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August Weather in Fort Smith, United States

Last updated: June 24, 2025

In Fort Smith, United States, the average temperature in August hovers around 26°C (79°F). Expect a minimum of 16°C (61°F) and soaring highs that can reach up to 37°C (99°F). During this month, precipitation amounts to 132 mm (5.2 in) over approximately 12 days, and the average humidity stands at a comfortable 61%.

August Temperature in Fort Smith

In August in Fort Smith, the average temperature is 26°C (79°F). Maximums can reach 37°C (99°F), while minimums can dip as low as 16°C (61°F). This variety in temperatures makes it a perfect time for travelers to enjoy both the warm days and cooler evenings.

August Weather in Fort Smith: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Fort Smith, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fort Smith, August typically has an average temperature of 26°C (79°F), with highs reaching up to 37°C (99°F) and lows dropping to around 16°C (61°F).
JanFebMarAprMayJunJulAugSepOctNovDec404354596978817975625045
Data source: Temperature data for Fort Smith 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.

August Precipitation in Fort Smith

In Fort Smith in August, the precipitation amount is 132 mm (5.2 in) over the course of 12 days.

August Precipitation Trends in Fort Smith

The chart displays monthly precipitation patterns in Fort Smith, 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 Fort Smith, August typically receives around 132 mm (5.2 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec981231421572139198132781518798
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Fort Smith

In Fort Smith in August humidity is 61%. With an average temperature of 26°C (79°F), this humidity feels like a warm, tropical embrace, making traveling both invigorating and a bit sticky, as you'll find yourself seeking shade and refreshing beverages to stay comfortable while exploring.

August Average Humidity in Fort Smith

This chart illustrates the average monthly humidity levels in Fort Smith, 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 Fort Smith is approximately 61%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%79%77%78%82%81%75%61%59%69%82%88%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Fort Smith

In Fort Smith in August, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Fort Smith.

Maximum UV Index Levels in Fort Smith for August

The chart shows the monthly maximum UV Index (UVI) for Fort Smith 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 Fort Smith typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46710111111109754
Data source: Fort Smith 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 Fort Smith Compares to Other Months

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

This table compares monthly weather conditions in Fort Smith, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)98 mm (3.9 inches)82%moderate
February Weather6°C (43°F)123 mm (4.8 inches)79%high
March Weather12°C (54°F)141 mm (5.6 inches)77%high
April Weather15°C (60°F)157 mm (6.2 inches)78%very high
May Weather21°C (70°F)213 mm (8.4 inches)82%extreme
June Weather25°C (78°F)91 mm (3.6 inches)81%extreme
July Weather27°C (81°F)98 mm (3.8 inches)75%extreme
August Weather26°C (79°F)132 mm (5.2 inches)61%very high
September Weather24°C (76°F)78 mm (3.1 inches)59%very high
October Weather17°C (63°F)151 mm (5.9 inches)69%high
November Weather10°C (50°F)87 mm (3.4 inches)82%moderate
December Weather7°C (46°F)98 mm (3.9 inches)87%moderate

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