July Weather in Decatur, United States

Last updated: June 24, 2025

In Decatur, United States, the average temperature in July hovers around 27°C (81°F), making it a delightful destination. Expect minimum temperatures to dip to 18°C (64°F), while daytime highs can reach a balmy 35°C (95°F). During this month, you can anticipate about 105 mm (4.1 in) of precipitation spread across 15 days, contributing to an average humidity level of 78%.

July Temperature in Decatur

In July in Decatur, the average temperature is 27°C (81°F). Maximums can reach up to 35°C (95°F), and minimums can drop as low as 18°C (64°F). This pleasant climate makes it an ideal time to explore the outdoors and enjoy various activities while traveling.

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 27°C (81°F), with highs reaching up to 35°C (95°F) and lows dropping to around 18°C (64°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 total precipitation amount is 105 mm (4.1 in) over a span of 15 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 105 mm (4.1 inches) of precipitation spread over approximately 15 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 27°C (81°F), this humidity feels like a warm, heavy embrace that makes traveling feel both invigorating and exhausting. Moments spent outside can quickly become clammy and uncomfortable, urging travelers to seek shade and hydration as they explore.

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	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