S
M
T
W
T
F
S
26
84°
67°
27
84°
67°
28
83°
66°
29
83°
65°
30
81°
63°
31
74°
59°
1
73°
58°
2
74°
57°
3
74°
59°
4
76°
64°
5
77°
63°
6
78°
64°
7
76°
64°
8
76°
62°
9
75°
60°
10
76°
56°
11
75°
55°
12
79°
64°
13
80°
65°
14
84°
64°
15
82°
62°
16
77°
65°
17
82°
62°
18
80°
61°
19
77°
55°
20
73°
53°
21
73°
53°
22
74°
54°
23
76°
54°
24
78°
55°
25
79°
54°
26
80°
58°
27
81°
61°
28
81°
59°
29
79°
59°
30
80°
60°
31
79°
54°
1
79°
49°
2
71°
50°
3
70°
54°
4
75°
59°
5
77°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Fairfield
Fairfield's August 2026 forecast shows daily high temperatures ranging from 70° to 84°, with overnight lows between 49° and 67°. The average high for August is 78° with an average low of 59°. 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 Fairfield. See also: September | October | November.
