S
M
T
W
T
F
S
26
59°
52°
27
55°
41°
28
57°
42°
29
56°
41°
30
55°
41°
1
58°
45°
2
61°
47°
3
54°
44°
4
53°
43°
5
53°
43°
6
55°
44°
7
57°
44°
8
57°
46°
9
56°
45°
10
57°
45°
11
56°
43°
12
53°
42°
13
52°
44°
14
56°
44°
15
55°
41°
16
51°
42°
17
52°
43°
18
53°
43°
19
54°
42°
20
55°
43°
21
55°
43°
22
54°
42°
23
55°
43°
24
55°
42°
25
50°
42°
26
54°
43°
27
54°
43°
28
53°
42°
29
53°
41°
30
49°
41°
31
51°
40°
1
50°
39°
2
53°
39°
3
53°
38°
4
52°
38°
5
52°
37°
6
51°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Stewart Island
Stewart Island's May 2026 forecast shows daily high temperatures ranging from 49° to 61°, with overnight lows between 37° and 52°. The average high for May is 54° with an average low of 42°. 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 Stewart Island. See also: June | July | August.
