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
As November transitions into December, Justin sees a drop in the average high-temperature, transitioning from an enjoyable 64°F (17.8°C) to a fresh 55°F (12.8°C). Justin experiences a nighttime temperature average of 40.5°F (4.7°C) during December.Humidity
In Justin, the average relative humidity in December is 67%.Rainfall
In December, the rain falls for 8.5 days. Throughout December, 1.69" (43mm) of precipitation is accumulated. Throughout the year, there are 135.5 rainfall days, and 29.45" (748mm) of precipitation is accumulated.Snowfall
Months with snowfall in Justin are January through March, November and December. In December, it is snowing for 0.5 days. Throughout December, 0.12" (3mm) of snow is accumulated. Throughout the year, in Justin, there are 2.6 snowfall days, and 1.46" (37mm) of snow is accumulated.Daylight
With an average of 10h and 0min of daylight, December has the shortest days of the year.On the first day of December in Justin, sunrise is at 7:14 am and sunset at 5:22 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 5:32 pm CST.
Sunshine
The month with the least sunshine is December, with an average of 5.8h of sunshine.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: An average UV index of 3 in December transforms into this advice:
Take precautions - Protection against sunburn is recommended. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Frequently asked questions
What is the average December temperature in Justin?
What is the average humidity in December in Justin?
How many days does it rain in December in Justin?
How much does it snow in Justin in December?
What is the month with the shortest days in Justin?
What is the average length of the day in December in Justin?
When is the sunrise / sunset in December in Justin?
What is the month with the least sunshine in Justin?
How long on average sun shines in December in Justin?
When is the lowest UV index in Justin?
What is the UV index reading in December in Justin?
Average temperature in December
Justin, TX
- Average high temperature in December: 55°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 (54.3°F).
- Average low temperature in December: 40.5°F
The month with the highest average low temperature is August (75.6°F).
The coldest month (with the lowest average low temperature) is January (38.1°F).
Average pressure in December
Justin, TX
- Average pressure in December: 30.13"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).
Average wind speed in December
Justin, TX
- Average wind speed in December: 8.8mph
The windiest months (with the highest average wind speed) are March and April (10.4mph).
The calmest month (with the lowest average wind speed) is September (6.8mph).
Average humidity in December
Justin, TX
- Average humidity in December: 67%
The month with the highest relative humidity is May (73%).
The month with the lowest relative humidity is August (55%).
Average rainfall in December
Justin, TX
- Average rainfall in December: 1.69"
The wettest months (with the highest rainfall) are May and October (3.9").
The driest month (with the least rainfall) is January (1.46").
Average rainfall days in December
Justin, TX
- Average rainfall days in December: 8.5 days
The month with the highest number of rainy days is May (14.7 days).
The month with the least rainy days is January (6.1 days).
Average snowfall in December
Justin, TX
- Average snowfall in December: 0.12"
The month with the highest snowfall is February (0.98").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Justin, TX
- Average snowfall days in December: 0.5 days
The month with the highest number of snowfall days is February (1.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Justin, TX
- Average daylight in December: 10h and 0min
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 December: 5h and 5min
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 48min).
Average sunshine days in December
Justin, TX
- Average sunshine days in December: 20.7 days
The month with the most sunshine days is January (23.5 days).
The months with the least sunshine days are May and September (14.5 days).
Average UV index in December
Justin, TX
- Average UV index in December: 3
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in December
Justin, TX
- Average cloud cover in December: 34
The month with the most cloud cover is March (Cloud cover 38).
The month with the least cloud cover is August (Cloud cover 19).
Average visibility in December
Justin, 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).
Justin, Texas, USA
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