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
December's onset brings a negligible change in high-temperatures, falling from a pleasant 68°F (20°C) in November to a moderate 60.6°F (15.9°C). Zachary's average low-temperature in December is measured at a frosty 45.9°F (7.7°C).Humidity
The months with the highest humidity are February and December, with an average relative humidity of 82%.Rainfall
In Zachary, in December, during 13.4 rainfall days, 2.56" (65mm) of precipitation is typically accumulated. Throughout the year, there are 175 rainfall days, and 28.74" (730mm) of precipitation is accumulated.Snowfall
Months with snowfall are January and December. The months with the most snowfall are January and December, with an average 0.2" (5mm) of accumulated snow.Daylight
The month with the shortest days is December, with an average of 10h and 12min of daylight.On the first day of the month, sunrise is at 6:44 am and sunset at 5:03 pm. On the last day of December, sunrise is at 7:01 am and sunset at 5:14 pm CST.
Sunshine
With an average of 5h of sunshine, December has the least sunshine of the year.UV index
The months with the lowest UV index in Zachary, Louisiana, are January and December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.Note: The UV index of 3 during December translates into the following guidance:
Exercise prevention - Precautions against solar damage are endorsed. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average December temperature in Zachary?
What are the most humid months?
What is the average humidity in December?
How many days does it rain in December?
What is the snowiest month?
When does it start to snow?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
What is the month with the least sunshine?
How long on average sun shines in December in Zachary?
When is the lowest UV index?
How high is the UV index in December?
Average temperature in December
Zachary, LA
- Average high temperature in December: 60.6°F
The warmest month (with the highest average high temperature) is July (91.9°F).
The month with the lowest average high temperature is January (58.3°F).
- Average low temperature in December: 45.9°F
The month with the highest average low temperature is August (73.4°F).
The coldest month (with the lowest average low temperature) is January (41.9°F).
Average pressure in December
Zachary, LA
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The months with the lowest atmospheric pressure are June and August (29.96"Hg).
Average wind speed in December
Zachary, LA
- Average wind speed in December: 6.3mph
The windiest month (with the highest average wind speed) is February (6.6mph).
The calmest month (with the lowest average wind speed) is July (4.3mph).
Average humidity in December
Zachary, LA
- Average humidity in December: 82%
The months with the highest relative humidity are February and December (82%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Zachary, LA
- Average rainfall in December: 2.56"
The wettest month (with the highest rainfall) is August (3.66").
The driest month (with the least rainfall) is November (1.5").
Average rainfall days in December
Zachary, LA
- Average rainfall days in December: 13.4 days
The month with the highest number of rainy days is August (22.3 days).
The month with the least rainy days is November (8.5 days).
Average snowfall in December
Zachary, LA
- Average snowfall in December: 0.2"
The months with the highest snowfall are January and December (0.2").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Zachary, LA
- 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
Zachary, LA
- 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: 5h and 0min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in December
Zachary, LA
- Average sunshine days in December: 15.5 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (6.8 days).
Average UV index in December
Zachary, LA
- Average UV index in December: 3
The months with the highest UV index are May, June and July (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in December
Zachary, LA
- Average cloud cover in December: 49
The months with the most cloud cover are February and December (Cloud cover 49).
The month with the least cloud cover is October (Cloud cover 29).
Average visibility in December
Zachary, LA
- Average visibility in December: 5mi
The months with the highest visibility are October and November (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September and December (5mi).
Zachary, Louisiana, USA
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