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 arrival comes with a mild decrease in the average high-temperature, moving subtly from 64.6°F (18.1°C) in November to a still refreshing 56.5°F (13.6°C). Jamestown, during December nights, observes an average temperature of 42.1°F (5.6°C).Humidity
The average relative humidity in December in Jamestown is 81%.Rainfall
In December, the rain falls for 12.5 days. Throughout December, 3.46" (88mm) of precipitation is accumulated. In Jamestown, during the entire year, the rain falls for 158.9 days and collects up to 39.17" (995mm) of precipitation.Snowfall
January through March and December are months with snowfall. December is the first month it typically snows. Throughout December, in the average 0.6 snowfall days, it receives 0.12" (3mm) of snow. In Jamestown, during the entire year, snow falls for 3.2 days and aggregates up to 0.94" (24mm) of snow.Daylight
The month with the shortest days is December, with an average of 10h and 6min of daylight.On the first day of the month, sunrise is at 6:56 am and sunset at 5:07 pm. On the last day of December, sunrise is at 7:14 am and sunset at 5:18 pm CST.
Sunshine
December has the least sunshine of the year, with an average of 4.9h of sunshine.UV index
January and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: In December, the average maximum UV index of 3 translates into the following recommendations:
Make use of precautions - Suggestions to resist sunburn are communicated. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December in Jamestown?
What is the average humidity in December?
How many days 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?
What time are sunrise and sunset in December in Jamestown?
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?
How high is the UV index in December?
Average temperature in December
Jamestown, LA
- Average high temperature in December: 56.5°F
The warmest months (with the highest average high temperature) are July and August (94.6°F).
The month with the lowest average high temperature is January (54.1°F).
- Average low temperature in December: 42.1°F
The month with the highest average low temperature is July (73.2°F).
The coldest month (with the lowest average low temperature) is January (38.5°F).
Average pressure in December
Jamestown, LA
- 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 (29.93"Hg).
Average wind speed in December
Jamestown, LA
- Average wind speed in December: 6.1mph
The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest months (with the lowest average wind speed) are July and August (4.9mph).
Average humidity in December
Jamestown, LA
- Average humidity in December: 81%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is August (69%).
Average rainfall in December
Jamestown, LA
- Average rainfall in December: 3.46"
The wettest month (with the highest rainfall) is May (4.17").
The driest months (with the least rainfall) are July and September (2.52").
Average rainfall days in December
Jamestown, LA
- Average rainfall days in December: 12.5 days
The month with the highest number of rainy days is March (15.6 days).
The month with the least rainy days is October (9.5 days).
Average snowfall in December
Jamestown, LA
- Average snowfall in December: 0.12"
The month with the highest snowfall is February (0.47").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Jamestown, LA
- Average snowfall days in December: 0.6 days
The month with the highest number of snowfall days is February (1.1 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
Jamestown, 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 August (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days in December
Jamestown, LA
- Average sunshine days in December: 15.4 days
The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is February (12.9 days).
Average UV index in December
Jamestown, LA
- 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
Jamestown, LA
- Average cloud cover in December: 49
The month with the most cloud cover is February (Cloud cover 51).
The months with the least cloud cover are August and September (Cloud cover 29).
Average visibility in December
Jamestown, 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).
Jamestown, Louisiana, USA
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