°
49°
26
71°
54°
27
72°
54°
28
71°
53°
29
71°
52°
30
70°
52°
1
69°
51°
2
65°
49°
3
69°
50°
4
70°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Montesano
Montesano's June 2026 forecast shows daily high temperatures ranging from 59° to 73°, with overnight lows between 42° and 54°. The average high for June is 67° 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 June weather will actually feel in Montesano. See also: July | August | September.