S
M
T
W
T
F
S
26
88°
52°
27
91°
51°
28
90°
58°
29
89°
60°
30
93°
56°
31
100°
51°
1
88°
57°
2
79°
48°
3
83°
47°
4
88°
48°
5
94°
54°
6
101°
59°
7
99°
59°
8
91°
54°
9
89°
51°
10
84°
52°
11
89°
53°
12
90°
54°
13
90°
55°
14
89°
54°
15
90°
55°
16
86°
53°
17
86°
58°
18
90°
59°
19
91°
59°
20
89°
58°
21
84°
57°
22
84°
57°
23
86°
56°
24
80°
54°
25
79°
54°
26
88°
56°
27
89°
58°
28
88°
57°
29
87°
57°
30
82°
55°
31
84°
55°
1
77°
49°
2
75°
49°
3
76°
53°
4
82°
54°
5
81°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in La Grande
La Grande's August 2026 forecast shows daily high temperatures ranging from 75° to 101°, with overnight lows between 47° and 59°. The average high for August is 87° with an average low of 55°. 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 La Grande. See also: September | October | November.
