S
M
T
W
T
F
S
26
59°
44°
27
72°
38°
28
63°
43°
29
62°
49°
30
68°
48°
1
66°
42°
2
64°
48°
3
63°
44°
4
74°
47°
5
84°
57°
6
72°
60°
7
66°
47°
8
68°
52°
9
65°
49°
10
78°
56°
11
61°
45°
12
62°
47°
13
63°
51°
14
65°
52°
15
69°
53°
16
72°
53°
17
71°
55°
18
77°
57°
19
77°
58°
20
74°
55°
21
69°
51°
22
68°
52°
23
69°
52°
24
70°
53°
25
73°
57°
26
77°
58°
27
73°
57°
28
75°
56°
29
73°
53°
30
77°
60°
31
80°
62°
1
79°
62°
2
78°
60°
3
79°
62°
4
82°
63°
5
82°
63°
6
81°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Salem
Salem's May 2026 forecast shows daily high temperatures ranging from 61° to 82°, with overnight lows between 45° and 64°. The average high for May is 73° with an average low of 55°. 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 Salem. See also: June | July | August.