Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The arrival of December corresponds with a minor reduction in the average high-temperature, down from November's agreeable 68.9°F (20.5°C) to an enjoyable 61.5°F (16.4°C). In Castle Hills, the average low-temperature during the month of December is a chilly 46.2°F (7.9°C).Humidity
The average relative humidity in December in Castle Hills is 69%.Rainfall
In December, in Castle Hills, the rain falls for 11.3 days. Throughout December, 1.14" (29mm) of precipitation is accumulated. Throughout the year, there are 155.9 rainfall days, and 22.76" (578mm) of precipitation is accumulated.Snowfall
In Castle Hills, snow does not fall in March through December.Daylight
December has the shortest days of the year in Castle Hills, with an average of 10h and 18min of daylight.On the first day of December, sunrise is at 7:11 am and sunset at 5:34 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 5:46 pm CST.
Sunshine
The month with the least sunshine is December, with an average of 5.2h of sunshine.UV index
The month with the lowest UV index in Castle Hills, Texas, is December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: A typical high UV index of 3 in December suggests the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December in Castle Hills?
What is the average humidity in December in Castle Hills?
How much does it rain in Castle Hills in December?
When it does not snow in Castle Hills?
Does it snow in Castle Hills in December?
What is the month with the shortest days in Castle Hills?
What is the average length of the day in December in Castle Hills?
When is the sunrise / sunset in December in Castle Hills?
What is the month with the least sunshine in Castle Hills?
How many hours of sunshine does Castle Hills have in December?
When is the lowest UV index in Castle Hills?
How high is the UV index in December in Castle Hills?
Average temperature in December
Castle Hills, TX
- Average high temperature in December: 61.5°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 December: 46.2°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).
Average pressure in December
Castle Hills, TX
- Average pressure in December: 30.11"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).
Average wind speed in December
Castle Hills, TX
- Average wind speed in December: 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).
Average humidity in December
Castle Hills, TX
- Average humidity in December: 69%
The month with the highest relative humidity is May (73%).
The month with the lowest relative humidity is August (59%).
Average rainfall in December
Castle Hills, TX
- Average rainfall in December: 1.14"
The wettest month (with the highest rainfall) is May (3.78").
The driest month (with the least rainfall) is February (0.94").
Average rainfall days in December
Castle Hills, TX
- Average rainfall days in December: 11.3 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).
Average snowfall in December
Castle Hills, TX
- Average snowfall in December: 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").
Average snowfall days in December
Castle Hills, TX
- Average snowfall days in December: 0.1 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).
Average daylight in December /
Average sunshine in December
Castle Hills, TX
- Average daylight in December: 10h and 2min
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 December: 5h and 1min
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).
Average sunshine days in December
Castle Hills, TX
- Average sunshine days in December: 18 days
The month with the most sunshine days is January (20 days).
The month with the least sunshine days is May (10.2 days).
Average UV index in December
Castle Hills, TX
- Average UV index in December: 3
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).
Average cloud cover in December
Castle Hills, TX
- Average cloud cover in December: 42
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in December
Castle Hills, TX
- Average visibility in December: 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).
Castle Hills, Texas, USA
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