May Weather in Dallas, United States

Last updated: June 24, 2025

In May, the average temperature in Dallas, United States is a pleasant 21°C (71°F). Visitors can expect a range from a cool 5°C (41°F) to a warm 34°C (94°F). During this month, 106 mm (4.2 in) of precipitation typically falls over 11 days, contributing to an average humidity of 81%.

May Temperature in Dallas

In May in Dallas, the average temperature is 21°C (71°F). The maximum can reach 34°C (94°F), while the minimum can drop as low as 5°C (41°F). This makes it an ideal time for travelers to enjoy a range of outdoor activities, from warm days to cool evenings.

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

The chart illustrates May temperature patterns in Dallas, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Dallas, May typically has an average temperature of 21°C (71°F), with highs reaching up to 34°C (94°F) and lows dropping to around 5°C (41°F).

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

May Precipitation in Dallas

In Dallas in May, the precipitation amount is 106 mm (4.2 in) spread over a duration of 11 days.

May Precipitation Trends in Dallas

The chart displays monthly precipitation patterns in Dallas, 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 Dallas, May typically receives around 106 mm (4.2 inches) of precipitation spread over approximately 11 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 Dallas

In Dallas in May, humidity is 81%. With an average temperature of 21°C (71°F), this humidity feels like a warm, enveloping blanket that makes traveling feel both refreshing and slightly heavy, often leading to a sticky sensation that can quickly deplete your energy.

May Average Humidity in Dallas

This chart illustrates the average monthly humidity levels in Dallas, 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 Dallas 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 Dallas

In Dallas 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 Dallas.

Maximum UV Index Levels in Dallas for May

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

Data source: Dallas 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 Dallas Compares to Other Months

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

This table compares monthly weather conditions in Dallas, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (45°F)	111 mm (4.4 inches)	86%	moderate
February Weather	10°C (51°F)	159 mm (6.3 inches)	84%	high
March Weather	13°C (56°F)	138 mm (5.4 inches)	83%	very high
April Weather	16°C (62°F)	134 mm (5.3 inches)	81%	very high
May Weather	21°C (71°F)	106 mm (4.2 inches)	81%	extreme
June Weather	24°C (76°F)	133 mm (5.3 inches)	81%	extreme
July Weather	26°C (79°F)	123 mm (4.9 inches)	83%	extreme
August Weather	25°C (78°F)	144 mm (5.7 inches)	81%	very high
September Weather	23°C (74°F)	112 mm (4.4 inches)	82%	very high
October Weather	18°C (65°F)	131 mm (5.1 inches)	78%	very high
November Weather	11°C (52°F)	86 mm (3.4 inches)	86%	high
December Weather	9°C (48°F)	137 mm (5.4 inches)	89%	moderate