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September Weather in Rio Grande, Panama

Last updated: August 27, 2025

In September, the average temperature in Rio Grande, Panama hovers around 25°C (78°F), with daily highs reaching up to 31°C (89°F) and lows dipping to a comfortable 21°C (70°F). However, expect frequent rain, as the area receives an impressive 319 mm (12.6 in) of precipitation spread over 29 days, contributing to an average humidity level of 87%. Stay prepared for a lush and vibrant atmosphere!

September Temperature in Rio Grande

In September, in Rio Grande, the average temperature is 25°C (78°F), with maximums reaching 31°C (89°F) and minimums dropping to 21°C (70°F). This pleasant weather makes Rio Grande an ideal destination for travelers looking to enjoy a comfortable climate.

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

The chart illustrates September 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, September typically has an average temperature of 25°C (78°F), with highs reaching up to 31°C (89°F) and lows dropping to around 21°C (70°F).
JanFebMarAprMayJunJulAugSepOctNovDec777777797878787877777777
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.

September Precipitation in Rio Grande

In Rio Grande in September, the precipitation amount is 319 mm (12.6 in) over the course of 29 days.

September Precipitation Trends in Rio Grande

The chart displays monthly precipitation patterns in Rio Grande, 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 Rio Grande, September typically receives around 319 mm (12.6 inches) of precipitation spread over approximately 29 days.
JanFebMarAprMayJunJulAugSepOctNovDec4426298426825826026931933029889
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Rio Grande

In Rio Grande in September, humidity is 87%. With an average temperature of 25°C (78°F), this humidity feels like a warm, heavy blanket enveloping you, making outdoor activities particularly strenuous and requiring frequent breaks for hydration and shade.

September Average Humidity in Rio Grande

This chart illustrates the average monthly humidity levels in Rio Grande, 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 Rio Grande is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec72%71%69%70%73%90%89%87%87%86%86%79%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Rio Grande

In Rio Grande in September, 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 September

The chart shows the monthly maximum UV Index (UVI) for Rio Grande 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 Rio Grande typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec121314151513131313131210
Data source: Rio Grande 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 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 September’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 September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (77°F)44 mm (1.7 inches)72%extreme
February Weather25°C (77°F)26 mm (1.0 inches)71%extreme
March Weather25°C (78°F)29 mm (1.2 inches)69%extreme
April Weather26°C (79°F)84 mm (3.3 inches)70%extreme
May Weather26°C (79°F)268 mm (10.5 inches)73%extreme
June Weather26°C (78°F)258 mm (10.1 inches)90%extreme
July Weather25°C (78°F)260 mm (10.2 inches)88%extreme
August Weather25°C (78°F)269 mm (10.6 inches)87%extreme
September Weather25°C (78°F)319 mm (12.6 inches)87%extreme
October Weather25°C (77°F)329 mm (13.0 inches)86%extreme
November Weather25°C (77°F)298 mm (11.7 inches)86%extreme
December Weather25°C (77°F)89 mm (3.5 inches)79%very high

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