S
M
T
W
T
F
S
26
81°
51°
27
85°
53°
28
83°
53°
29
80°
56°
30
80°
54°
31
85°
55°
1
85°
56°
2
86°
57°
3
86°
56°
4
85°
55°
5
85°
55°
6
86°
58°
7
88°
59°
8
86°
58°
9
78°
54°
10
77°
53°
11
77°
51°
12
78°
51°
13
78°
52°
14
82°
56°
15
82°
55°
16
78°
52°
17
78°
49°
18
80°
49°
19
84°
50°
20
85°
53°
21
82°
52°
22
85°
56°
23
85°
52°
24
76°
55°
25
82°
53°
26
77°
46°
27
76°
48°
28
75°
50°
29
75°
48°
30
74°
47°
31
76°
54°
1
79°
56°
2
84°
54°
3
86°
55°
4
80°
47°
5
74°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Forest Grove
Forest Grove's August 2026 forecast shows daily high temperatures ranging from 74° to 88°, with overnight lows between 46° and 59°. The average high for August is 81° 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 Forest Grove. See also: September | October | November.
