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September Weather in La Mesa, Mexico

Last updated: August 27, 2025

In September, the average temperature in La Mesa, Mexico reaches a pleasant 24°C (76°F). However, be prepared for temperature variations; it can dip as low as 10°C (50°F) and soar up to a scorching 36°C (97°F). Expect about 53 mm (2.1 in) of precipitation over approximately 7 days, accompanied by an average humidity level of 72%. Stay cool and hydrated!

September Temperature in La Mesa

In September in La Mesa, the average temperature is 24°C (76°F). Maximum temperatures can reach 36°C (97°F), while minimums can drop as low as 10°C (50°F). This makes La Mesa a great destination for travelers seeking warm weather while also being prepared for cooler evenings.

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 (76°F), with highs reaching up to 36°C (97°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec495056657181797875685950
Data source: Temperature data for La Mesa 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 La Mesa

In La Mesa in September, the total precipitation amount is 53 mm (2.1 in) spread over a period of 7 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 53 mm (2.1 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec35422543101199153143027
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in La Mesa

In La Mesa in September humidity is 72%. With an average temperature of 24°C (76°F), this humidity feels like a warm, muggy embrace that can make outdoor activities a bit uncomfortable, so travelers should stay hydrated and plan for frequent breaks in the shade.

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 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%71%60%43%32%28%38%60%72%66%74%81%
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 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 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 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec5710121213121211965
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.
 TemperaturePrecipitationHumidityUV
January Weather10°C (49°F)35 mm (1.4 inches)74%moderate
February Weather10°C (50°F)42 mm (1.6 inches)71%high
March Weather14°C (57°F)25 mm (1.0 inches)60%very high
April Weather18°C (65°F)4 mm (0.2 inches)43%extreme
May Weather22°C (72°F)3 mm (0.1 inches)32%extreme
June Weather27°C (82°F)10 mm (0.4 inches)28%extreme
July Weather26°C (79°F)119 mm (4.7 inches)38%extreme
August Weather26°C (78°F)91 mm (3.6 inches)60%extreme
September Weather24°C (76°F)53 mm (2.1 inches)72%extreme
October Weather20°C (68°F)14 mm (0.6 inches)66%very high
November Weather15°C (60°F)30 mm (1.2 inches)74%high
December Weather10°C (50°F)27 mm (1.1 inches)81%moderate

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