May weather forecast
Castle Hills, TX

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Weather in May

May, the last month of the spring in Castle Hills, is another warm month, with an average temperature fluctuating between 66.7°F (19.3°C) and 85.1°F (29.5°C).

Temperature

A subtle rise in the average high-temperature is observed during May, adjusting from a moderately hot 79°F (26.1°C) in April to a still warm 85.1°F (29.5°C). Castle Hills observes an average low-temperature of 66.7°F (19.3°C) during May nights.

Heat index

For May, the heat index is calculated to be a sweltering 95°F (35°C). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.
Heat index readings emphasize conditions of light breezes and shaded spots. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is an estimation of the warmth sensation when considering humidity levels. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. 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 extremely vital to babies and toddlers. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
Perspiration, followed by sweat evaporation, is the human body's chief method to maintain a balanced temperature. With an abundance of moisture present in the air, the process of evaporation becomes less effective, and the body fails to cool down as it should, leading to the sensation of overheating. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

Humidity

The most humid month in Castle Hills is May, with an average relative humidity of 73%.

Rainfall

May is the month with the most rainfall. Rain falls for 18 days and accumulates 3.78" (96mm) of precipitation.

Snowfall

In Castle Hills, snow does not fall in March through December.

Daylight

In May, the average length of the day is 13h and 38min.
On the first day of the month, sunrise is at 6:51 am and sunset at 8:11 pm. On the last day of May, in Castle Hills, sunrise is at 6:34 am and sunset at 8:29 pm CDT.

Sunshine

In Castle Hills, the average sunshine in May is 7.8h.

UV index

The average daily maximum UV index in May is 6. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A maximum UV index of 6 in May translates into the following recommendations:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
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Frequently asked questions

Is it hot in Castle Hills during May?

An average high-temperature, in May, in Castle Hills, is 85.1°F (29.5°C) and the average low-temperature is 66.7°F (19.3°C). In May, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines relative humidity and air temperature, is calculated to be 95°F (35°C).

What is the most humid month in Castle Hills?

May is the most humid month, with an average relative humidity of 73%.

What is the average humidity in May in Castle Hills?

In Castle Hills, the average relative humidity in May is 73%.

What is the rainiest month in Castle Hills?

May is the month with the most rainfall in Castle Hills, Texas. Rain falls for 18 days and accumulates 3.78" (96mm) of precipitation.

How much does it rain in Castle Hills in May?

In Castle Hills, Texas, in May, during 18 rainfall days, 3.78" (96mm) of precipitation is typically accumulated.

When it does not snow in Castle Hills?

March through December are months without snowfall.

How many hours of daylight does Castle Hills have in May?

In Castle Hills, the average day length in May is 13h and 38min.

What time are sunrise and sunset in May in Castle Hills?

On the first day of May, sunrise is at 6:51 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 6:34 am and sunset at 8:29 pm CDT.

How many hours of sunshine does Castle Hills have in May?

The average sunshine duration in May in Castle Hills is 7.8h.

What is the UV index intensity in May in Castle Hills?

The average daily maximum UV index in May in Castle Hills is 6. A UV Index reading of 6 to 7 represents a high health threat 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
Castle Hills, TX

Average temperature in May - Castle Hills, TX
  • Average high temperature in May: 85.1°F

The warmest month (with the highest average high temperature) is August (96.6°F).
The month with the lowest average high temperature is January (61.2°F).

  • Average low temperature in May: 66.7°F

The month with the highest average low temperature is August (75°F).
The coldest month (with the lowest average low temperature) is January (44.2°F).

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Average pressure in May
Castle Hills, TX

Average pressure in May - Castle Hills, TX
  • Average pressure in May: 29.9"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

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Average wind speed in May
Castle Hills, TX

Average wind speed in May - Castle Hills, TX
  • Average wind speed in May: 8.8mph

The windiest months (with the highest average wind speed) are February, March, April and May (8.8mph).
The calmest month (with the lowest average wind speed) is September (6.4mph).

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Average humidity in May
Castle Hills, TX

Average humidity in May - Castle Hills, TX
  • Average humidity in May: 73%

The month with the highest relative humidity is May (73%).
The month with the lowest relative humidity is August (59%).

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Average rainfall in May
Castle Hills, TX

Average rainfall in May - Castle Hills, TX
  • Average rainfall in May: 3.78"

The wettest month (with the highest rainfall) is May (3.78").
The driest month (with the least rainfall) is February (0.94").

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Average rainfall days in May
Castle Hills, TX

Average rainfall days in May - Castle Hills, TX
  • Average rainfall days in May: 18 days

The month with the highest number of rainy days is May (18 days).
The months with the least rainy days are January and August (9.3 days).

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Average snowfall in May
Castle Hills, TX

Average snowfall in May - Castle Hills, TX
  • Average snowfall in May: 0"

The months with the highest snowfall are January and February (0.08").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").

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Average snowfall days in May
Castle Hills, TX

Average snowfall days in May - Castle Hills, TX
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (0.4 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).

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Average daylight in May /
Average sunshine in May
Castle Hills, TX

Average daylight in May / Average sunshine in May - Castle Hills, TX
  • Average daylight in May: 13h and 4min

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

  • Average sunshine in May: 7h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).

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Average sunshine days in May
Castle Hills, TX

Average sunshine days in May - Castle Hills, TX
  • Average sunshine days in May: 10.2 days

The month with the most sunshine days is January (20 days).
The month with the least sunshine days is May (10.2 days).

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Average UV index in May
Castle Hills, TX

Average UV index in May - Castle Hills, TX
  • Average UV index in May: 6

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

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Average cloud cover in May
Castle Hills, TX

Average cloud cover in May - Castle Hills, TX
  • Average cloud cover in May: 48

The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 25).

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Average visibility in May
Castle Hills, TX

Average visibility in May - Castle Hills, 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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Castle Hills, Texas, USA

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