July Weather in Decatur, United States

Last updated: June 24, 2025

In July, the average temperature in Decatur, United States reaches a warm 27°C (80°F). Expect minima around 17°C (62°F) and maxima soaring up to 37°C (99°F). With 108 mm (4.2 in) of precipitation spread over 15 days, the atmosphere tends to be quite humid, boasting an average humidity level of 83%.

July Temperature in Decatur

In July in Decatur, the average temperature is 27°C (80°F). Maximums can reach 37°C (99°F) and minimums can be as low as 17°C (62°F). This climate offers a warm and pleasant atmosphere, making it an ideal time for traveling to enjoy outdoor activities and explore the local attractions.

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 (80°F), with highs reaching up to 37°C (99°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.

July Precipitation in Decatur

In Decatur in July, the total precipitation amount is 108 mm (4.2 in) over a period 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 108 mm (4.2 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 83%. With an average temperature of 27°C (80°F), this humidity feels like a warm, steamy embrace, making traveling a bit uncomfortable as the air clings to your skin and renders even the slightest exertion more exhausting.

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 83%, 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	6°C (43°F)	98 mm (3.8 inches)	86%	moderate
February Weather	9°C (48°F)	173 mm (6.8 inches)	86%	high
March Weather	12°C (54°F)	162 mm (6.4 inches)	86%	very high
April Weather	16°C (61°F)	152 mm (6.0 inches)	82%	very high
May Weather	21°C (71°F)	120 mm (4.7 inches)	85%	extreme
June Weather	24°C (76°F)	104 mm (4.1 inches)	85%	extreme
July Weather	27°C (80°F)	108 mm (4.2 inches)	83%	extreme
August Weather	26°C (79°F)	114 mm (4.5 inches)	76%	very high
September Weather	24°C (75°F)	93 mm (3.7 inches)	76%	very high
October Weather	18°C (65°F)	124 mm (4.9 inches)	80%	high
November Weather	10°C (51°F)	78 mm (3.1 inches)	88%	moderate
December Weather	8°C (47°F)	133 mm (5.2 inches)	88%	moderate