S
M
T
W
T
F
S
26
78°
61°
27
84°
62°
28
80°
62°
29
81°
61°
30
80°
56°
31
77°
54°
1
77°
55°
2
80°
60°
3
81°
61°
4
84°
62°
5
82°
62°
6
83°
61°
7
82°
58°
8
84°
60°
9
84°
57°
10
81°
52°
11
76°
55°
12
78°
56°
13
79°
53°
14
77°
53°
15
77°
56°
16
75°
60°
17
76°
59°
18
77°
56°
19
77°
58°
20
76°
54°
21
78°
59°
22
81°
59°
23
76°
58°
24
80°
59°
25
81°
51°
26
78°
52°
27
75°
53°
28
74°
56°
29
74°
57°
30
73°
58°
31
74°
57°
1
76°
50°
2
73°
50°
3
73°
51°
4
74°
49°
5
73°
49°
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 73° to 84°, with overnight lows between 49° and 62°. The average high for August is 78° with an average low of 56°. 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.
