S
M
T
W
T
F
S
30
105°
81°
31
103°
78°
1
104°
81°
2
104°
81°
3
103°
81°
4
103°
80°
5
101°
81°
6
99°
81°
7
102°
79°
8
101°
78°
9
98°
79°
10
99°
80°
11
95°
77°
12
89°
76°
13
88°
76°
14
91°
78°
15
91°
78°
16
92°
75°
17
95°
75°
18
94°
77°
19
92°
77°
20
93°
76°
21
93°
77°
22
92°
77°
23
90°
76°
24
89°
76°
25
90°
75°
26
89°
76°
27
87°
75°
28
88°
76°
29
89°
73°
30
88°
73°
1
88°
74°
2
88°
74°
3
89°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mcallen-Pharr
Mcallen-Pharr's September 2026 forecast shows daily high temperatures ranging from 87° to 104°, with overnight lows between 73° and 81°. The average high for September is 94° 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 September weather will actually feel in Mcallen-Pharr. See also: October | November | December.
