S
M
T
W
T
F
S
26
76°
55°
27
77°
53°
28
78°
58°
29
78°
58°
30
77°
56°
31
78°
54°
1
77°
52°
2
75°
52°
3
76°
54°
4
78°
57°
5
79°
58°
6
78°
57°
7
78°
55°
8
77°
54°
9
78°
58°
10
78°
56°
11
79°
57°
12
79°
57°
13
78°
56°
14
79°
57°
15
79°
57°
16
78°
55°
17
78°
55°
18
79°
54°
19
78°
50°
20
73°
50°
21
73°
49°
22
74°
48°
23
73°
52°
24
72°
50°
25
72°
50°
26
73°
53°
27
72°
55°
28
72°
49°
29
71°
50°
30
72°
49°
31
71°
48°
1
72°
49°
2
74°
52°
3
74°
53°
4
72°
48°
5
71°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Grain
Grain's August 2026 forecast shows daily high temperatures ranging from 71° to 79°, with overnight lows between 47° and 58°. The average high for August is 76° with an average low of 53°. 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 Grain. See also: September | October | November.