S
M
T
W
T
F
S
26
92°
63°
27
93°
61°
28
93°
61°
29
91°
59°
30
92°
60°
31
93°
57°
1
91°
56°
2
92°
59°
3
92°
59°
4
93°
58°
5
93°
57°
6
91°
57°
7
91°
56°
8
90°
57°
9
91°
59°
10
92°
57°
11
92°
53°
12
90°
53°
13
87°
54°
14
90°
55°
15
89°
51°
16
86°
56°
17
89°
57°
18
90°
58°
19
89°
56°
20
93°
59°
21
91°
57°
22
81°
54°
23
81°
56°
24
84°
52°
25
84°
49°
26
80°
48°
27
79°
47°
28
78°
46°
29
78°
50°
30
82°
51°
31
81°
49°
1
80°
47°
2
77°
53°
3
78°
50°
4
75°
47°
5
73°
46°
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 73° to 93°, with overnight lows between 46° and 63°. 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.
