July Weather in Decatur, United States

Last updated: June 24, 2025

In July, the average temperature in Decatur, United States hovers around a pleasant 26°C (80°F). Expect minimums of 15°C (60°F) and peak highs reaching 38°C (101°F). With an average humidity of 78%, you might feel the warmth a bit more. Don't forget your umbrella, as you can expect about 101 mm (4.0 in) of precipitation over approximately 10 days!

July Temperature in Decatur

In July in Decatur, the average temperature is 26°C (80°F), with maximums reaching 38°C (101°F) and minimums dropping as low as 15°C (60°F). This makes it a great time to explore the area, so pack accordingly for warm days and cooler evenings.

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

The chart illustrates July 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, July typically has an average temperature of 26°C (80°F), with highs reaching up to 38°C (101°F) and lows dropping to around 15°C (60°F).

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

July Precipitation in Decatur

In Decatur in July, the precipitation amount is 101 mm (4.0 in) spread over the course of 10 days.

July Precipitation Trends in Decatur

The chart displays monthly precipitation patterns in Decatur, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Decatur, July typically receives around 101 mm (4.0 inches) of precipitation spread over approximately 10 days.

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

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Millimeters (mm) Inches (in)

July Humidity in Decatur

In Decatur in July, humidity is 78%. With an average temperature of 26°C (80°F), this humidity feels like a warm blanket wrapping around you, making travel feel sticky and heavy, while the air clings to your skin and encourages frequent breaks in shaded spots to stay cool.

July Average Humidity in Decatur

This chart illustrates the average monthly humidity levels in Decatur, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Decatur is approximately 78%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in Decatur

In Decatur in July, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Decatur.

Maximum UV Index Levels in Decatur for July

The chart shows the monthly maximum UV Index (UVI) for Decatur in July, 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 July, the maximum UV index in Decatur typically reaches 11, which falls under the extreme exposure category.

Data source: Decatur July 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 July 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 July’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 July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	3°C (38°F)	84 mm (3.3 inches)	81%	moderate
February Weather	5°C (41°F)	95 mm (3.8 inches)	78%	high
March Weather	11°C (52°F)	143 mm (5.6 inches)	76%	high
April Weather	14°C (57°F)	183 mm (7.2 inches)	78%	very high
May Weather	20°C (68°F)	175 mm (6.9 inches)	83%	very high
June Weather	25°C (76°F)	88 mm (3.5 inches)	83%	extreme
July Weather	26°C (80°F)	101 mm (4.0 inches)	78%	extreme
August Weather	25°C (77°F)	153 mm (6.0 inches)	68%	very high
September Weather	23°C (74°F)	71 mm (2.8 inches)	64%	very high
October Weather	16°C (60°F)	162 mm (6.4 inches)	70%	high
November Weather	9°C (48°F)	66 mm (2.6 inches)	83%	moderate
December Weather	6°C (44°F)	70 mm (2.8 inches)	87%	moderate