S
M
T
W
T
F
S
26
85°
72°
27
85°
73°
28
86°
73°
29
86°
72°
30
88°
73°
31
88°
73°
1
89°
72°
2
89°
72°
3
86°
71°
4
85°
72°
5
88°
72°
6
86°
71°
7
84°
71°
8
84°
70°
9
85°
70°
10
86°
72°
11
88°
72°
12
86°
71°
13
84°
70°
14
86°
69°
15
84°
70°
16
84°
71°
17
88°
69°
18
89°
70°
19
88°
69°
20
88°
68°
21
87°
64°
22
83°
65°
23
82°
65°
24
84°
67°
25
84°
69°
26
86°
69°
27
87°
68°
28
87°
69°
29
86°
69°
30
87°
65°
31
88°
64°
1
82°
65°
2
81°
67°
3
82°
68°
4
86°
68°
5
86°
66°
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 81° to 89°, with overnight lows between 64° and 73°. The average high for August is 86° with an average low of 69°. 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.
