S
M
T
W
T
F
S
26
77°
56°
27
81°
57°
28
74°
53°
29
78°
52°
30
80°
53°
31
82°
56°
1
78°
55°
2
80°
54°
3
82°
58°
4
84°
57°
5
87°
59°
6
83°
55°
7
79°
57°
8
91°
59°
9
76°
55°
10
80°
53°
11
83°
56°
12
83°
57°
13
85°
57°
14
79°
51°
15
77°
51°
16
81°
52°
17
82°
54°
18
78°
52°
19
82°
54°
20
83°
53°
21
82°
51°
22
75°
50°
23
81°
49°
24
79°
51°
25
82°
54°
26
75°
51°
27
78°
51°
28
81°
53°
29
82°
56°
30
80°
55°
31
78°
55°
1
82°
54°
2
81°
55°
3
79°
53°
4
77°
51°
5
74°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Rainier
Rainier's August 2026 forecast shows daily high temperatures ranging from 74° to 91°, with overnight lows between 49° and 59°. The average high for August is 80° with an average low of 54°. 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 Rainier. See also: September | October | November.
