July Weather in Lewisville, United States

Last updated: June 24, 2025

In July, the average temperature in Lewisville, United States is a warm 28°C (83°F), where you can expect a minimum of 18°C (65°F) and occasional highs reaching 40°C (104°F). With 70 mm (2.8 in) of precipitation spread across about 11 days, it's wise to stay prepared for some rain. The average humidity is around 72%, adding a touch of mugginess to the tropical vibe!

July Temperature in Lewisville

In July in Lewisville, the average temperature is 28°C (83°F). The maximum can reach 40°C (104°F), and the minimum can be as low as 18°C (65°F). Travelers should prepare for warm weather with potential heat peaks, making it a great time for beach activities and exploring the outdoors, while also ensuring to stay hydrated and protected from the sun.

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

The chart illustrates July temperature patterns in Lewisville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lewisville, July typically has an average temperature of 28°C (83°F), with highs reaching up to 40°C (104°F) and lows dropping to around 18°C (65°F).

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

July Precipitation in Lewisville

In Lewisville in July, the precipitation amount is 70 mm (2.8 in) distributed over 11 days.

July Precipitation Trends in Lewisville

The chart displays monthly precipitation patterns in Lewisville, 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 Lewisville, July typically receives around 70 mm (2.8 inches) of precipitation spread over approximately 11 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 Lewisville

In Lewisville in July, humidity is 72%. With an average temperature of 28°C (83°F), this humidity feels like you're walking through a warm, damp blanket, making travel particularly stifling and sticky, where even short excursions can leave you feeling overheated and in need of frequent breaks for hydration.

July Average Humidity in Lewisville

This chart illustrates the average monthly humidity levels in Lewisville, 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 Lewisville is approximately 72%, 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 Lewisville

In Lewisville 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 Lewisville.

Maximum UV Index Levels in Lewisville for July

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

Data source: Lewisville 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 Lewisville Compares to Other Months

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

This table compares monthly weather conditions in Lewisville, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (47°F)	102 mm (4.0 inches)	82%	moderate
February Weather	10°C (50°F)	161 mm (6.3 inches)	80%	high
March Weather	15°C (60°F)	138 mm (5.4 inches)	78%	very high
April Weather	18°C (64°F)	183 mm (7.2 inches)	79%	extreme
May Weather	23°C (74°F)	143 mm (5.6 inches)	81%	extreme
June Weather	27°C (81°F)	115 mm (4.5 inches)	77%	extreme
July Weather	28°C (83°F)	70 mm (2.8 inches)	72%	extreme
August Weather	28°C (83°F)	100 mm (3.9 inches)	65%	extreme
September Weather	26°C (78°F)	89 mm (3.5 inches)	63%	very high
October Weather	19°C (67°F)	105 mm (4.1 inches)	70%	very high
November Weather	13°C (55°F)	69 mm (2.7 inches)	82%	high
December Weather	10°C (51°F)	143 mm (5.6 inches)	88%	moderate