S
M
T
W
T
F
S
26
64°
45°
27
67°
43°
28
55°
37°
29
63°
40°
30
68°
47°
1
63°
44°
2
59°
43°
3
56°
42°
4
58°
42°
5
58°
44°
6
57°
43°
7
57°
42°
8
58°
43°
9
57°
44°
10
55°
43°
11
57°
42°
12
56°
42°
13
55°
44°
14
56°
47°
15
57°
47°
16
59°
46°
17
58°
44°
18
61°
48°
19
63°
49°
20
64°
49°
21
64°
50°
22
63°
50°
23
65°
48°
24
64°
49°
25
63°
50°
26
61°
49°
27
60°
48°
28
59°
47°
29
60°
48°
30
62°
50°
31
64°
50°
1
65°
51°
2
65°
51°
3
66°
50°
4
65°
50°
5
65°
49°
6
63°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Blackrock
Blackrock's May 2026 forecast shows daily high temperatures ranging from 55° to 68°, with overnight lows between 37° and 51°. The average high for May is 61° with an average low of 46°. 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 Blackrock. See also: June | July | August.