S
M
T
W
T
F
S
26
94°
74°
27
95°
77°
28
98°
77°
29
97°
76°
30
96°
75°
31
96°
77°
1
97°
77°
2
98°
76°
3
96°
76°
4
98°
77°
5
98°
78°
6
100°
77°
7
96°
77°
8
96°
76°
9
97°
75°
10
96°
76°
11
98°
77°
12
97°
76°
13
96°
77°
14
97°
78°
15
98°
79°
16
98°
78°
17
97°
77°
18
96°
78°
19
98°
79°
20
99°
79°
21
99°
78°
22
98°
78°
23
98°
77°
24
96°
77°
25
97°
74°
26
93°
75°
27
93°
76°
28
94°
78°
29
94°
77°
30
95°
76°
31
96°
77°
1
95°
76°
2
95°
77°
3
96°
75°
4
96°
75°
5
95°
75°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Donna
Donna's August 2026 forecast shows daily high temperatures ranging from 93° to 100°, with overnight lows between 74° and 79°. The average high for August is 96° with an average low of 77°. 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 Donna. See also: September | October | November.