S
M
T
W
T
F
S
26
95°
60°
27
94°
59°
28
95°
60°
29
95°
60°
30
96°
59°
31
96°
59°
1
95°
57°
2
92°
55°
3
89°
57°
4
91°
54°
5
92°
57°
6
91°
57°
7
Hist. Avg.
94°
61°
8
Hist. Avg.
94°
61°
9
Hist. Avg.
94°
61°
10
Hist. Avg.
94°
61°
11
Hist. Avg.
94°
61°
12
Hist. Avg.
94°
61°
13
Hist. Avg.
94°
61°
14
Hist. Avg.
94°
61°
15
Hist. Avg.
94°
61°
16
Hist. Avg.
94°
61°
17
Hist. Avg.
94°
61°
18
Hist. Avg.
93°
61°
19
Hist. Avg.
93°
61°
20
Hist. Avg.
93°
61°
21
Hist. Avg.
93°
61°
22
Hist. Avg.
93°
61°
23
Hist. Avg.
93°
61°
24
Hist. Avg.
93°
61°
25
Hist. Avg.
93°
61°
26
Hist. Avg.
93°
61°
27
Hist. Avg.
93°
61°
28
Hist. Avg.
93°
60°
29
Hist. Avg.
92°
60°
30
Hist. Avg.
92°
60°
31
Hist. Avg.
92°
60°
1
Hist. Avg.
92°
60°
2
Hist. Avg.
92°
60°
3
Hist. Avg.
92°
60°
4
Hist. Avg.
92°
60°
5
Hist. Avg.
92°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Fallbrook
Fallbrook's August 2026 forecast shows daily high temperatures ranging from 89° to 96°, with overnight lows between 54° and 60°. The average high for August is 93° with an average low of 58°. 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 Fallbrook. See also: September | October | November.
