December weather forecastNapoleon, MO
December
Weather in December
December, the first month of the winter in Napoleon, is also an icy month, with temperature in the range of an average high of 40.3°F (4.6°C) and an average low of 27.1°F (-2.7°C).Temperature
The move into December indicates a reduction in the average high-temperature, down from November's cool 52.3°F (11.3°C) to a wintry 40.3°F (4.6°C). During December, Napoleon experiences a consistent low-temperature average of 27.1°F (-2.7°C).Humidity
In December, the average relative humidity is 75%.Rainfall
In December, the rain falls for 5.6 days. Throughout December, 1.54" (39mm) of precipitation is accumulated. In Napoleon, during the entire year, the rain falls for 136.3 days and collects up to 27.28" (693mm) of precipitation.Snowfall
Months with snowfall are January through March, May, October through December. In December, in Napoleon, it is snowing for 3.5 days. Throughout December, 1.14" (29mm) of snow is accumulated. Throughout the year, there are 16.7 snowfall days, and 8.86" (225mm) of snow is accumulated.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:17 am and sunset at 4:54 pm. On the last day of December, sunrise is at 7:35 am and sunset at 5:03 pm CST.
Sunshine
In Napoleon, the average sunshine in December is 5.2h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Napoleon, MO
- Average high temperature in December: 40.3°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (36.5°F).
- Average low temperature in December: 27.1°F
The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (22.3°F).
Average pressure in December
Napoleon, MO
- 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 (29.89"Hg).
Average wind speed in December
Napoleon, MO
- Average wind speed in December: 9.1mph
The windiest month (with the highest average wind speed) is March (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in December
Napoleon, MO
- Average humidity in December: 75%
The months with the highest relative humidity are May and June (79%).
The months with the lowest relative humidity are October and November (71%).
Average rainfall in December
Napoleon, MO
- Average rainfall in December: 1.54"
The wettest month (with the highest rainfall) is May (3.62").
The driest month (with the least rainfall) is January (0.94").
Average rainfall days in December
Napoleon, MO
- Average rainfall days in December: 5.6 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is January (5.4 days).
Average snowfall in December
Napoleon, MO
- Average snowfall in December: 1.14"
The month with the highest snowfall is February (3.35").
The months with the least snowfall are April, June, July, August and September (0").
Average snowfall days in December
Napoleon, MO
- Average snowfall days in December: 3.5 days
The month with the highest number of snowfall days is February (4.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Napoleon, MO
- Average daylight in December: 9h and 30min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 5h and 12min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).
Average sunshine days in December
Napoleon, MO
- Average sunshine days in December: 22 days
The month with the most sunshine days is December (22 days).
The months with the least sunshine days are May and June (11.6 days).
Average UV index in December
Napoleon, MO
- 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, MO
- Average cloud cover in December: 42
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in December
Napoleon, MO
- 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).
