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September Weather in Las Cruces, Mexico

Last updated: August 27, 2025

In September, the average temperature in Las Cruces, Mexico is a comfortable 18°C (65°F). Visitors can expect minimum temperatures as low as 8°C (46°F) and highs reaching up to 30°C (86°F). With an average humidity of 82% and 70 mm (2.8 in) of precipitation spread over 9 days, be prepared for a mix of sunny days and refreshing showers.

September Temperature in Las Cruces

In September in Las Cruces, the average temperature is 18°C (65°F), with maximums reaching up to 30°C (86°F) and minimums dropping as low as 8°C (46°F). This mild climate makes Las Cruces an ideal destination for travelers looking to enjoy pleasant outdoor activities.

September Weather in Las Cruces: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Las Cruces, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Las Cruces, September typically has an average temperature of 18°C (65°F), with highs reaching up to 30°C (86°F) and lows dropping to around 8°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec434652596673706865605244
Data source: Temperature data for Las Cruces 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 Las Cruces

In Las Cruces in September, the total precipitation amount is 70 mm (2.8 in) spread over 9 days.

September Precipitation Trends in Las Cruces

The chart displays monthly precipitation patterns in Las Cruces, 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 Las Cruces, September typically receives around 70 mm (2.8 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec141413442112711070271619
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Las Cruces

In Las Cruces in September, humidity is 82%. With an average temperature of 18°C (65°F), this humidity feels like a warm, sticky embrace that can quickly leave travelers feeling fatigued and in need of frequent breaks to stay refreshed and hydrated.

September Average Humidity in Las Cruces

This chart illustrates the average monthly humidity levels in Las Cruces, 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 Las Cruces is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%69%63%50%39%36%60%78%82%76%80%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Las Cruces

In Las Cruces 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 Las Cruces.

Maximum UV Index Levels in Las Cruces for September

The chart shows the monthly maximum UV Index (UVI) for Las Cruces 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 Las Cruces typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec69111313131313121076
Data source: Las Cruces 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 Las Cruces Compares to Other Months

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

This table compares monthly weather conditions in Las Cruces, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)14 mm (0.5 inches)78%high
February Weather8°C (46°F)14 mm (0.5 inches)69%very high
March Weather11°C (53°F)13 mm (0.5 inches)63%extreme
April Weather15°C (60°F)4 mm (0.2 inches)49%extreme
May Weather19°C (66°F)4 mm (0.2 inches)39%extreme
June Weather23°C (73°F)21 mm (0.8 inches)36%extreme
July Weather21°C (70°F)127 mm (5.0 inches)60%extreme
August Weather20°C (68°F)110 mm (4.3 inches)78%extreme
September Weather18°C (65°F)70 mm (2.8 inches)82%extreme
October Weather15°C (60°F)27 mm (1.0 inches)76%very high
November Weather11°C (52°F)16 mm (0.6 inches)80%high
December Weather7°C (44°F)19 mm (0.7 inches)85%high

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