S
M
T
W
T
F
S
26
62°
44°
27
64°
47°
28
67°
46°
29
61°
48°
30
62°
47°
1
63°
42°
2
62°
43°
3
68°
50°
4
74°
55°
5
74°
57°
6
76°
55°
7
73°
52°
8
69°
54°
9
65°
51°
10
67°
47°
11
66°
46°
12
65°
45°
13
66°
52°
14
70°
53°
15
67°
48°
16
70°
58°
17
79°
52°
18
68°
49°
19
68°
49°
20
70°
55°
21
75°
60°
22
78°
59°
23
70°
56°
24
71°
59°
25
80°
63°
26
81°
60°
27
78°
55°
28
73°
57°
29
83°
60°
30
83°
62°
31
81°
61°
1
82°
62°
2
84°
57°
3
83°
58°
4
82°
59°
5
80°
59°
6
81°
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 61° to 84°, with overnight lows between 42° and 63°. The average high for May is 72° 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.
