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 Chatham enters December, the average high-temperature subtly lowers from the a refreshing 64.6°F (18.1°C) of November to a mild 56.5°F (13.6°C). In December, Chatham experiences an average nighttime temperature of 42.4°F (5.8°C).Humidity
The months with the highest humidity are February and December, with an average relative humidity of 82%.Rainfall
In Chatham, in December, during 11.8 rainfall days, 3.11" (79mm) of precipitation is typically accumulated. In Chatham, Louisiana, during the entire year, the rain falls for 153.4 days and collects up to 35.08" (891mm) of precipitation.Snowfall
Months with snowfall are January, February and December. December is the first month it typically snows. Throughout December, in the average 0.1 snowfall days, it receives 0.08" (2mm) of snow. Throughout the year, there are 1.6 snowfall days, and 0.35" (9mm) of snow is accumulated.Daylight
The month with the shortest days in Chatham is December, with an average of 10h and 6min of daylight.On the first day of December in Chatham, sunrise is at 6:53 am and sunset at 5:04 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 5:15 pm CST.
Sunshine
December has the least sunshine of the year, with an average of 4.9h 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 reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: A daily maximum UV index of 3 in December translates into the following instructions:
Exercise prevention - Protecting skin and eyes from harm is required. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in December?
What are the most humid months?
What is the average humidity in December?
How much does it rain in December?
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 is the sunrise / sunset in December?
What is the month with the least sunshine?
How long on average sun shines in December?
What is the month with the lowest UV index?
What is the UV index reading in December in Chatham?
Average temperature in December
Chatham, LA
- Average high temperature in December: 56.5°F
The warmest month (with the highest average high temperature) is July (94.3°F).
The month with the lowest average high temperature is January (54.1°F).
- Average low temperature in December: 42.4°F
The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (38.7°F).
Average pressure in December
Chatham, LA
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Chatham, LA
- Average wind speed in December: 5.9mph
The windiest month (with the highest average wind speed) is April (6.8mph).
The calmest month (with the lowest average wind speed) is July (4.7mph).
Average humidity in December
Chatham, LA
- Average humidity in December: 82%
The months with the highest relative humidity are February and December (82%).
The months with the lowest relative humidity are August and October (71%).
Average rainfall in December
Chatham, LA
- Average rainfall in December: 3.11"
The wettest month (with the highest rainfall) is April (3.78").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in December
Chatham, LA
- Average rainfall days in December: 11.8 days
The month with the highest number of rainy days is July (15.7 days).
The month with the least rainy days is November (8.8 days).
Average snowfall in December
Chatham, LA
- Average snowfall in December: 0.08"
The month with the highest snowfall is February (0.16").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Chatham, LA
- Average snowfall days in December: 0.1 days
The months with the highest number of snowfall days are January and February (0.6 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
Chatham, LA
- Average daylight in December: 10h and 1min
The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days in December
Chatham, LA
- Average sunshine days in December: 16.7 days
The month with the most sunshine days is October (20.1 days).
The month with the least sunshine days is July (12.9 days).
Average UV index in December
Chatham, LA
- Average UV index in December: 3
The months with the highest UV index are May, 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
Chatham, LA
- Average cloud cover in December: 49
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is October (Cloud cover 29).
Average visibility in December
Chatham, LA
- Average visibility in December: 5mi
The months with the highest visibility are June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March, April, May and December (5mi).
Chatham, Louisiana, USA
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