S
M
T
W
T
F
S
26
94°
64°
27
92°
64°
28
90°
60°
29
85°
59°
30
91°
62°
31
93°
60°
1
95°
58°
2
92°
58°
3
88°
62°
4
87°
61°
5
85°
62°
6
90°
61°
7
92°
60°
8
95°
63°
9
95°
64°
10
93°
63°
11
89°
65°
12
87°
64°
13
84°
63°
14
84°
62°
15
88°
59°
16
91°
61°
17
92°
63°
18
94°
61°
19
95°
62°
20
96°
64°
21
95°
62°
22
94°
61°
23
93°
60°
24
93°
61°
25
95°
60°
26
95°
61°
27
93°
62°
28
94°
58°
29
91°
63°
30
90°
62°
31
87°
62°
1
87°
62°
2
88°
61°
3
88°
62°
4
90°
63°
5
92°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Fillmore
Fillmore's August 2026 forecast shows daily high temperatures ranging from 87° to 96°, with overnight lows between 58° and 64°. The average high for August is 92° with an average low of 61°. 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 Fillmore. See also: September | October | November.