September Weather in Fronteras, Mexico

Last updated: August 27, 2025

In September, the average temperature in Fronteras, Mexico is a pleasant 25°C (78°F). Expect a range that dips to a cool 12°C (55°F) at night and soars to a sizzling 38°C (100°F) during the day. While you're enjoying the warmth, keep in mind that precipitation averages around 36 mm (1.4 in) over 5 days, accompanied by a humidity level of 74%—perfect for staying hydrated!

September Temperature in Fronteras

In September in Fronteras, the average temperature is 25°C (78°F). Maximums can reach 38°C (100°F), and minimums can be as low as 12°C (55°F). This makes it an ideal time for travelers seeking warm weather and a variety of outdoor activities.

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

The chart illustrates September temperature patterns in Fronteras, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fronteras, September typically has an average temperature of 25°C (78°F), with highs reaching up to 38°C (100°F) and lows dropping to around 12°C (55°F).

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

September Precipitation in Fronteras

In Fronteras in September, the precipitation amount is 36 mm (1.4 in) over the course of 5 days.

September Precipitation Trends in Fronteras

The chart displays monthly precipitation patterns in Fronteras, 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 Fronteras, September typically receives around 36 mm (1.4 inches) of precipitation spread over approximately 5 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Fronteras

In Fronteras in September humidity is 74%. With an average temperature of 25°C (78°F), this humidity feels like you're enveloped in a warm, thick blanket, making outdoor activities feel more strenuous and necessitating frequent breaks and hydration for comfortable travel.

September Average Humidity in Fronteras

This chart illustrates the average monthly humidity levels in Fronteras, 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 Fronteras is approximately 74%, 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 Fronteras

In Fronteras in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Fronteras.

Maximum UV Index Levels in Fronteras for September

The chart shows the monthly maximum UV Index (UVI) for Fronteras 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 Fronteras typically reaches 11, which falls under the extreme exposure category.

Data source: Fronteras 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 Fronteras Compares to Other Months

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

This table compares monthly weather conditions in Fronteras, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (50°F)	25 mm (1.0 inches)	79%	moderate
February Weather	12°C (53°F)	24 mm (1.0 inches)	76%	very high
March Weather	15°C (60°F)	22 mm (0.9 inches)	66%	very high
April Weather	20°C (69°F)	3 mm (0.1 inches)	51%	extreme
May Weather	24°C (76°F)	2 mm (0.1 inches)	42%	extreme
June Weather	29°C (85°F)	8 mm (0.3 inches)	37%	extreme
July Weather	28°C (83°F)	56 mm (2.2 inches)	51%	extreme
August Weather	27°C (82°F)	61 mm (2.4 inches)	64%	extreme
September Weather	25°C (78°F)	36 mm (1.4 inches)	74%	extreme
October Weather	21°C (70°F)	15 mm (0.6 inches)	71%	very high
November Weather	15°C (60°F)	32 mm (1.3 inches)	78%	high
December Weather	10°C (51°F)	28 mm (1.1 inches)	85%	moderate