S
M
T
W
T
F
S
26
69°
37°
27
68°
38°
28
68°
42°
29
68°
40°
30
68°
42°
1
67°
42°
2
63°
41°
3
64°
41°
4
63°
40°
5
66°
41°
6
66°
42°
7
65°
41°
8
63°
42°
9
65°
41°
10
65°
42°
11
62°
42°
12
63°
41°
13
63°
40°
14
64°
41°
15
63°
41°
16
60°
40°
17
62°
40°
18
62°
37°
19
57°
33°
20
57°
33°
21
58°
36°
22
61°
35°
23
62°
38°
24
61°
36°
25
60°
38°
26
61°
37°
27
61°
37°
28
60°
38°
29
59°
35°
30
57°
35°
31
61°
37°
1
61°
32°
2
56°
35°
3
56°
35°
4
57°
34°
5
55°
30°
6
55°
33°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Blackheath
Blackheath's May 2026 forecast shows daily high temperatures ranging from 55° to 69°, with overnight lows between 30° and 42°. The average high for May is 62° with an average low of 38°. 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 Blackheath. See also: June | July | August.
