S
M
T
W
T
F
S
26
76°
59°
27
74°
56°
28
75°
56°
29
75°
55°
30
76°
52°
31
73°
54°
1
73°
52°
2
71°
56°
3
74°
57°
4
77°
59°
5
76°
60°
6
78°
57°
7
77°
51°
8
76°
50°
9
75°
51°
10
75°
49°
11
68°
50°
12
69°
55°
13
75°
55°
14
76°
54°
15
76°
52°
16
75°
53°
17
76°
50°
18
75°
54°
19
73°
49°
20
73°
52°
21
70°
49°
22
67°
48°
23
68°
47°
24
67°
49°
25
68°
51°
26
66°
49°
27
66°
53°
28
67°
48°
29
67°
48°
30
69°
52°
31
70°
56°
1
71°
56°
2
74°
57°
3
77°
52°
4
76°
56°
5
74°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Montesano
Montesano's August 2026 forecast shows daily high temperatures ranging from 66° to 78°, with overnight lows between 47° and 60°. The average high for August is 73° with an average low of 53°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Montesano. See also: September | October | November.
