S
M
T
W
T
F
S
26
71°
43°
27
72°
54°
28
62°
49°
29
55°
39°
30
61°
38°
1
51°
37°
2
57°
33°
3
72°
44°
4
82°
45°
5
57°
44°
6
55°
37°
7
64°
33°
8
71°
43°
9
72°
39°
10
66°
37°
11
66°
42°
12
75°
46°
13
60°
41°
14
69°
48°
15
75°
53°
16
77°
55°
17
76°
56°
18
74°
50°
19
75°
53°
20
75°
56°
21
78°
56°
22
73°
50°
23
75°
54°
24
77°
56°
25
78°
57°
26
79°
58°
27
79°
59°
28
78°
58°
29
79°
58°
30
78°
57°
31
73°
53°
1
71°
52°
2
70°
58°
3
77°
59°
4
79°
59°
5
78°
58°
6
77°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Oregon
Oregon's May 2026 forecast shows daily high temperatures ranging from 60° to 79°, with overnight lows between 37° and 59°. The average high for May is 74° 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 May weather will actually feel in Oregon. See also: June | July | August.
