S
M
T
W
T
F
S
26
74°
59°
27
79°
59°
28
73°
58°
29
75°
56°
30
79°
54°
31
84°
56°
1
74°
55°
2
71°
51°
3
79°
55°
4
87°
57°
5
90°
56°
6
83°
56°
7
81°
54°
8
80°
55°
9
81°
56°
10
78°
55°
11
78°
55°
12
78°
54°
13
79°
56°
14
77°
53°
15
79°
54°
16
73°
53°
17
77°
55°
18
78°
56°
19
79°
54°
20
76°
53°
21
73°
55°
22
71°
51°
23
74°
55°
24
70°
48°
25
75°
53°
26
78°
56°
27
78°
56°
28
77°
55°
29
72°
53°
30
69°
47°
31
72°
52°
1
68°
51°
2
68°
48°
3
69°
46°
4
71°
52°
5
68°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Fall City
Fall City's August 2026 forecast shows daily high temperatures ranging from 68° to 90°, with overnight lows between 46° and 57°. The average high for August is 76° with an average low of 53°. 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 Fall City. See also: September | October | November.