S
M
T
W
T
F
S
26
111°
90°
27
113°
93°
28
106°
90°
29
110°
92°
30
113°
94°
31
116°
94°
1
116°
93°
2
116°
96°
3
116°
96°
4
107°
91°
5
105°
91°
6
105°
89°
7
112°
88°
8
112°
94°
9
112°
78°
10
108°
84°
11
104°
80°
12
96°
74°
13
94°
77°
14
95°
78°
15
100°
81°
16
103°
81°
17
108°
83°
18
111°
83°
19
110°
78°
20
107°
83°
21
102°
78°
22
104°
79°
23
104°
80°
24
106°
79°
25
102°
74°
26
97°
72°
27
98°
75°
28
103°
78°
29
102°
78°
30
100°
77°
31
101°
77°
1
103°
75°
2
100°
75°
3
100°
76°
4
102°
77°
5
103°
77°
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 94° to 111°, with overnight lows between 72° and 83°. The average high for August is 102° with an average low of 78°. 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.