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
105°
80°
2
104°
80°
3
104°
81°
4
103°
82°
5
103°
80°
6
100°
81°
7
101°
80°
8
100°
81°
9
101°
82°
10
102°
82°
11
101°
81°
12
102°
80°
13
100°
81°
14
101°
80°
15
101°
79°
16
100°
81°
17
99°
81°
18
98°
81°
19
99°
79°
20
100°
79°
21
100°
80°
22
99°
80°
23
100°
79°
24
100°
80°
25
99°
80°
26
99°
81°
27
98°
80°
28
99°
80°
29
98°
79°
30
99°
80°
31
99°
79°
1
98°
80°
2
98°
80°
3
97°
79°
4
98°
79°
5
98°
78°
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 97° to 105°, with overnight lows between 78° and 82°. The average high for August is 100° 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.
