S
M
T
W
T
F
S
26
84°
55°
27
85°
62°
28
79°
64°
29
81°
66°
30
80°
64°
31
86°
63°
1
86°
63°
2
85°
71°
3
84°
62°
4
85°
58°
5
78°
71°
6
87°
70°
7
87°
70°
8
86°
66°
9
87°
65°
10
87°
69°
11
84°
63°
12
78°
61°
13
76°
60°
14
79°
61°
15
74°
60°
16
75°
61°
17
74°
60°
18
79°
57°
19
78°
63°
20
79°
60°
21
77°
56°
22
77°
61°
23
81°
63°
24
82°
63°
25
81°
62°
26
80°
62°
27
75°
61°
28
74°
62°
29
78°
60°
30
79°
61°
31
78°
60°
1
79°
56°
2
71°
53°
3
70°
52°
4
70°
52°
5
71°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Hackettstown
Hackettstown's August 2026 forecast shows daily high temperatures ranging from 70° to 87°, with overnight lows between 52° and 71°. The average high for August is 79° with an average low of 61°. 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 Hackettstown. See also: September | October | November.
