S
M
T
W
T
F
S
26
86°
68°
27
82°
67°
28
81°
67°
29
81°
64°
30
81°
64°
31
82°
63°
1
83°
65°
2
84°
66°
3
82°
66°
4
81°
64°
5
81°
65°
6
83°
65°
7
82°
68°
8
84°
69°
9
82°
67°
10
82°
67°
11
80°
66°
12
79°
68°
13
78°
67°
14
80°
68°
15
79°
68°
16
82°
67°
17
78°
66°
18
78°
67°
19
77°
66°
20
78°
66°
21
78°
67°
22
80°
67°
23
80°
68°
24
79°
68°
25
80°
67°
26
80°
67°
27
79°
68°
28
80°
68°
29
79°
67°
30
80°
68°
31
80°
68°
1
79°
67°
2
80°
67°
3
77°
66°
4
76°
67°
5
76°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Border
Border's August 2026 forecast shows daily high temperatures ranging from 76° to 84°, with overnight lows between 66° and 69°. The average high for August is 79° with an average low of 67°. 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 Border. See also: September | October | November.