S
M
T
W
T
F
S
30
100°
78°
31
100°
80°
1
99°
77°
2
100°
80°
3
100°
82°
4
99°
81°
5
98°
80°
6
99°
79°
7
100°
79°
8
100°
81°
9
98°
74°
10
100°
79°
11
99°
80°
12
98°
82°
13
98°
82°
14
98°
80°
15
101°
77°
16
97°
77°
17
92°
75°
18
90°
74°
19
95°
74°
20
98°
75°
21
94°
74°
22
93°
75°
23
94°
74°
24
93°
74°
25
92°
73°
26
93°
74°
27
92°
74°
28
89°
74°
29
91°
74°
30
91°
73°
1
90°
73°
2
89°
72°
3
90°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Donna
Donna's September 2026 forecast shows daily high temperatures ranging from 89° to 101°, with overnight lows between 72° and 80°. The average high for September is 93° with an average low of 74°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Donna. See also: October | November | December.
