S
M
T
W
T
F
S
26
86°
70°
27
87°
70°
28
87°
71°
29
88°
70°
30
87°
70°
31
86°
69°
1
82°
69°
2
84°
67°
3
83°
69°
4
87°
70°
5
88°
71°
6
87°
70°
7
82°
68°
8
86°
68°
9
85°
67°
10
86°
61°
11
80°
63°
12
81°
62°
13
81°
62°
14
84°
63°
15
80°
64°
16
79°
67°
17
80°
67°
18
83°
65°
19
80°
65°
20
79°
63°
21
79°
66°
22
80°
66°
23
79°
63°
24
82°
65°
25
84°
61°
26
85°
59°
27
78°
60°
28
78°
61°
29
79°
63°
30
77°
64°
31
80°
65°
1
82°
60°
2
77°
59°
3
76°
58°
4
76°
57°
5
77°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Monrovia
Monrovia's August 2026 forecast shows daily high temperatures ranging from 76° to 88°, with overnight lows between 57° and 71°. The average high for August is 82° 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 Monrovia. See also: September | October | November.
