S
M
T
W
T
F
S
26
80°
66°
27
82°
66°
28
81°
65°
29
82°
67°
30
83°
66°
31
80°
66°
1
77°
64°
2
75°
63°
3
75°
62°
4
77°
65°
5
77°
65°
6
79°
64°
7
79°
64°
8
82°
65°
9
82°
66°
10
81°
65°
11
81°
65°
12
82°
64°
13
81°
64°
14
83°
64°
15
84°
64°
16
81°
63°
17
80°
62°
18
78°
63°
19
81°
58°
20
80°
55°
21
74°
54°
22
73°
55°
23
75°
56°
24
77°
55°
25
74°
55°
26
74°
60°
27
75°
55°
28
77°
54°
29
73°
54°
30
72°
55°
31
72°
53°
1
71°
56°
2
73°
54°
3
72°
54°
4
74°
55°
5
74°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Farnham
Farnham's August 2026 forecast shows daily high temperatures ranging from 71° to 84°, with overnight lows between 52° and 67°. The average high for August is 78° with an average low of 60°. 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 Farnham. See also: September | October | November.