S
M
T
W
T
F
S
26
89°
70°
27
90°
71°
28
89°
70°
29
87°
70°
30
87°
69°
31
89°
71°
1
90°
70°
2
89°
71°
3
90°
68°
4
89°
70°
5
89°
68°
6
84°
69°
7
86°
64°
8
85°
63°
9
84°
64°
10
84°
64°
11
87°
69°
12
89°
69°
13
90°
68°
14
89°
63°
15
86°
63°
16
84°
68°
17
84°
68°
18
87°
63°
19
84°
62°
20
83°
62°
21
84°
63°
22
85°
62°
23
85°
62°
24
86°
61°
25
86°
63°
26
87°
66°
27
88°
67°
28
89°
68°
29
89°
68°
30
88°
66°
31
87°
60°
1
83°
58°
2
80°
60°
3
81°
60°
4
82°
60°
5
83°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Upper Marlboro
Upper Marlboro's August 2026 forecast shows daily high temperatures ranging from 80° to 90°, with overnight lows between 58° and 71°. The average high for August is 86° with an average low of 65°. 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 Upper Marlboro. See also: September | October | November.
