S
M
T
W
T
F
S
30
87°
69°
31
88°
69°
1
93°
73°
2
93°
74°
3
98°
74°
4
91°
70°
5
83°
64°
6
81°
63°
7
81°
64°
8
80°
61°
9
77°
64°
10
84°
64°
11
82°
62°
12
80°
63°
13
80°
61°
14
79°
60°
15
75°
64°
16
73°
64°
17
73°
60°
18
72°
55°
19
71°
56°
20
72°
58°
21
75°
59°
22
78°
62°
23
79°
63°
24
79°
61°
25
78°
61°
26
76°
60°
27
77°
61°
28
77°
60°
29
78°
60°
30
73°
58°
1
69°
54°
2
70°
58°
3
74°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in La Plata
La Plata's September 2026 forecast shows daily high temperatures ranging from 69° to 98°, with overnight lows between 54° and 74°. The average high for September is 79° with an average low of 62°. 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 La Plata. See also: October | November | December.
