May Weather in Lewisville, United States

Last updated: June 24, 2025

In May, the average temperature in Lewisville, United States is a pleasant 23°C (74°F). You can expect a minimum of 9°C (49°F) and a maximum that can soar up to 35°C (96°F). During this time, the region experiences 143 mm (5.6 in) of precipitation over 13 days, contributing to an average humidity of 81%.

May Temperature in Lewisville

In May in Lewisville, the average temperature is 23°C (74°F). Maximums can reach 35°C (96°F) and minimums can be as low as 9°C (49°F). It’s a great time to explore Lewisville, so pack accordingly to enjoy a range of outdoor activities!

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

The chart illustrates May 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, May typically has an average temperature of 23°C (74°F), with highs reaching up to 35°C (96°F) and lows dropping to around 9°C (49°F).

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

May Precipitation in Lewisville

In Lewisville in May, the precipitation amount is 143 mm (5.6 in) over a span of 13 days.

May Precipitation Trends in Lewisville

The chart displays monthly precipitation patterns in Lewisville, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Lewisville, May typically receives around 143 mm (5.6 inches) of precipitation spread over approximately 13 days.

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

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Millimeters (mm) Inches (in)

May Humidity in Lewisville

In Lewisville in May, humidity is 81%. With an average temperature of 23°C (74°F), this humidity feels like a warm, heavy blanket draped over your skin, making travel feel a bit more sluggish and requiring plenty of water breaks to stay comfortable.

May Average Humidity in Lewisville

This chart illustrates the average monthly humidity levels in Lewisville, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Lewisville is approximately 81%, offering insight into how humid the weather typically is during this month.

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

May UV Index in Lewisville

In Lewisville in May, 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 May

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

Data source: Lewisville May 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 May 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 May’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 May’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