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August Weather in Rio Grande, Puerto Rico

Last updated: August 31, 2025

In August, the average temperature in Rio Grande, Puerto Rico hovers around 28°C (82°F), with a comfortable minimum of 25°C (77°F) and a warm maximum of 31°C (88°F). However, be prepared for some rain, as the region experiences an average precipitation of 111 mm (4.4 in) over 24 days, paired with a relatively high humidity level of 80%.

August Temperature in Rio Grande

In August in Rio Grande, the average temperature is 28°C (82°F), with maximums reaching up to 31°C (88°F) and minimums dipping as low as 25°C (77°F). This warm climate makes Rio Grande an ideal destination for travelers seeking pleasant weather.

August Weather in Rio Grande: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Rio Grande, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rio Grande, August typically has an average temperature of 28°C (82°F), with highs reaching up to 31°C (88°F) and lows dropping to around 25°C (77°F).
JanFebMarAprMayJunJulAugSepOctNovDec777777788081828282818079
Data source: Temperature data for Rio Grande 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.

August Precipitation in Rio Grande

In Rio Grande in August, the total precipitation amount is 111 mm (4.4 in) spread over 24 days.

August Precipitation Trends in Rio Grande

The chart displays monthly precipitation patterns in Rio Grande, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Rio Grande, August typically receives around 111 mm (4.4 inches) of precipitation spread over approximately 24 days.
JanFebMarAprMayJunJulAugSepOctNovDec49526355746911011115414111268
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Rio Grande

In Rio Grande in August, humidity is 80%. With an average temperature of 28°C (82°F), this humidity feels like a warm, thick blanket enveloping you, making outdoor activities sweaty and demanding frequent breaks in the shade while traveling.

August Average Humidity in Rio Grande

This chart illustrates the average monthly humidity levels in Rio Grande, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Rio Grande is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%75%74%75%75%77%80%80%79%78%78%76%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Rio Grande

In Rio Grande in August, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Rio Grande.

Maximum UV Index Levels in Rio Grande for August

The chart shows the monthly maximum UV Index (UVI) for Rio Grande in August, 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 August, the maximum UV index in Rio Grande typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec911131313131213141298
Data source: Rio Grande August 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 August Weather in Rio Grande Compares to Other Months

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

This table compares monthly weather conditions in Rio Grande, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (77°F)49 mm (1.9 inches)76%very high
February Weather25°C (77°F)52 mm (2.1 inches)75%extreme
March Weather25°C (77°F)63 mm (2.5 inches)74%extreme
April Weather26°C (78°F)55 mm (2.2 inches)75%extreme
May Weather26°C (80°F)74 mm (2.9 inches)75%extreme
June Weather27°C (81°F)69 mm (2.7 inches)77%extreme
July Weather28°C (82°F)110 mm (4.3 inches)80%extreme
August Weather28°C (82°F)111 mm (4.4 inches)80%extreme
September Weather28°C (82°F)154 mm (6.0 inches)79%extreme
October Weather27°C (82°F)140 mm (5.5 inches)78%extreme
November Weather27°C (80°F)112 mm (4.4 inches)78%very high
December Weather26°C (79°F)68 mm (2.7 inches)76%very high

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