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September Weather in La Plata, United States

Last updated: June 24, 2025

In September, the average temperature in La Plata, United States is a pleasant 21°C (70°F). This season brings a wide temperature range, where you might encounter cool lows of 5°C (41°F) and warm highs reaching 34°C (94°F). Expect approximately 87 mm (3.4 in) of precipitation over about 7 days, contributing to an average humidity of 72%. Enjoy the variety of weather as it unfolds!

September Temperature in La Plata

In September in La Plata, the average temperature is 21°C (70°F). Maximums can reach 34°C (94°F), while minimums can drop as low as 5°C (41°F). This range makes it an ideal time for travelers to enjoy a variety of outdoor activities, while also being prepared for potential temperature fluctuations.

September Weather in La Plata: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in La Plata, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In La Plata, September typically has an average temperature of 21°C (70°F), with highs reaching up to 34°C (94°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec283043526575797570554135
Data source: Temperature data for La Plata generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in La Plata

In La Plata in September, the precipitation amount is 87 mm (3.4 in) over a span of 7 days.

September Precipitation Trends in La Plata

The chart displays monthly precipitation patterns in La Plata, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In La Plata, September typically receives around 87 mm (3.4 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec5852111921751238690881185040
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in La Plata

In La Plata in September, humidity is 72%. With an average temperature of 21°C (70°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities a bit sticky and sweaty, but still manageable for traveling if you stay hydrated and take regular breaks in the shade.

September Average Humidity in La Plata

This chart illustrates the average monthly humidity levels in La Plata, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in La Plata is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%78%75%77%82%83%81%78%72%72%84%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in La Plata

In La Plata in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in La Plata.

Maximum UV Index Levels in La Plata for September

The chart shows the monthly maximum UV Index (UVI) for La Plata in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in La Plata typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109643
Data source: La Plata September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in La Plata Compares to Other Months

Weather in La Plata varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in La Plata, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in La Plata, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)58 mm (2.3 inches)80%moderate
February Weather-1°C (31°F)52 mm (2.0 inches)78%moderate
March Weather6°C (44°F)111 mm (4.4 inches)75%high
April Weather11°C (52°F)92 mm (3.6 inches)77%very high
May Weather18°C (65°F)175 mm (6.9 inches)82%very high
June Weather24°C (76°F)123 mm (4.9 inches)83%extreme
July Weather26°C (79°F)86 mm (3.4 inches)81%extreme
August Weather24°C (75°F)90 mm (3.5 inches)78%very high
September Weather21°C (70°F)87 mm (3.4 inches)72%very high
October Weather13°C (56°F)118 mm (4.6 inches)72%high
November Weather5°C (42°F)50 mm (2.0 inches)84%moderate
December Weather2°C (35°F)39 mm (1.6 inches)86%moderate

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