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
Transition from November to December is accompanied by a temperature drop, with average high-temperatures decreasing from a chilly 45.3°F (7.4°C) to a wintry 34.2°F (1.2°C). In Napoleon, the nocturnal temperatures throughout December show a marginal dip from the daytime averages, settling at a freezing cold 25.2°F (-3.8°C).Humidity
In Napoleon, the average relative humidity in December is 84%.Rainfall
The month with the least rainfall in Napoleon is December, when the rain falls for 6.5 days and typically collects 0.87" (22mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In December, in Napoleon, it is snowing for 10.5 days. Throughout December, 1.54" (39mm) of snow is accumulated. In Napoleon, Michigan, during the entire year, snow falls for 51.4 days and aggregates up to 13.11" (333mm) of snow.Daylight
December has the shortest days of the year in Napoleon, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:46 am and sunset at 5:05 pm. On the last day of December, sunrise is at 8:05 am and sunset at 5:15 pm EST.
Sunshine
In Napoleon, the average sunshine in December is 3.2h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 1 during December translates into the following guidance:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Always opt for UVA and UVB-resistant sunglasses on radiant days. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Frequently asked questions
How cold is December in Napoleon?
What is the average humidity in December in Napoleon?
What is the driest month in Napoleon?
How many days does it rain in December in Napoleon?
How much does it snow in Napoleon in December?
What is the month with the shortest days in Napoleon?
What is the average length of the day in December in Napoleon?
What time are sunrise and sunset in December in Napoleon?
How long on average sun shines in December in Napoleon?
When is the lowest UV index in Napoleon?
How high is the UV index in December in Napoleon?
Average temperature in December
Napoleon, MI
- Average high temperature in December: 34.2°F
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in December: 25.2°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in December
Napoleon, MI
- Average pressure in December: 30.08"Hg
The months with the highest atmospheric pressure are March and November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Napoleon, MI
- Average wind speed in December: 9.9mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.4mph).
Average humidity in December
Napoleon, MI
- Average humidity in December: 84%
The months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is April (77%).
Average rainfall in December
Napoleon, MI
- Average rainfall in December: 0.87"
The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is December (0.87").
Average rainfall days in December
Napoleon, MI
- Average rainfall days in December: 6.5 days
The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in December
Napoleon, MI
- Average snowfall in December: 1.54"
The month with the highest snowfall is February (3.66").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Napoleon, MI
- Average snowfall days in December: 10.5 days
The month with the highest number of snowfall days is January (13 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, MI
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 3h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in December
Napoleon, MI
- Average sunshine days in December: 15.7 days
The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is May (9.9 days).
Average UV index in December
Napoleon, MI
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Napoleon, MI
- Average cloud cover in December: 66
The month with the most cloud cover is January (Cloud cover 71).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in December
Napoleon, MI
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, July, October, November and December (6mi).
The months with the lowest visibility are January, February, August and September (5mi).
Napoleon, Michigan, USA
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