Dallas
Texas, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Dallas, TX

Dallas, Texas, modern city skyscrapers viewed from above, just before sunset
Dallas, Texas, modern city skyscrapers viewed from above, just before sunset
May, the last month of the spring, in Dallas, is another warm month, with temperature in the range of an average high of 82°F (27.8°C) and an average low of 64.8°F (18.2°C).

Temperature

In Dallas, the average high-temperature in May marginally rises, from 75°F (23.9°C) in April, to a still moderately hot 82°F (27.8°C). The average low-temperature, in Dallas, Texas, is 64.8°F (18.2°C).

Heat index

The average heat index is calculated to a hot 86.9°F (30.5°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'apparent temperature', 'real feel', or 'felt air temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, wind, differences in body mass, height, and shape). Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

The most humid month is May, with an average relative humidity of 72%.

Rainfall

The month with the most rainfall in Dallas, Texas, is May when the rain falls for 15.8 days and typically aggregates up to 4.13" (105mm) of precipitation.

Snowfall

March through October are months without snowfall in Dallas.

Daylight

The average length of the day is 13.9h.

Sunshine

In Dallas, Texas, the average sunshine is 8.9h.

UV index

Months with the highest UV index are May through August, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from the exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 7 transform into the following instructions:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in May in Dallas?

The average high-temperature, in May, in Dallas, is 82°F (27.8°C), while the average low-temperature is 64.8°F (18.2°C). In May, the average heat index (a.k.a. 'apparent temperature', 'feels like'), that calculates temperature value influenced by the moisture in the air, is estimated at 86.9°F (30.5°C).

What is the most humid month in Dallas?

The most humid month in Dallas is May, with an average relative humidity of 72%.

What is the average humidity in May in Dallas?

In Dallas, Texas, the average relative humidity in May is 72%.

How many days does it rain in May in Dallas?

In May, in Dallas, Texas, the rain falls for 15.8 days. Throughout May, 4.13" (105mm) of precipitation is accumulated.

What is the wettest month in Dallas?

May is the month with the most rainfall in Dallas. Rain falls for 15.8 days and accumulates 4.13" (105mm) of precipitation.

When it does not snow in Dallas?

In Dallas snow does not fall in March through October.

How many hours of daylight does Dallas have in May?

In May, the average length of the day in Dallas is 13.9h.

How long on average sun shines in May in Dallas?

In May, the average sunshine in Dallas is 8.9h.

When is the highest UV index in Dallas?

May through August, with an average maximum UV index of 7, are months with the highest UV index.

What is the UV index reading in May in Dallas?

In May, the average daily maximum UV index in Dallas is 7. A UV Index value of 6 to 7 symbolizes a high hazard to health from the exposure to the Sun's UV radiation.
Average temperature in May - Dallas, TX
  • Average high temperature in May: 82°F

The warmest month (with the highest average high temperature) is August (96.1°F).
The month with the lowest average high temperature is January (54.3°F).

  • Average low temperature in May: 64.8°F

The month with the highest average low temperature is August (77.2°F).
The coldest month (with the lowest average low temperature) is January (39.2°F).

Average humidity in May - Dallas, TX
  • Average humidity in May: 72%

The month with the highest relative humidity is May (72%).
The month with the lowest relative humidity is August (55%).

Average rainfall in May - Dallas, TX
  • Average rainfall in May: 4.13"

The wettest month (with the highest rainfall) is May (4.13").
The driest month (with the lowest rainfall) is February (1.61").

Average rainfall days in May - Dallas, TX
  • Average rainfall days in May: 15.8 days

The month with the highest number of rainy days is May (15.8 days).
The month with the lowest number of rainy days is January (6.7 days).

Average snowfall in May - Dallas, TX
  • Average snowfall in May: 0"

The month with the highest snowfall is February (0.43").
Months with the lowest snowfall are March, April, May, June, July, August, September and October (0").

Average snowfall days in May - Dallas, TX
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (1.2 days).
Months with the lowest number of snowfall days are March, April, May, June, July, August, September and October (0 days).

Average daylight in May / Average sunshine in May - Dallas, TX
  • Average daylight in May: 13.9h

The month with the longest days is June (Average daylight: 14.3h).
The month with shortest days is December (Average daylight: 10h).

  • Average sunshine in May: 8.9h

The month with most sunshine is August (Average sunshine: 11.1h).
The month with least sunshine is December (Average sunshine: 5.6h).

Average UV index in May - Dallas, TX
  • Average UV index in May: 7

Months with the highest UV index are May, June, July and August (UV index 7).
Months with the lowest UV index are January and December (UV index 3).