September Weather in Rio Viejo, Mexico

Last updated: August 27, 2025

In September, the average temperature in Rio Viejo, Mexico reaches a warm 28°C (82°F). Expect a cozy minimum of 22°C (73°F) and a peak of 34°C (94°F). However, be prepared for some rain, as 287 mm (11.3 in) of precipitation falls over 24 days, contributing to a high average humidity of 83%.

September Temperature in Rio Viejo

In September in Rio Viejo, the average temperature is 28°C (82°F), with maximums reaching 34°C (94°F) and minimums dropping to 22°C (73°F). Travelers can expect warm and pleasant weather, ideal for outdoor activities and exploration.

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

The chart illustrates September temperature patterns in Rio Viejo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rio Viejo, September typically has an average temperature of 28°C (82°F), with highs reaching up to 34°C (94°F) and lows dropping to around 22°C (73°F).

Data source: Temperature data for Rio Viejo generated using information from the Copernicus Climate Change Service.

September Precipitation in Rio Viejo

In Rio Viejo in September, the precipitation amount is 287 mm (11.3 in) occurring over a span of 24 days.

September Precipitation Trends in Rio Viejo

The chart displays monthly precipitation patterns in Rio Viejo, 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 Viejo, September typically receives around 287 mm (11.3 inches) of precipitation spread over approximately 24 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Rio Viejo

In Rio Viejo in September humidity is 83%. With an average temperature of 28°C (82°F), this humidity feels like stepping into a warm, thick blanket, making travel languid and drenched in sweat.

September Average Humidity in Rio Viejo

This chart illustrates the average monthly humidity levels in Rio Viejo, 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 Viejo is approximately 83%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Rio Viejo

In Rio Viejo in September, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Rio Viejo.

Maximum UV Index Levels in Rio Viejo for September

The chart shows the monthly maximum UV Index (UVI) for Rio Viejo 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 Viejo typically reaches 12, which falls under the extreme exposure category.

Data source: Rio Viejo 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 Viejo Compares to Other Months

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

This table compares monthly weather conditions in Rio Viejo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	21°C (70°F)	13 mm (0.5 inches)	74%	high
February Weather	22°C (71°F)	15 mm (0.6 inches)	66%	very high
March Weather	23°C (73°F)	0 mm (0.0 inches)	61%	extreme
April Weather	24°C (75°F)	0 mm (0.0 inches)	56%	extreme
May Weather	26°C (79°F)	0 mm (0.0 inches)	61%	extreme
June Weather	28°C (83°F)	57 mm (2.3 inches)	73%	extreme
July Weather	29°C (85°F)	150 mm (5.9 inches)	82%	extreme
August Weather	28°C (83°F)	297 mm (11.7 inches)	83%	extreme
September Weather	28°C (82°F)	287 mm (11.3 inches)	83%	extreme
October Weather	27°C (81°F)	136 mm (5.4 inches)	78%	extreme
November Weather	24°C (76°F)	9 mm (0.4 inches)	77%	very high
December Weather	22°C (71°F)	11 mm (0.4 inches)	78%	high