S
M
T
W
T
F
S
30
89°
68°
31
86°
64°
1
83°
64°
2
82°
65°
3
83°
67°
4
86°
69°
5
88°
67°
6
88°
67°
7
87°
66°
8
84°
63°
9
82°
61°
10
81°
62°
11
82°
61°
12
81°
60°
13
80°
61°
14
79°
60°
15
80°
61°
16
80°
60°
17
83°
61°
18
82°
61°
19
84°
65°
20
84°
60°
21
83°
57°
22
Hist. Avg.
80°
58°
23
Hist. Avg.
80°
58°
24
Hist. Avg.
80°
57°
25
Hist. Avg.
79°
57°
26
Hist. Avg.
79°
56°
27
Hist. Avg.
79°
56°
28
Hist. Avg.
78°
56°
29
Hist. Avg.
78°
55°
30
Hist. Avg.
78°
55°
1
Hist. Avg.
77°
54°
2
Hist. Avg.
77°
54°
3
Hist. Avg.
77°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Diaz
Diaz's September 2026 forecast shows daily high temperatures ranging from 79° to 89°, with overnight lows between 57° and 69°. The average high for September is 83° with an average low of 63°. 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 Diaz. See also: October | November | December.
