S
M
T
W
T
F
S
26
78°
58°
27
76°
57°
28
75°
57°
29
71°
54°
30
72°
58°
31
72°
58°
1
75°
57°
2
74°
57°
3
75°
58°
4
73°
57°
5
75°
58°
6
75°
58°
7
74°
57°
8
75°
58°
9
76°
58°
10
76°
57°
11
75°
58°
12
77°
59°
13
76°
58°
14
75°
57°
15
75°
57°
16
72°
56°
17
75°
56°
18
74°
56°
19
74°
55°
20
73°
55°
21
74°
56°
22
74°
56°
23
73°
55°
24
74°
55°
25
74°
54°
26
70°
53°
27
69°
51°
28
68°
55°
29
69°
53°
30
68°
52°
31
68°
54°
1
69°
55°
2
71°
53°
3
69°
50°
4
67°
53°
5
67°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Keynsham
Keynsham's August 2026 forecast shows daily high temperatures ranging from 67° to 78°, with overnight lows between 50° and 59°. The average high for August is 73° with an average low of 56°. 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 Keynsham. See also: September | October | November.