S
M
T
W
T
F
S
26
45°
28°
27
46°
39°
28
49°
39°
29
50°
39°
30
48°
39°
1
53°
40°
2
49°
42°
3
51°
40°
4
56°
40°
5
53°
43°
6
50°
33°
7
54°
33°
8
53°
36°
9
55°
35°
10
54°
36°
11
48°
36°
12
49°
34°
13
48°
35°
14
56°
33°
15
51°
31°
16
51°
31°
17
53°
32°
18
57°
33°
19
57°
36°
20
52°
36°
21
52°
34°
22
53°
34°
23
55°
39°
24
57°
37°
25
55°
36°
26
54°
36°
27
54°
37°
28
57°
36°
29
55°
36°
30
56°
37°
31
55°
37°
1
56°
36°
2
55°
36°
3
56°
37°
4
61°
38°
5
62°
40°
6
62°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Gustavus
Gustavus's May 2026 forecast shows daily high temperatures ranging from 48° to 62°, with overnight lows between 31° and 43°. The average high for May is 54° with an average low of 36°. 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 Gustavus. See also: June | July | August.
