S
M
T
W
T
F
S
26
100°
74°
27
101°
73°
28
100°
79°
29
101°
79°
30
100°
77°
31
101°
76°
1
102°
77°
2
102°
75°
3
100°
73°
4
101°
78°
5
102°
81°
6
101°
78°
7
100°
75°
8
98°
74°
9
98°
75°
10
102°
76°
11
102°
78°
12
101°
78°
13
101°
81°
14
101°
80°
15
101°
80°
16
98°
76°
17
97°
75°
18
101°
75°
19
101°
78°
20
99°
79°
21
101°
78°
22
100°
77°
23
102°
76°
24
98°
75°
25
99°
75°
26
95°
76°
27
96°
77°
28
97°
77°
29
93°
75°
30
97°
76°
31
97°
77°
1
97°
77°
2
96°
76°
3
97°
77°
4
94°
75°
5
94°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Harlingen
Harlingen's August 2026 forecast shows daily high temperatures ranging from 93° to 102°, with overnight lows between 72° and 79°. The average high for August is 98° with an average low of 76°. 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 Harlingen. See also: September | October | November.
