S
M
T
W
T
F
S
26
69°
42°
27
69°
51°
28
63°
48°
29
53°
35°
30
53°
31°
1
50°
31°
2
60°
28°
3
70°
46°
4
79°
40°
5
57°
36°
6
54°
32°
7
61°
30°
8
69°
34°
9
68°
44°
10
63°
33°
11
61°
33°
12
77°
42°
13
64°
41°
14
71°
33°
15
80°
61°
16
85°
59°
17
84°
67°
18
79°
65°
19
71°
45°
20
62°
44°
21
64°
47°
22
73°
52°
23
74°
54°
24
73°
55°
25
72°
56°
26
72°
57°
27
73°
57°
28
74°
51°
29
69°
54°
30
68°
52°
31
68°
50°
1
69°
48°
2
68°
48°
3
69°
51°
4
71°
58°
5
79°
60°
6
79°
60°
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 62° to 85°, with overnight lows between 44° and 67°. The average high for May is 73° with an average low of 54°. 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.
