S
M
T
W
T
F
S
26
66°
47°
27
77°
49°
28
72°
58°
29
64°
47°
30
57°
42°
1
52°
41°
2
51°
35°
3
60°
33°
4
73°
47°
5
68°
48°
6
58°
44°
7
59°
42°
8
67°
42°
9
73°
53°
10
67°
54°
11
70°
42°
12
73°
41°
13
67°
47°
14
63°
44°
15
70°
57°
16
75°
62°
17
87°
65°
18
86°
68°
19
76°
63°
20
73°
54°
21
68°
53°
22
70°
55°
23
74°
57°
24
76°
59°
25
77°
61°
26
79°
62°
27
77°
56°
28
77°
62°
29
76°
61°
30
77°
56°
31
71°
55°
1
72°
53°
2
71°
53°
3
72°
54°
4
73°
55°
5
80°
63°
6
82°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Oregonia
Oregonia's May 2026 forecast shows daily high temperatures ranging from 63° to 87°, with overnight lows between 44° and 68°. The average high for May is 75° with an average low of 58°. 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 Oregonia. See also: June | July | August.