S
M
T
W
T
F
S
26
66°
52°
27
63°
50°
28
64°
48°
29
63°
48°
30
64°
49°
1
64°
47°
2
66°
47°
3
64°
48°
4
64°
45°
5
63°
45°
6
65°
46°
7
66°
51°
8
75°
51°
9
69°
54°
10
66°
49°
11
67°
47°
12
65°
46°
13
64°
47°
14
66°
48°
15
66°
49°
16
67°
48°
17
68°
54°
18
75°
52°
19
69°
49°
20
68°
50°
21
70°
56°
22
69°
57°
23
71°
59°
24
78°
60°
25
79°
60°
26
79°
61°
27
80°
62°
28
81°
60°
29
80°
60°
30
82°
60°
31
81°
57°
1
74°
54°
2
72°
58°
3
74°
62°
4
75°
62°
5
75°
61°
6
79°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Blenheim
Blenheim's May 2026 forecast shows daily high temperatures ranging from 63° to 82°, with overnight lows between 45° and 62°. The average high for May is 70° with an average low of 53°. 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 Blenheim. See also: June | July | August.
