S
M
T
W
T
F
S
26
90°
68°
27
89°
67°
28
87°
64°
29
85°
64°
30
87°
68°
31
86°
66°
1
86°
67°
2
88°
66°
3
92°
69°
4
93°
68°
5
92°
68°
6
91°
70°
7
93°
70°
8
92°
68°
9
93°
67°
10
92°
69°
11
93°
69°
12
94°
68°
13
93°
69°
14
93°
69°
15
91°
68°
16
91°
66°
17
89°
65°
18
88°
64°
19
87°
65°
20
86°
63°
21
85°
63°
22
87°
64°
23
87°
64°
24
88°
69°
25
90°
70°
26
93°
68°
27
91°
68°
28
92°
67°
29
93°
67°
30
92°
68°
31
91°
68°
1
88°
67°
2
90°
66°
3
92°
66°
4
91°
67°
5
92°
68°
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 85° to 94°, with overnight lows between 63° and 70°. The average high for August is 90° with an average low of 67°. 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.
