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May Weather in Lewisville, United States

Last updated: June 24, 2025

In Lewisville, United States, the average temperature in May hovers around 14°C (57°F), with a minimum dipping to 3°C (38°F) and a maximum soaring to 32°C (90°F). During this month, expect 86 mm (3.4 in) of precipitation spread over 11 days, contributing to an average humidity of 83%. Prepare for a month of varied weather that keeps you on your toes!

May Temperature in Lewisville

In May in Lewisville, the average temperature is 14°C (57°F). The maximum can reach 32°C (90°F), while the minimum can drop as low as 3°C (38°F). This makes it a great time to pack for both warm and cool weather, ensuring you're prepared for 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 14°C (57°F), with highs reaching up to 32°C (90°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec403945505762676963524540
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 precipitation amount is 86 mm (3.4 in), spread over 11 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 86 mm (3.4 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec24626018916686751013111199260273
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 14°C (57°F), this humidity feels like you're stepping into a warm, damp embrace that can make outdoor activities quite uncomfortable, often leaving you sweaty and exhausted if you're not prepared with plenty of water and breathable clothing.

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.
JanFebMarAprMayJunJulAugSepOctNovDec85%84%85%83%83%84%82%74%71%81%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 is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2356991087532
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)246 mm (9.7 inches)85%low
February Weather4°C (40°F)260 mm (10.2 inches)84%moderate
March Weather7°C (45°F)189 mm (7.4 inches)85%moderate
April Weather10°C (50°F)166 mm (6.5 inches)83%high
May Weather14°C (57°F)86 mm (3.4 inches)83%very high
June Weather17°C (63°F)75 mm (3.0 inches)83%very high
July Weather20°C (68°F)10 mm (0.4 inches)82%very high
August Weather20°C (69°F)13 mm (0.5 inches)74%very high
September Weather17°C (63°F)111 mm (4.4 inches)71%high
October Weather11°C (52°F)199 mm (7.8 inches)81%moderate
November Weather7°C (46°F)260 mm (10.2 inches)87%moderate
December Weather5°C (40°F)273 mm (10.7 inches)87%low

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