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 transition into December involves a small decrease in the average high-temperature, dipping slightly from an agreeable 68.7°F (20.4°C) in November to a refreshing 61.3°F (16.3°C). Nightly temperatures drop to an average low of 46°F (7.8°C) in December.Humidity
In Willis, the average relative humidity in December is 79%.Rainfall
In December, the rain falls for 13.5 days. Throughout December, 3.03" (77mm) of precipitation is accumulated. Throughout the year, there are 176.1 rainfall days, and 34.33" (872mm) of precipitation is accumulated.Snowfall
January and December are months with snowfall. December is the first month it typically snows. Throughout December, in the average 0.1 snowfall days, it receives 0.12" (3mm) of snow. Throughout the year, there are 0.6 snowfall days, and 0.28" (7mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 10h and 12min of daylight.On the first day of the month, sunrise is at 7:01 am and sunset at 5:20 pm. On the last day of December, in Willis, sunrise is at 7:18 am and sunset at 5:31 pm CST.
Sunshine
December has the least sunshine of the year, with an average of 4.9h of sunshine.UV index
The month with the lowest UV index is December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: In December, a regular UV index of 3 translates into these guidelines:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Opt for tightly woven and loose clothing to enhance protection from the Sun. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December?
What is the average humidity in December in Willis?
How many days does it rain in December?
When does it start snowing?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
What is the month with the least sunshine?
How long on average sun shines in December?
When is the lowest UV index?
How high is the UV index in December?
Average temperature in December
Willis, TX
- Average high temperature in December: 61.3°F
The warmest month (with the highest average high temperature) is August (95.5°F).
The month with the lowest average high temperature is January (59.2°F).
- Average low temperature in December: 46°F
The months with the highest average low temperature are July and August (74.8°F).
The coldest month (with the lowest average low temperature) is January (42.8°F).
Average pressure in December
Willis, TX
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Willis, TX
- Average wind speed in December: 6.5mph
The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is September (5.1mph).
Average humidity in December
Willis, TX
- Average humidity in December: 79%
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is August (69%).
Average rainfall in December
Willis, TX
- Average rainfall in December: 3.03"
The wettest month (with the highest rainfall) is May (4.02").
The driest month (with the least rainfall) is November (1.97").
Average rainfall days in December
Willis, TX
- Average rainfall days in December: 13.5 days
The month with the highest number of rainy days is September (18.2 days).
The months with the least rainy days are January and October (12.1 days).
Average snowfall in December
Willis, TX
- Average snowfall in December: 0.12"
The month with the highest snowfall is January (0.16").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Willis, TX
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is January (0.3 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
Willis, TX
- Average daylight in December: 10h and 1min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days in December
Willis, TX
- Average sunshine days in December: 15.1 days
The months with the most sunshine days are January and October (16.6 days).
The month with the least sunshine days is September (9.9 days).
Average UV index in December
Willis, 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
Willis, TX
- Average cloud cover in December: 49
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
Willis, TX
- Average visibility in December: 5mi
The months with the highest visibility are January, August and October (6mi).
The months with the lowest visibility are February, March, April, May, June, July, September, November and December (5mi).
Willis, Texas, USA
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