S
M
T
W
T
F
S
26
76°
50°
27
79°
53°
28
78°
49°
29
76°
50°
30
79°
52°
31
74°
48°
1
73°
47°
2
78°
50°
3
79°
51°
4
79°
52°
5
78°
52°
6
78°
51°
7
79°
53°
8
80°
55°
9
80°
56°
10
71°
47°
11
70°
45°
12
71°
45°
13
72°
47°
14
73°
49°
15
72°
46°
16
74°
54°
17
79°
55°
18
80°
54°
19
81°
52°
20
81°
48°
21
80°
46°
22
79°
46°
23
73°
53°
24
78°
53°
25
79°
49°
26
80°
48°
27
79°
49°
28
79°
45°
29
74°
45°
30
71°
47°
31
78°
44°
1
70°
44°
2
71°
45°
3
69°
52°
4
74°
51°
5
77°
50°
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 69° to 81°, with overnight lows between 44° and 56°. The average high for August is 76° with an average low of 49°. 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.
