S
M
T
W
T
F
S
26
57°
37°
27
66°
34°
28
55°
46°
29
52°
45°
30
48°
37°
1
48°
32°
2
45°
32°
3
54°
32°
4
72°
41°
5
72°
54°
6
55°
43°
7
55°
34°
8
55°
32°
9
55°
45°
10
63°
41°
11
55°
32°
12
63°
28°
13
63°
45°
14
45°
41°
15
64°
41°
16
75°
39°
17
82°
61°
18
86°
61°
19
82°
66°
20
73°
52°
21
55°
43°
22
57°
39°
23
52°
41°
24
60°
54°
25
72°
52°
26
81°
53°
27
79°
53°
28
73°
46°
29
69°
46°
30
66°
46°
31
67°
47°
1
72°
51°
2
75°
53°
3
74°
53°
4
73°
55°
5
74°
53°
6
75°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Northwest
Northwest's May 2026 forecast shows daily high temperatures ranging from 60° to 81°, with overnight lows between 46° and 55°. The average high for May is 72° with an average low of 51°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Northwest. See also: June | July | August.
