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September Weather in Rivera, Uruguay

Last updated: August 28, 2025

In September, the average temperature in Rivera, Uruguay hovers around 16°C (61°F). Expect a wide range in temperatures, with minimums dipping to 2°C (35°F) and maximums soaring to 31°C (89°F). Precipitation is also notable, with an average of 173 mm (6.8 in) over 10 days. Don't forget your umbrella! With an average humidity of 62%, the air can feel quite moist.

September Temperature in Rivera

In September in Rivera, the average temperature is 16°C (61°F), with maximums reaching up to 31°C (89°F) and minimums dipping down to as low as 2°C (35°F). This climate makes it an ideal destination for travelers seeking a balance of pleasant weather and comfortable temperatures.

September Weather in Rivera: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Rivera, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rivera, September typically has an average temperature of 16°C (61°F), with highs reaching up to 31°C (89°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec767471675956545661657074
Data source: Temperature data for Rivera 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 Rivera

In Rivera in September, the precipitation amount is 173 mm (6.8 in) over the course of 10 days.

September Precipitation Trends in Rivera

The chart displays monthly precipitation patterns in Rivera, 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 Rivera, September typically receives around 173 mm (6.8 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec152108981051381138910917414510654
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Rivera

In Rivera in September, humidity is 62%. With an average temperature of 16°C (61°F), this humidity feels like a gentle blanket, making traveling comfortable yet occasionally sticky, prompting the need for light, breathable clothing to fully enjoy the sights.

September Average Humidity in Rivera

This chart illustrates the average monthly humidity levels in Rivera, 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 Rivera is approximately 62%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec64%58%68%79%79%78%70%55%62%64%64%73%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Rivera

In Rivera 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 Rivera.

Maximum UV Index Levels in Rivera for September

The chart shows the monthly maximum UV Index (UVI) for Rivera 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 Rivera typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151412954579121415
Data source: Rivera 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 Rivera Compares to Other Months

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

This table compares monthly weather conditions in Rivera, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (76°F)152 mm (6.0 inches)63%extreme
February Weather24°C (75°F)108 mm (4.2 inches)58%extreme
March Weather22°C (71°F)97 mm (3.8 inches)68%extreme
April Weather19°C (67°F)105 mm (4.1 inches)78%very high
May Weather15°C (59°F)138 mm (5.4 inches)79%moderate
June Weather13°C (56°F)113 mm (4.5 inches)78%moderate
July Weather12°C (54°F)89 mm (3.5 inches)70%moderate
August Weather14°C (57°F)109 mm (4.3 inches)55%high
September Weather16°C (61°F)173 mm (6.8 inches)62%very high
October Weather18°C (65°F)145 mm (5.7 inches)64%extreme
November Weather21°C (70°F)106 mm (4.2 inches)64%extreme
December Weather23°C (74°F)54 mm (2.1 inches)73%extreme

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