August Weather in Decatur, United States

Last updated: June 24, 2025

In August, the average temperature in Decatur, United States is a warm 26°C (80°F). Expect a range where the minimum dips to 17°C (62°F) and the maximum can soar up to 36°C (97°F). With average humidity at 67%, you'll likely encounter a fair amount of moisture in the air. Be prepared for 112 mm (4.4 in) of precipitation over roughly 14 days, adding to the vibrant atmosphere of this beautiful location!

August Temperature in Decatur

In August in Decatur, the average temperature is 26°C (80°F). The maximum can reach 36°C (97°F) and the minimum can be as low as 17°C (62°F). It's a great time for travelers to enjoy warm weather while having the option for cooler evenings.

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 26°C (80°F), with highs reaching up to 36°C (97°F) and lows dropping to around 17°C (62°F).

Data source: Temperature data for Decatur generated using information from the Copernicus Climate Change Service.

August Precipitation in Decatur

In Decatur in August, the precipitation amount is 112 mm (4.4 in) spread over 14 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 112 mm (4.4 inches) of precipitation spread over approximately 14 days.

Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

August Humidity in Decatur

In Decatur in August, humidity is 67%. With an average temperature of 26°C (80°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities sticky and uncomfortable for traveling.

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 67%, offering insight into how humid the weather typically is during this month.

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 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 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 10, which falls under the very high exposure category.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (44°F)	110 mm (4.3 inches)	87%	moderate
February Weather	10°C (50°F)	181 mm (7.1 inches)	87%	high
March Weather	13°C (56°F)	178 mm (7.0 inches)	85%	very high
April Weather	17°C (62°F)	146 mm (5.8 inches)	82%	very high
May Weather	22°C (72°F)	108 mm (4.2 inches)	83%	extreme
June Weather	25°C (77°F)	147 mm (5.8 inches)	82%	extreme
July Weather	27°C (81°F)	105 mm (4.1 inches)	78%	extreme
August Weather	26°C (80°F)	112 mm (4.4 inches)	67%	very high
September Weather	24°C (76°F)	111 mm (4.4 inches)	64%	very high
October Weather	19°C (66°F)	122 mm (4.8 inches)	74%	high
November Weather	11°C (51°F)	74 mm (2.9 inches)	87%	moderate
December Weather	9°C (48°F)	152 mm (6.0 inches)	88%	moderate