December weather forecastPlymouth, MI
December
Weather in December
The first month of the winter, December, is also a wintry month in Plymouth, Michigan, with an average temperature varying between 34.7°F (1.5°C) and 26.1°F (-3.3°C).Temperature
As November transitions to December, the average high-temperature falls from a chilly 45.5°F (7.5°C) to a wintry 34.7°F (1.5°C). During December, nights cool slightly to an average low of 26.1°F (-3.3°C).Humidity
In Plymouth, the average relative humidity in December is 83%.Rainfall
The month with the least rainfall is December, when the rain falls for 6.3 days and typically collects 0.51" (13mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In December, it is snowing for 10.2 days. Throughout December, 0.79" (20mm) of snow is accumulated. Throughout the year, there are 46.3 snowfall days, and 6.14" (156mm) of snow is accumulated.Daylight
The month with the shortest days in Plymouth is December, with an average of 9h and 6min of daylight.On the first day of December, sunrise is at 7:44 am and sunset at 5:02 pm. On the last day of the month, sunrise is at 8:02 am and sunset at 5:11 pm EST.
Sunshine
In Plymouth, the average sunshine in December is 3.5h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index in Plymouth. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for the ordinary person.Note: In December, an average UV index of 1 transforms into the following instructions:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. To guard against the harmful effects of the Sun, minimize exposure during midday. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Plymouth, MI
- Average high temperature in December: 34.7°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (28.4°F).
- Average low temperature in December: 26.1°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (17.8°F).
Average pressure in December
Plymouth, 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
Plymouth, MI
- Average wind speed in December: 9.6mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).
Average humidity in December
Plymouth, MI
- Average humidity in December: 83%
The months with the highest relative humidity are January and February (85%).
The month with the lowest relative humidity is April (75%).
Average rainfall in December
Plymouth, MI
- Average rainfall in December: 0.51"
The wettest month (with the highest rainfall) is May (1.69").
The driest month (with the least rainfall) is December (0.51").
Average rainfall days in December
Plymouth, MI
- Average rainfall days in December: 6.3 days
The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is February (4.6 days).
Average snowfall in December
Plymouth, MI
- Average snowfall in December: 0.79"
The month with the highest snowfall is February (1.97").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Plymouth, MI
- Average snowfall days in December: 10.2 days
The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Plymouth, MI
- Average daylight in December: 9h and 6min
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 6min).
- Average sunshine in December: 3h and 30min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in December
Plymouth, MI
- Average sunshine days in December: 16.9 days
The month with the most sunshine days is October (18.6 days).
The month with the least sunshine days is April (13 days).
Average UV index in December
Plymouth, MI
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Plymouth, MI
- Average cloud cover in December: 64
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in December
Plymouth, MI
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
