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
The onset of December is marked by a decrease in temperature, transitioning from a frosty 44.6°F (7°C) in November to a wintry 33.3°F (0.7°C). The nights of December anticipate a slight dip from daytime high temperatures, settling to an average low-temperature of 24.8°F (-4°C).Humidity
In December, the average relative humidity is 85%.Rainfall
In DeWitt, in December, during 8.3 rainfall days, 1.46" (37mm) of precipitation is typically accumulated. In DeWitt, during the entire year, the rain falls for 144.6 days and collects up to 24.09" (612mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In December, it is snowing for 12.6 days. Throughout December, 2.91" (74mm) of snow is accumulated. In DeWitt, during the entire year, snow falls for 59.2 days and aggregates up to 16.46" (418mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:49 am and sunset at 5:05 pm. On the last day of December, in DeWitt, sunrise is at 8:08 am and sunset at 5:14 pm EST.
Sunshine
The average sunshine in December is 3.4h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, the average maximum UV index of 1 translates into the following recommendations:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does DeWitt have in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
When is the lowest UV index?
What is the UV index reading in December?
Average temperature in December
DeWitt, MI
- Average high temperature in December: 33.3°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (27.1°F).
- Average low temperature in December: 24.8°F
The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in December
DeWitt, MI
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
DeWitt, MI
- Average wind speed in December: 9.7mph
The windiest months (with the highest average wind speed) are January and February (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).
Average humidity in December
DeWitt, MI
- Average humidity in December: 85%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is April (77%).
Average rainfall in December
DeWitt, MI
- Average rainfall in December: 1.46"
The wettest month (with the highest rainfall) is May (3.15").
The driest month (with the least rainfall) is February (1.38").
Average rainfall days in December
DeWitt, MI
- Average rainfall days in December: 8.3 days
The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is February (5.7 days).
Average snowfall in December
DeWitt, MI
- Average snowfall in December: 2.91"
The month with the highest snowfall is January (4.33").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
DeWitt, MI
- Average snowfall days in December: 12.6 days
The month with the highest number of snowfall days is January (16.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
DeWitt, MI
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 3h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).
Average sunshine days in December
DeWitt, MI
- Average sunshine days in December: 12.5 days
The month with the most sunshine days is September (15.5 days).
The month with the least sunshine days is January (10.3 days).
Average UV index in December
DeWitt, 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
DeWitt, 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 30).
Average visibility in December
DeWitt, MI
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, October and November (6mi).
The months with the lowest visibility are January, February, September and December (5mi).
DeWitt, Michigan, USA
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