September Weather in La Mesa, Mexico

Last updated: August 27, 2025

In September, the average temperature in La Mesa, Mexico stands at a pleasant 24°C (75°F), with minimums dipping to 13°C (55°F) and maximums soaring to 35°C (95°F). Expect a moderate precipitation of 64 mm (2.5 in) falling over 9 days, contributing to an average humidity level of 79%.

September Temperature in La Mesa

In September in La Mesa, the average temperature is 24°C (75°F). Maximums can reach 35°C (95°F) and minimums can be as low as 13°C (55°F). This pleasant weather makes it an ideal time for outdoor activities and exploring the vibrant surroundings.

September Weather in La Mesa: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in La Mesa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In La Mesa, September typically has an average temperature of 24°C (75°F), with highs reaching up to 35°C (95°F) and lows dropping to around 13°C (55°F).

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

September Precipitation in La Mesa

In La Mesa in September, the precipitation amount is 64 mm (2.5 in) over a span of 9 days.

September Precipitation Trends in La Mesa

The chart displays monthly precipitation patterns in La Mesa, 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 La Mesa, September typically receives around 64 mm (2.5 inches) of precipitation spread over approximately 9 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 La Mesa

In La Mesa in September, humidity is 79%. With an average temperature of 24°C (75°F), this humidity feels like a warm, tropical embrace, making traveling quite sticky and requiring ample hydration and light clothing to keep comfortable while exploring.

September Average Humidity in La Mesa

This chart illustrates the average monthly humidity levels in La Mesa, 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 La Mesa is approximately 79%, 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 La Mesa

In La Mesa 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 La Mesa.

Maximum UV Index Levels in La Mesa for September

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

Data source: La Mesa 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 La Mesa Compares to Other Months

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

This table compares monthly weather conditions in La Mesa, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	11°C (51°F)	6 mm (0.2 inches)	78%	high
February Weather	14°C (57°F)	6 mm (0.2 inches)	71%	very high
March Weather	18°C (64°F)	3 mm (0.1 inches)	60%	extreme
April Weather	22°C (72°F)	3 mm (0.1 inches)	52%	extreme
May Weather	26°C (79°F)	6 mm (0.2 inches)	49%	extreme
June Weather	29°C (84°F)	24 mm (0.9 inches)	50%	extreme
July Weather	27°C (81°F)	50 mm (2.0 inches)	65%	extreme
August Weather	27°C (80°F)	41 mm (1.6 inches)	70%	extreme
September Weather	24°C (75°F)	64 mm (2.5 inches)	79%	extreme
October Weather	20°C (69°F)	24 mm (1.0 inches)	77%	very high
November Weather	16°C (60°F)	14 mm (0.5 inches)	83%	very high
December Weather	11°C (52°F)	15 mm (0.6 inches)	84%	high