S
M
T
W
T
F
S
26
86°
75°
27
89°
72°
28
89°
71°
29
90°
72°
30
89°
73°
31
88°
73°
1
87°
74°
2
91°
74°
3
90°
73°
4
91°
74°
5
89°
72°
6
86°
71°
7
87°
72°
8
88°
71°
9
89°
72°
10
87°
71°
11
88°
73°
12
90°
73°
13
88°
72°
14
89°
73°
15
89°
73°
16
90°
72°
17
90°
69°
18
87°
69°
19
86°
71°
20
89°
71°
21
90°
72°
22
88°
70°
23
87°
69°
24
88°
70°
25
89°
68°
26
86°
72°
27
89°
68°
28
88°
67°
29
84°
68°
30
85°
68°
31
85°
69°
1
86°
67°
2
87°
71°
3
88°
67°
4
88°
68°
5
87°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Northwest
Northwest's August 2026 forecast shows daily high temperatures ranging from 84° to 91°, with overnight lows between 67° and 75°. The average high for August is 88° with an average low of 71°. 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 Northwest. See also: September | October | November.
