May weather forecast
Dallas, TX

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Dallas, Texas, modern city skyscrapers, just before sunset
Dallas, Texas, modern city skyscrapers, just before sunset

Weather in May

The May weather in Dallas welcomes summer's onset with warmer temperatures, the highest annual rainfall, and an increase in relative humidity. Transitioning from April's environment, the reduced wind speed in May brings a gentle breeze, heralding the relaxed winds of June. Rainfall peaks dramatically at 4.13" (105mm), making May the wettest month - a dissipation in cloud cover and rainfall follows in the coming months. Although the frequency of rainfall is considerably high, abundant sunshine and diminishing cloud cover offer a lovely climate for exploration and outdoor activities. Prepare for a mix of sun-soaked days and balmy nights in the city.

Temperature

May's arrival coincides with a marginal rise in the average high-temperature, moving from April's moderately hot 75°F (23.9°C) to a still warm 82°F (27.8°C). During the nights in May, the temperature averages to a refreshing 64.8°F (18.2°C).

Heat index

In May, the average heat index is computed to be a hot 87.8°F (31°C). Enduring exposure and unrelenting activity might cause a state of weariness, potentially leading to heat cramps.
When assessing, remember that heat index measurements are for light winds and shaded spots. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'apparent temperature' or 'feels like', binds temperature metrics with humidity values to give a sense of the actual warmth. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's 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

In Dallas, snow does not fall in March through October.

Daylight

In Dallas, the average length of the day in May is 13h and 52min.
On the first day of May in Dallas, sunrise is at 6:39 am and sunset at 8:09 pm. On the last day of the month, sunrise is at 6:19 am and sunset at 8:30 pm CDT.

Sunshine

The average sunshine in May in Dallas is 8.9h.

UV index

May through August, with an average maximum UV index of 7, are months with the highest UV index in Dallas. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for average individuals.
Note: In May, the maximum UV index of 7 transforms into these recommendations:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
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Frequently asked questions

What are May temperatures in Dallas?

In Dallas, 82°F (27.8°C) is the average high-temperature and 64.8°F (18.2°C) is the average low-temperature during May. The average heat index (a.k.a. 'felt air temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in May is computed to be 87.8°F (31°C).

What is the most humid month in Dallas?

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

What is the average humidity in May in Dallas?

The average relative humidity in May in Dallas is 72%.

What is the wettest month in Dallas?

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.

How many days does it rain in May in Dallas?

In Dallas, Texas, during May, the rain falls for 15.8 days and regularly aggregates up to 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?

The average day length in May in Dallas is 13h and 52min.

When is the sunrise / sunset in May in Dallas?

In May, on the first day of the month, sunrise is at 6:39 am and sunset at 8:09 pm. On the last day of the month, in Dallas, sunrise is at 6:19 am and sunset at 8:30 pm CDT.

How long on average sun shines in May in Dallas?

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

When is the highest UV index in Dallas?

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

What is the UV index reading in May in Dallas?

The average daily maximum UV index in May in Dallas, Texas, is 7. A UV Index reading of 6 to 7 represents a high hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Dallas, TX

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).

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Average pressure in May
Dallas, TX

Average pressure in May - Dallas, TX
  • Average pressure in May: 29.92"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in May
Dallas, TX

Average wind speed in May - Dallas, TX
  • Average wind speed in May: 8.9mph

The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest month (with the lowest average wind speed) is September (6.6mph).

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Average humidity in May
Dallas, TX

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%).

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Average rainfall in May
Dallas, TX

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 least rainfall) is February (1.61").

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Average rainfall days in May
Dallas, TX

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 least rainy days is January (6.7 days).

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Average snowfall in May
Dallas, TX

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

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

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Average snowfall days in May
Dallas, TX

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).
The months with the least snowfall days are March, April, May, June, July, August, September and October (0 days).

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Average daylight in May /
Average sunshine in May
Dallas, TX

Average daylight in May / Average sunshine in May - Dallas, TX
  • Average daylight in May: 13h and 5min

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in May: 8h and 5min

The month with the most sunshine is August (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).

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Average sunshine days in May
Dallas, TX

Average sunshine days in May - Dallas, TX
  • Average sunshine days in May: 12.2 days

The month with the most sunshine days is January (23.2 days).
The month with the least sunshine days is May (12.2 days).

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Average UV index in May
Dallas, TX

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

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

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Average cloud cover in May
Dallas, TX

Average cloud cover in May - Dallas, TX
  • Average cloud cover in May: 35

The months with the most cloud cover are February and March (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 20).

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Average visibility in May
Dallas, TX

Average visibility in May - Dallas, TX
  • Average visibility in May: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Dallas, Texas, USA

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