S
M
T
W
T
F
S
26
36°
19°
27
39°
23°
28
43°
18°
29
45°
27°
30
50°
18°
1
61°
18°
2
63°
21°
3
64°
25°
4
61°
27°
5
46°
25°
6
57°
14°
7
64°
34°
8
63°
27°
9
59°
28°
10
68°
25°
11
73°
32°
12
75°
27°
13
79°
30°
14
61°
39°
15
59°
27°
16
55°
30°
17
43°
23°
18
41°
19°
19
54°
12°
20
54°
23°
21
48°
25°
22
57°
18°
23
66°
30°
24
68°
27°
25
75°
32°
26
66°
32°
27
75°
30°
28
79°
32°
29
73°
30°
30
58°
44°
31
55°
37°
1
66°
37°
2
67°
32°
3
73°
38°
4
68°
42°
5
72°
44°
6
80°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Gardiner
Gardiner's May 2026 forecast shows daily high temperatures ranging from 55° to 80°, with overnight lows between 32° and 45°. The average high for May is 67° with an average low of 40°. 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 Gardiner. See also: June | July | August.