S
M
T
W
T
F
S
26
54°
44°
27
73°
41°
28
66°
50°
29
54°
45°
30
57°
43°
1
48°
39°
2
50°
38°
3
64°
34°
4
77°
50°
5
66°
47°
6
57°
45°
7
59°
37°
8
62°
44°
9
73°
50°
10
64°
46°
11
58°
39°
12
66°
40°
13
N/A
14
64°
43°
15
67°
54°
16
76°
62°
17
77°
64°
18
85°
66°
19
77°
59°
20
68°
49°
21
66°
52°
22
68°
53°
23
69°
53°
24
70°
55°
25
73°
58°
26
77°
54°
27
71°
59°
28
76°
61°
29
78°
60°
30
76°
56°
31
69°
53°
1
71°
52°
2
70°
52°
3
71°
54°
4
72°
59°
5
80°
63°
6
82°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Oregon
Oregon's May 2026 forecast shows daily high temperatures ranging from 64° to 85°, with overnight lows between 43° and 66°. The average high for May is 73° 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 May weather will actually feel in Oregon. See also: June | July | August.
