S
M
T
W
T
F
S
26
88°
75°
27
92°
76°
28
93°
76°
29
89°
65°
30
79°
64°
1
67°
56°
2
75°
51°
3
81°
53°
4
84°
60°
5
87°
69°
6
88°
64°
7
73°
62°
8
79°
64°
9
91°
73°
10
92°
67°
11
82°
65°
12
86°
62°
13
89°
62°
14
91°
64°
15
91°
70°
16
90°
68°
17
90°
76°
18
92°
78°
19
91°
67°
20
87°
68°
21
82°
68°
22
90°
66°
23
83°
67°
24
88°
67°
25
89°
68°
26
90°
70°
27
84°
70°
28
89°
68°
29
91°
70°
30
89°
71°
31
89°
68°
1
84°
67°
2
82°
66°
3
85°
63°
4
86°
65°
5
88°
67°
6
88°
68°
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 82° to 91°, with overnight lows between 63° and 71°. The average high for May is 87° with an average low of 68°. 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.