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August Weather in Decatur, United States

Last updated: June 24, 2025

In August, the average temperature in Decatur, United States hovers around 23°C (74°F), offering a warm and inviting atmosphere. Expect lows of 11°C (52°F) and highs reaching up to 33°C (92°F), perfect for a variety of activities. However, be prepared for some rain, as precipitation can total 101 mm (4.0 in) over about 9 days. Don't forget to stay hydrated; the average humidity is a comfortable 82%.

August Temperature in Decatur

In August in Decatur, the average temperature is 23°C (74°F). Maximum temperatures can reach 33°C (92°F), while minimums can drop to as low as 11°C (52°F). This range makes Decatur an ideal destination for travelers seeking pleasant weather for outdoor activities.

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

The chart illustrates August temperature patterns in Decatur, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Decatur, August typically has an average temperature of 23°C (74°F), with highs reaching up to 33°C (92°F) and lows dropping to around 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec293243526575777470574236
Data source: Temperature data for Decatur 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 Decatur

In Decatur in August, the total precipitation amount is 101 mm (4.0 in), occurring over a span of 9 days.

August Precipitation Trends in Decatur

The chart displays monthly precipitation patterns in Decatur, 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 Decatur, August typically receives around 101 mm (4.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec7676131132149112114101711207653
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Decatur

In Decatur in August, humidity is 82%. With an average temperature of 23°C (74°F), this humidity feels like you are walking through a warm, damp blanket, making travel a bit uncomfortable and sticky as you navigate the air thick with moisture.

August Average Humidity in Decatur

This chart illustrates the average monthly humidity levels in Decatur, 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 Decatur is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%84%83%80%83%82%83%79%79%88%87%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Decatur

In Decatur in August, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Decatur.

Maximum UV Index Levels in Decatur for August

The chart shows the monthly maximum UV Index (UVI) for Decatur 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 Decatur typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910111198643
Data source: Decatur 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 Decatur Compares to Other Months

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

This table compares monthly weather conditions in Decatur, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)76 mm (3.0 inches)84%moderate
February Weather0°C (32°F)76 mm (3.0 inches)82%moderate
March Weather6°C (44°F)131 mm (5.2 inches)84%high
April Weather11°C (53°F)132 mm (5.2 inches)83%very high
May Weather19°C (66°F)149 mm (5.9 inches)80%very high
June Weather24°C (75°F)112 mm (4.4 inches)83%extreme
July Weather25°C (78°F)114 mm (4.5 inches)82%extreme
August Weather23°C (74°F)101 mm (4.0 inches)82%very high
September Weather21°C (71°F)71 mm (2.8 inches)79%very high
October Weather14°C (58°F)120 mm (4.7 inches)79%high
November Weather5°C (42°F)76 mm (3.0 inches)88%moderate
December Weather2°C (36°F)53 mm (2.1 inches)87%moderate

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