S
M
T
W
T
F
S
26
59°
42°
27
73°
38°
28
72°
51°
29
63°
46°
30
51°
36°
1
51°
31°
2
45°
31°
3
59°
27°
4
73°
45°
5
73°
57°
6
57°
45°
7
60°
35°
8
63°
39°
9
67°
47°
10
63°
43°
11
62°
34°
12
68°
35°
13
70°
47°
14
51°
42°
15
65°
48°
16
74°
62°
17
78°
61°
18
88°
63°
19
82°
59°
20
69°
48°
21
65°
47°
22
67°
47°
23
67°
49°
24
65°
51°
25
70°
53°
26
71°
48°
27
70°
54°
28
71°
53°
29
72°
54°
30
73°
53°
31
67°
50°
1
67°
45°
2
68°
45°
3
66°
46°
4
68°
47°
5
74°
55°
6
77°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Slippery Rock
Slippery Rock's May 2026 forecast shows daily high temperatures ranging from 51° to 88°, with overnight lows between 42° and 63°. The average high for May is 70° 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 Slippery Rock. See also: June | July | August.