S
M
T
W
T
F
S
26
58°
37°
27
64°
34°
28
55°
36°
29
51°
44°
30
54°
44°
1
62°
44°
2
57°
41°
3
54°
39°
4
72°
41°
5
80°
51°
6
70°
57°
7
64°
45°
8
61°
37°
9
53°
36°
10
70°
50°
11
61°
39°
12
62°
38°
13
63°
38°
14
59°
50°
15
54°
45°
16
78°
45°
17
87°
56°
18
69°
54°
19
94°
54°
20
87°
57°
21
61°
45°
22
62°
49°
23
56°
50°
24
54°
48°
25
61°
53°
26
67°
52°
27
71°
54°
28
68°
51°
29
71°
54°
30
73°
53°
31
70°
55°
1
73°
53°
2
76°
51°
3
71°
54°
4
74°
55°
5
74°
55°
6
73°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in South Salem
South Salem's May 2026 forecast shows daily high temperatures ranging from 54° to 87°, with overnight lows between 45° and 57°. The average high for May is 69° with an average low of 52°. 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 South Salem. See also: June | July | August.