S
M
T
W
T
F
S
26
84°
64°
27
86°
64°
28
84°
63°
29
82°
61°
30
82°
61°
1
82°
66°
2
86°
34°
3
82°
66°
4
82°
64°
5
84°
64°
6
84°
66°
7
84°
64°
8
86°
68°
9
82°
66°
10
82°
68°
11
84°
64°
12
82°
63°
13
82°
63°
14
84°
61°
15
96°
64°
16
98°
67°
17
96°
69°
18
94°
67°
19
95°
68°
20
94°
68°
21
95°
70°
22
91°
70°
23
93°
69°
24
90°
70°
25
89°
69°
26
89°
69°
27
88°
70°
28
86°
70°
29
86°
72°
30
87°
71°
31
86°
71°
1
86°
70°
2
85°
71°
3
85°
71°
4
86°
70°
5
88°
72°
6
88°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Guastatoya
Guastatoya's May 2026 forecast shows daily high temperatures ranging from 85° to 98°, with overnight lows between 64° and 72°. The average high for May is 90° with an average low of 70°. 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 Guastatoya. See also: June | July | August.
