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May Weather in Lewisville, United States

Last updated: June 24, 2025

In May, the average temperature in Lewisville, United States hovers around 20°C (69°F), offering a pleasant climate. Expect minimums as low as 2°C (36°F) and sometimes soaring to a warm 35°C (95°F). Be prepared for 124 mm (4.9 in) of precipitation spread over 12 days, contributing to an average humidity of 83%. Whether you're exploring the local sights or enjoying the outdoors, this month promises a diverse weather experience!

May Temperature in Lewisville

In May in Lewisville, the average temperature is 20°C (69°F). The maximum can reach 35°C (95°F) and the minimum can be as low as 2°C (36°F). Be prepared for a range of temperatures if you're planning to travel during this time.

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 20°C (69°F), with highs reaching up to 35°C (95°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec414652606975807773634945
Data source: Temperature data for Lewisville generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Lewisville

In Lewisville in May, the total precipitation amount is 124 mm (4.9 in) over a span of 12 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 124 mm (4.9 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec8311586117124918611413611686109
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Lewisville

In Lewisville in May, humidity is 83%. With an average temperature of 20°C (69°F), this humidity feels like a warm embrace, making every step slightly more laborious and the air thick with moisture, which can be quite stifling for traveling.

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 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%84%82%83%82%80%74%75%79%87%87%
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 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, 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 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810101110109853
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.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)83 mm (3.3 inches)86%moderate
February Weather8°C (47°F)115 mm (4.5 inches)85%high
March Weather11°C (52°F)86 mm (3.4 inches)84%very high
April Weather16°C (60°F)117 mm (4.6 inches)82%very high
May Weather20°C (69°F)124 mm (4.9 inches)83%very high
June Weather24°C (76°F)91 mm (3.6 inches)82%extreme
July Weather27°C (80°F)86 mm (3.4 inches)80%very high
August Weather25°C (78°F)114 mm (4.5 inches)74%very high
September Weather23°C (73°F)136 mm (5.4 inches)75%very high
October Weather17°C (64°F)116 mm (4.6 inches)79%very high
November Weather9°C (49°F)86 mm (3.4 inches)87%moderate
December Weather7°C (45°F)109 mm (4.3 inches)87%moderate

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