S
M
T
W
T
F
S
26
86°
77°
27
91°
77°
28
91°
78°
29
92°
76°
30
89°
75°
1
77°
61°
2
78°
58°
3
83°
56°
4
83°
62°
5
90°
72°
6
89°
77°
7
80°
69°
8
90°
67°
9
92°
71°
10
89°
71°
11
85°
67°
12
89°
65°
13
90°
63°
14
91°
62°
15
91°
67°
16
91°
69°
17
91°
79°
18
94°
79°
19
88°
70°
20
87°
67°
21
83°
69°
22
88°
72°
23
82°
70°
24
88°
71°
25
88°
72°
26
88°
75°
27
82°
72°
28
89°
74°
29
94°
76°
30
90°
75°
31
87°
74°
1
88°
71°
2
87°
71°
3
88°
74°
4
89°
73°
5
90°
75°
6
99°
76°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Calallen
Calallen's May 2026 forecast shows daily high temperatures ranging from 82° to 99°, with overnight lows between 71° and 76°. The average high for May is 89° with an average low of 74°. 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 Calallen. See also: June | July | August.