nomadseason

August Weather in McAllen, United States

Last updated: June 24, 2025

The average temperature in McAllen, United States during August is a warm 31°C (88°F). Temperatures can vary significantly, dropping to a minimum of 23°C (75°F) and peaking at a scorching 41°C (106°F). Expect some light rain, with precipitation totaling 22 mm (0.9 in) over approximately 5 days. Humidity levels often hover around 65%, adding to the warmth of the month.

August Temperature in McAllen

In August in McAllen, the average temperature is 31°C (88°F), with maximums reaching up to 41°C (106°F) and minimums dipping as low as 23°C (75°F). Travelers should be prepared for hot weather and stay hydrated during their visit.

August Weather in McAllen: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in McAllen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In McAllen, August typically has an average temperature of 31°C (88°F), with highs reaching up to 41°C (106°F) and lows dropping to around 23°C (75°F).
JanFebMarAprMayJunJulAugSepOctNovDec616572778285868884776964
Data source: Temperature data for McAllen generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

August Precipitation in McAllen

In McAllen in August, the total precipitation amount is 22 mm (0.9 in) spread over a period of 5 days.

August Precipitation Trends in McAllen

The chart displays monthly precipitation patterns in McAllen, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In McAllen, August typically receives around 22 mm (0.9 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec2021313187811002296513021
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

August Humidity in McAllen

In McAllen in August, humidity is 65%. With an average temperature of 31°C (88°F), this humidity feels like a heavy blanket wrapping around you, making every step feel sluggish and your clothes cling uncomfortably to your skin, which can be quite challenging for traveling.

August Average Humidity in McAllen

This chart illustrates the average monthly humidity levels in McAllen, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in McAllen is approximately 65%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%79%76%77%80%73%66%65%73%76%80%86%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in McAllen

In McAllen in August, 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 McAllen.

Maximum UV Index Levels in McAllen for August

The chart shows the monthly maximum UV Index (UVI) for McAllen in August, 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 August, the maximum UV index in McAllen typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec6910111212121211976
Data source: McAllen August 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 August Weather in McAllen Compares to Other Months

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

This table compares monthly weather conditions in McAllen, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather16°C (62°F)20 mm (0.8 inches)83%high
February Weather18°C (65°F)21 mm (0.8 inches)79%very high
March Weather22°C (72°F)31 mm (1.2 inches)76%very high
April Weather25°C (78°F)31 mm (1.2 inches)77%extreme
May Weather28°C (83°F)87 mm (3.4 inches)80%extreme
June Weather30°C (86°F)81 mm (3.2 inches)73%extreme
July Weather30°C (87°F)100 mm (3.9 inches)66%extreme
August Weather31°C (88°F)22 mm (0.9 inches)65%extreme
September Weather29°C (84°F)96 mm (3.8 inches)73%extreme
October Weather25°C (77°F)51 mm (2.0 inches)76%very high
November Weather20°C (69°F)30 mm (1.2 inches)80%high
December Weather18°C (64°F)21 mm (0.8 inches)86%high

Compare McAllen's Climate with Cities Worldwide