S
M
T
W
T
F
S
26
91°
72°
27
91°
72°
28
86°
66°
29
88°
64°
30
84°
70°
31
73°
64°
1
82°
61°
2
82°
57°
3
82°
66°
4
73°
55°
5
75°
54°
6
79°
50°
7
75°
63°
8
79°
54°
9
84°
66°
10
82°
64°
11
84°
70°
12
84°
68°
13
73°
62°
14
75°
66°
15
76°
65°
16
79°
54°
17
79°
60°
18
80°
62°
19
78°
61°
20
79°
63°
21
81°
63°
22
79°
58°
23
75°
58°
24
75°
55°
25
76°
58°
26
78°
57°
27
83°
61°
28
78°
59°
29
82°
62°
30
83°
63°
31
84°
63°
1
83°
62°
2
82°
62°
3
83°
61°
4
83°
62°
5
82°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Morristown
Morristown's August 2026 forecast shows daily high temperatures ranging from 73° to 84°, with overnight lows between 54° and 66°. 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 Morristown. See also: September | October | November.