September Weather in Montemorelos, Mexico

Last updated: August 26, 2025

In September, the average temperature in Montemorelos, Mexico hovers around 26°C (79°F). Expect a range where the minimum temperature can dip to 16°C (61°F) while the highs can soar up to 38°C (100°F). With a notable precipitation amount of 147 mm (5.8 in) spread across 13 days, the average humidity sits at a comfortable 75%. Make sure to prepare for both warm days and intermittent rain!

September Temperature in Montemorelos

In September in Montemorelos, the average temperature is 26°C (79°F). Maximum temperatures can reach 38°C (100°F), while minimums can drop as low as 16°C (61°F). This climate makes Montemorelos an ideal destination for travelers seeking warm weather and plenty of sunshine.

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

The chart illustrates September temperature patterns in Montemorelos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Montemorelos, September typically has an average temperature of 26°C (79°F), with highs reaching up to 38°C (100°F) and lows dropping to around 16°C (61°F).

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

September Precipitation in Montemorelos

In Montemorelos in September, the total precipitation amount is 147 mm (5.8 in), which occurs over a span of 13 days.

September Precipitation Trends in Montemorelos

The chart displays monthly precipitation patterns in Montemorelos, 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 Montemorelos, September typically receives around 147 mm (5.8 inches) of precipitation spread over approximately 13 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 Montemorelos

In Montemorelos in September, humidity is 75%. With an average temperature of 26°C (79°F), this humidity feels like a warm blanket wrapped around you, making traveling a sticky experience where every step requires extra effort and frequent breaks to cool off.

September Average Humidity in Montemorelos

This chart illustrates the average monthly humidity levels in Montemorelos, 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 Montemorelos is approximately 75%, 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 Montemorelos

In Montemorelos 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 Montemorelos.

Maximum UV Index Levels in Montemorelos for September

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

Data source: Montemorelos 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 Montemorelos Compares to Other Months

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

This table compares monthly weather conditions in Montemorelos, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	15°C (59°F)	23 mm (0.9 inches)	84%	high
February Weather	17°C (63°F)	19 mm (0.8 inches)	83%	very high
March Weather	21°C (70°F)	33 mm (1.3 inches)	78%	very high
April Weather	24°C (75°F)	72 mm (2.8 inches)	81%	extreme
May Weather	27°C (80°F)	99 mm (3.9 inches)	82%	extreme
June Weather	28°C (82°F)	70 mm (2.7 inches)	74%	extreme
July Weather	28°C (83°F)	77 mm (3.0 inches)	68%	extreme
August Weather	29°C (85°F)	16 mm (0.6 inches)	67%	extreme
September Weather	26°C (79°F)	147 mm (5.8 inches)	75%	extreme
October Weather	23°C (73°F)	63 mm (2.5 inches)	78%	very high
November Weather	18°C (66°F)	29 mm (1.1 inches)	83%	very high
December Weather	16°C (61°F)	23 mm (0.9 inches)	86%	high