Dallas Weather in May

The weather at Dallas, Texas often turns wet and stormy during May. This month has the greatest rainfall, highest humidity and most thunderstorms.

This page gives detailed information on the typical May weather for Dallas.

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The temperature, precipitation and wind speed numbers here are historical averages based on climate data gathered at the Dallas Love Field Airport, located a few miles from downtown Dallas. The rest of the measurements are averages from the nearby Dallas - Fort Worth International Airport.

Temperature Weather iconTemperature

84 °F May average high 29 °C
65 °F May average low 19 °C

In most years, Dallas averages a daily maximum temperature for May that's between 82 and 87 degrees Fahrenheit (28 to 30 degrees Celsius). The minimum temperature usually falls between 63 and 68 °F (17 to 20 °C).

The days at Dallas continue to warm quickly during May. By the end of the month, the temperature has climbed around 8 °F (4 °C) above what it was at the start.

23 days 80 °F max. or more (27 °C)
23 days 70 °F min. or less (21 °C)

The temperature rises nearly every day in May to over 70 °F (21 °C) at Dallas. The city averages 6 days this month when the thermometer reaches into the 90s °F (over 32 °C). Temperatures of 100 °F (38 °C) or above occur about once a decade here during May.

The thermometer dips to 60 °F (16 °C) or below on an average of 6 nights. Most years May does not get as cold as 50 °F (10 °C).

Rainy Weather iconRain

4.9 in total precipitation 125 mm
10 days of rain

Half the time, Dallas receives 3 to 7 inches (67 to 177 mm) of rainfall in May. One in four years has drier weather, while another one in four is wetter. May is the rainiest month for Dallas.

Sunny Weather iconSun

57 % sunshine
8 days clear skies

The sun's rays reach the ground in Dallas during 57 percent of daylight hours on average in May, for a total of 245 hours in the month. Typically on 8 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in May at Dallas lasts for 13 hours and 51 minutes a day on average. The shortest day of the month is the 1st with 13 hours and 29 minutes of daylight. By the end of the month, the days have lengthened to 14:10 from sunrise to sunset. These durations can vary by a minute or two from year to year.

Humid Weather iconHumidity

70 % May average humidity

The relative humidity in Dallas during May usually peaks at 87 percent in the morning then drops to 53 percent by mid afternoon. May is the most humid time of year for Dallas.

Local Time12 am3 am6 am9 am12 pm3 pm6 pm9 pm
Humidity % 78 83 87 72 59 53 56 71

Windy Weather iconWind

10.9 mph May wind speed average 17.5 kph

May is windier than most other months in Dallas.

Stormy Weather iconStorms

3 days rainfall of 0.5 inches (13 mm) or more
8 days with thunderstorms in May

Dallas gets thunderstorms more frequently during May than any other month.


These weather data are long-term historical averages provided by the National Climatic Data Center of the United States. The temperature and precipitation numbers are 1981-2010 normals while the humidity and thunderstorm statistics are 1961-1990 normals.

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