December weather forecastNapoleon, KY
December
Weather in December
December, the first month of the winter in Napoleon, is still a cold month, with an average temperature ranging between max 42.4°F (5.8°C) and min 31.1°F (-0.5°C).Temperature
December ushers in a slight temperature change, with average high-temperatures reducing from November's cool 51.8°F (11°C) to a cold 42.4°F (5.8°C). Napoleon experiences an average low-temperature of 31.1°F (-0.5°C) in the month of December.Humidity
February and December, with an average relative humidity of 81%, are the most humid months in Napoleon.Rainfall
In December, the rain falls for 8.9 days. Throughout December, 0.79" (20mm) of precipitation is accumulated. Throughout the year, there are 121.2 rainfall days, and 10.87" (276mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall in Napoleon, Kentucky. The month with the most snowfall in Napoleon is December, when snow falls for 4.8 days and typically aggregates up to 0.47" (12mm) of snow.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year in Napoleon, Kentucky.On the first day of the month, sunrise is at 7:38 am and sunset at 5:17 pm. On the last day of December, in Napoleon, sunrise is at 7:57 am and sunset at 5:27 pm EST.
Sunshine
The average sunshine in December in Napoleon is 4.3h.UV index
The months with the lowest UV index in Napoleon are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In December, the maximum UV index of 2 suggests this advice:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Boost your sun resistance with garments that are densely woven yet spacious. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Napoleon, KY
- Average high temperature in December: 42.4°F
The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is January (37.4°F).
- Average low temperature in December: 31.1°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in December
Napoleon, KY
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Napoleon, KY
- Average wind speed in December: 7.8mph
The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in December
Napoleon, KY
- Average humidity in December: 81%
The months with the highest relative humidity are February and December (81%).
The months with the lowest relative humidity are August, September and October (75%).
Average rainfall in December
Napoleon, KY
- Average rainfall in December: 0.79"
The wettest month (with the highest rainfall) is May (1.18").
The driest month (with the least rainfall) is September (0.55").
Average rainfall days in December
Napoleon, KY
- Average rainfall days in December: 8.9 days
The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is November (6.8 days).
Average snowfall in December
Napoleon, KY
- Average snowfall in December: 0.47"
The month with the highest snowfall is December (0.47").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Napoleon, KY
- Average snowfall days in December: 4.8 days
The month with the highest number of snowfall days is January (5.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Napoleon, KY
- Average daylight in December: 9h and 30min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 4h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in December
Napoleon, KY
- Average sunshine days in December: 18.6 days
The months with the most sunshine days are October and November (21 days).
The month with the least sunshine days is May (13.6 days).
Average UV index in December
Napoleon, KY
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Napoleon, KY
- Average cloud cover in December: 56
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in December
Napoleon, KY
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, August, September, October, November and December (6mi).
The months with the lowest visibility are May and July (5mi).
