S
M
T
W
T
F
S
26
62°
52°
27
64°
52°
28
64°
52°
29
65°
57°
30
59°
46°
1
62°
46°
2
62°
50°
3
64°
48°
4
65°
54°
5
63°
53°
6
64°
55°
7
66°
57°
8
66°
58°
9
63°
58°
10
59°
48°
11
56°
44°
12
57°
47°
13
55°
52°
14
57°
47°
15
56°
48°
16
54°
44°
17
55°
45°
18
55°
45°
19
60°
45°
20
61°
50°
21
62°
52°
22
64°
52°
23
57°
50°
24
57°
45°
25
64°
45°
26
57°
51°
27
61°
46°
28
N/A
29
61°
42°
30
66°
48°
31
68°
60°
1
68°
62°
2
66°
53°
3
63°
49°
4
64°
56°
5
64°
54°
6
61°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Wanganui
Wanganui's May 2026 forecast shows daily high temperatures ranging from 61° to 68°, with overnight lows between 42° and 62°. The average high for May is 65° 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 Wanganui. See also: June | July | August.