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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 19°C (67°F). However, be prepared for variability; temperatures can dip as low as -2°C (29°F) or soar up to 35°C (96°F). Expect about 28 mm (1.1 in) of precipitation over 4 days and an average humidity level of 59%.

September Temperature in La Plata

In September in La Plata, the average temperature is 19°C (67°F), with maximums reaching up to 35°C (96°F) and minimums dropping as low as -2°C (29°F). Whether you're looking to enjoy warm days or need to prepare for chilly nights, pack accordingly for a varied climate.

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 19°C (67°F), with highs reaching up to 35°C (96°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec273141526172777566524128
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 28 mm (1.1 in) over the course of 4 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 28 mm (1.1 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec36414816259261128262236
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 59%. With an average temperature of 19°C (67°F), this humidity feels like a gentle embrace that can be refreshing during sightseeing but may feel a bit sticky if you're on the move for extended periods.

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 59%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%86%76%69%53%40%36%44%59%74%83%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 reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more 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 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec579111213121110864
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-3°C (27°F)36 mm (1.4 inches)85%moderate
February Weather0°C (32°F)41 mm (1.6 inches)86%high
March Weather5°C (41°F)48 mm (1.9 inches)76%very high
April Weather11°C (52°F)16 mm (0.6 inches)69%extreme
May Weather16°C (61°F)25 mm (1.0 inches)53%extreme
June Weather22°C (73°F)9 mm (0.4 inches)40%extreme
July Weather25°C (77°F)26 mm (1.0 inches)36%extreme
August Weather24°C (75°F)11 mm (0.4 inches)44%extreme
September Weather19°C (67°F)28 mm (1.1 inches)59%very high
October Weather11°C (52°F)26 mm (1.0 inches)74%very high
November Weather5°C (41°F)22 mm (0.9 inches)83%high
December Weather-2°C (29°F)36 mm (1.4 inches)85%moderate

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