S
M
T
W
T
F
S
26
103°
78°
27
103°
79°
28
103°
81°
29
103°
82°
30
103°
82°
31
103°
83°
1
107°
83°
2
107°
74°
3
101°
77°
4
101°
83°
5
102°
84°
6
102°
82°
7
102°
80°
8
101°
80°
9
101°
79°
10
100°
80°
11
102°
81°
12
102°
81°
13
103°
83°
14
101°
83°
15
103°
84°
16
101°
81°
17
102°
79°
18
104°
78°
19
103°
78°
20
104°
82°
21
101°
83°
22
107°
80°
23
104°
78°
24
105°
78°
25
104°
79°
26
105°
78°
27
105°
79°
28
104°
79°
29
100°
79°
30
101°
80°
31
103°
81°
1
101°
80°
2
102°
81°
3
103°
79°
4
100°
80°
5
99°
81°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Mcallen-Pharr
Mcallen-Pharr's August 2026 forecast shows daily high temperatures ranging from 99° to 103°, with overnight lows between 79° and 81°. The average high for August is 101° with an average low of 80°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Mcallen-Pharr. See also: September | October | November.
