S
M
T
W
T
F
S
26
90°
71°
27
90°
70°
28
88°
69°
29
87°
70°
30
88°
66°
31
83°
64°
1
82°
64°
2
83°
67°
3
84°
69°
4
83°
67°
5
84°
65°
6
86°
69°
7
89°
70°
8
87°
69°
9
86°
68°
10
86°
63°
11
85°
62°
12
85°
63°
13
84°
68°
14
89°
69°
15
88°
68°
16
90°
70°
17
91°
69°
18
90°
67°
19
88°
62°
20
83°
62°
21
82°
63°
22
82°
61°
23
83°
61°
24
82°
62°
25
83°
61°
26
83°
61°
27
84°
62°
28
83°
61°
29
84°
61°
30
81°
62°
31
84°
64°
1
87°
59°
2
86°
58°
3
80°
59°
4
81°
60°
5
81°
65°
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 91°, with overnight lows between 58° and 71°. The average high for August is 85° 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.
