May weather forecast
Grapevine, TX

Weather in May

May, the last month of the spring in Grapevine, is another warm month, with an average temperature fluctuating between 64.6°F (18.1°C) and 82.2°F (27.9°C).

Temperature

In Grapevine, Texas, the average high-temperature in May slightly increases from a warm 75°F (23.9°C) in April to a still moderately hot 82.2°F (27.9°C). The average low-temperature, in Grapevine, is 64.6°F (18.1°C).

Heat index

The average heat index in May is evaluated at a tropical 87.8°F (31°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. 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', 'felt air temperature', or 'real feel', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is individual, with diverse people perceiving weather differently for numerous reasons (clothing, differences in body mass, height, and shape, pregnancy), and activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index 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 71%.

Rainfall

May is the month with the most rainfall in Grapevine. Rain falls for 10.4 days and accumulates 1.34" (34mm) of precipitation.

Snowfall

April through December are months without snowfall in Grapevine.

Daylight

In May, the average length of the day in Grapevine, Texas, is 13h and 52min.
On the first day of May, sunrise is at 6:40 am and sunset at 8:10 pm. On the last day of the month, sunrise is at 6:20 am and sunset at 8:31 pm CDT.

Sunshine

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

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for average individuals.
Note: In May, the average maximum UV index of 7 translate into the following recommendations:
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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in May in Grapevine?

In May, in Grapevine, the average high-temperature is 82.2°F (27.9°C), and the average low-temperature is 64.6°F (18.1°C). in May, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which represents the influence of relative humidity on air temperature, is evaluated at 87.8°F (31°C).

What is the most humid month in Grapevine?

May is the most humid month in Grapevine, Texas, with an average relative humidity of 71%.

What is the average humidity in May in Grapevine?

In May, the average relative humidity in Grapevine, Texas, is 71%.

What is the wettest month in Grapevine?

The month with the most rainfall is May, when the rain falls for 10.4 days and typically aggregates up to 1.34" (34mm) of precipitation.

How much does it rain in Grapevine in May?

In May, in Grapevine, the rain falls for 10.4 days. Throughout May, 1.34" (34mm) of precipitation is accumulated.

When it does not snow in Grapevine?

In Grapevine, Texas, snow does not fall in April through December.

How many hours of daylight does Grapevine have in May?

In Grapevine, the average day length in May is 13h and 52min.

When are sunrise and sunset in May in Grapevine?

In May, on the first day of the month, sunrise is at 6:40 am and sunset at 8:10 pm. On the last day of the month, in Grapevine, sunrise is at 6:20 am and sunset at 8:31 pm CDT.

How long on average sun shines in May in Grapevine?

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

What is the month with the highest UV index in Grapevine?

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

How high is the UV index in May in Grapevine?

In May, the average daily maximum UV index in Grapevine is 7. A UV Index value of 6 to 7 symbolizes a high hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Grapevine, TX

Average temperature in May - Grapevine, TX
  • Average high temperature in May: 82.2°F

The warmest month (with the highest average high temperature) is August (96.4°F).
The month with the lowest average high temperature is January (54.5°F).

  • Average low temperature in May: 64.6°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 (38.8°F).

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Average pressure in May
Grapevine, TX

Average pressure in May - Grapevine, 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 (29.9"Hg).

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Average wind speed in May
Grapevine, TX

Average wind speed in May - Grapevine, TX
  • Average wind speed in May: 9.1mph

The windiest months (with the highest average wind speed) are March and April (10.1mph).
The calmest month (with the lowest average wind speed) is September (6.7mph).

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Average humidity in May
Grapevine, TX

Average humidity in May - Grapevine, TX
  • Average humidity in May: 71%

The month with the highest relative humidity is May (71%).
The month with the lowest relative humidity is August (54%).

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Average rainfall in May
Grapevine, TX

Average rainfall in May - Grapevine, TX
  • Average rainfall in May: 1.34"

The wettest month (with the highest rainfall) is May (1.34").
The driest month (with the least rainfall) is February (0.39").

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Average rainfall days in May
Grapevine, TX

Average rainfall days in May - Grapevine, TX
  • Average rainfall days in May: 10.4 days

The month with the highest number of rainy days is September (10.5 days).
The month with the least rainy days is January (4.5 days).

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Average snowfall in May
Grapevine, TX

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

The month with the highest snowfall is February (0.16").
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0").

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Average snowfall days in May
Grapevine, TX

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

The month with the highest number of snowfall days is February (0.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

Average daylight in May / Average sunshine in May - Grapevine, TX
  • Average daylight in May: 13h and 52min

The month with the longest days is June (Average daylight: 14h and 17min).
The month with the shortest days is December (Average daylight: 10h and 1min).

  • Average sunshine in May: 8h and 54min

The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

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Average sunshine days in May
Grapevine, TX

Average sunshine days in May - Grapevine, TX
  • Average sunshine days in May: 17.2 days

The month with the most sunshine days is January (25.1 days).
The month with the least sunshine days is September (16.8 days).

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Average UV index in May
Grapevine, TX

Average UV index in May - Grapevine, 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
Grapevine, TX

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

The month with the most cloud cover is March (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 19).

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Average visibility in May
Grapevine, TX

Average visibility in May - Grapevine, 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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