S
M
T
W
T
F
S
26
92°
77°
27
92°
77°
28
96°
80°
29
96°
76°
30
94°
78°
1
86°
67°
2
77°
62°
3
86°
62°
4
85°
66°
5
94°
77°
6
101°
81°
7
84°
73°
8
90°
72°
9
89°
77°
10
91°
76°
11
86°
72°
12
86°
69°
13
89°
68°
14
93°
74°
15
93°
79°
16
92°
78°
17
94°
77°
18
94°
78°
19
92°
77°
20
91°
76°
21
95°
78°
22
94°
75°
23
93°
77°
24
91°
76°
25
91°
76°
26
92°
77°
27
92°
78°
28
93°
78°
29
93°
77°
30
95°
79°
31
96°
79°
1
96°
78°
2
96°
79°
3
94°
78°
4
93°
79°
5
93°
78°
6
94°
77°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mcallen-Pharr
Mcallen-Pharr's May 2026 forecast shows daily high temperatures ranging from 86° to 96°, with overnight lows between 68° and 79°. The average high for May is 92° with an average low of 77°. 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 Mcallen-Pharr. See also: June | July | August.
