S
M
T
W
T
F
S
26
84°
52°
27
86°
59°
28
80°
61°
29
85°
56°
30
87°
60°
31
93°
60°
1
78°
57°
2
71°
53°
3
78°
46°
4
84°
43°
5
90°
46°
6
96°
48°
7
96°
55°
8
90°
61°
9
88°
63°
10
87°
62°
11
88°
63°
12
85°
60°
13
85°
56°
14
88°
58°
15
93°
60°
16
90°
59°
17
91°
58°
18
92°
60°
19
88°
61°
20
89°
59°
21
98°
63°
22
82°
54°
23
86°
58°
24
89°
59°
25
90°
59°
26
89°
60°
27
88°
58°
28
88°
56°
29
87°
56°
30
81°
54°
31
83°
56°
1
85°
57°
2
77°
54°
3
82°
56°
4
86°
55°
5
85°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Ellensburg
Ellensburg's August 2026 forecast shows daily high temperatures ranging from 77° to 98°, with overnight lows between 54° and 63°. The average high for August is 87° with an average low of 58°. 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 Ellensburg. See also: September | October | November.
