December weather forecast
Plymouth, MN

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Weather in December

Plymouth, Minnesota enters its coldest period in December. As the year draws to an end, temperatures drop further, bringing chilly winds to an average of 8mph (12.9km/h). With 4.45" (113mm) of snowfall decorating the city in white, snow-related activities become prevalent. Despite being the coldest month, the holiday season fills the atmosphere with warmth and merriment. The weather, along with the festive spirit, paints Plymouth in a beautiful blend of cold, color, and celebration.

Temperature

Plymouth's December weather is characterized by a distinct downswing in high-temperatures, falling from November's icy 40.1°F (4.5°C) to a subzero cold 25.3°F (-3.7°C). Plymouth observes an average low-temperature of 15.3°F (-9.3°C) during December nights.

Humidity

The average relative humidity in December is 87%.

Rainfall

In Plymouth, in December, during 3.4 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. Throughout the year, there are 113.9 rainfall days, and 20.24" (514mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. The month with the most snowfall is December, when snow falls for 12.6 days and typically aggregates up to 4.45" (113mm) of snow.

Daylight

December has the shortest days of the year in Plymouth, with an average of 8h and 48min of daylight.
On the first day of the month, sunrise is at 7:32 am and sunset at 4:33 pm. On the last day of December, sunrise is at 7:51 am and sunset at 4:42 pm CST.

Sunshine

In Plymouth, the average sunshine in December is 3.3h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: In December, the maximum UV index of 1 translates into these guidelines:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.

Frequently asked questions

How cold is it in Plymouth in December?

The high-temperature during December is 25.3°F (-3.7°C) and the low-temperature is 15.3°F (-9.3°C). In July, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which represents the influence of relative humidity on air temperature, is estimated at 86°F (30°C).

What is the average humidity in December?

The average relative humidity in December is 87%.

How many days does it rain in December in Plymouth?

In December, the rain falls for 3.4 days. Throughout December, 0.98" (25mm) of precipitation is accumulated.

What is the snowiest month?

December is the month with the most snowfall. Snow falls for 12.6 days and accumulates 4.45" (113mm) of snow.

How much does it snow in December?

In Plymouth, during December, snow falls for 12.6 days and regularly aggregates up to 4.45" (113mm) of snow.

What is the month with the shortest days?

With an average of 8h and 48min of daylight, December has the shortest days of the year.

What is the average length of the day in December?

In December, the average day length is 8h and 50min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:32 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:51 am and sunset at 4:42 pm CST.

How long on average sun shines in December in Plymouth?

In December, the average sunshine duration is 3.3h.

What is the month with the lowest UV index?

January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index.

What is the UV index intensity in December?

The average daily maximum UV index in December is 1. A UV Index value of 2, and less, symbolizes a low health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Plymouth, MN

Average temperature in December - Plymouth, MN
  • Average high temperature in December: 25.3°F

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (20.1°F).

  • Average low temperature in December: 15.3°F

The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (7.5°F).

Average pressure in December
Plymouth, MN

Average pressure in December - Plymouth, MN
  • Average pressure in December: 30.11"Hg

The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

Average wind speed in December
Plymouth, MN

Average wind speed in December - Plymouth, MN
  • Average wind speed in December: 8mph

The windiest month (with the highest average wind speed) is April (9.2mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).

Average humidity in December
Plymouth, MN

Average humidity in December - Plymouth, MN
  • Average humidity in December: 87%

The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are April and May (70%).

Average rainfall in December
Plymouth, MN

Average rainfall in December - Plymouth, MN
  • Average rainfall in December: 0.98"

The wettest month (with the highest rainfall) is June (3.35").
The driest month (with the least rainfall) is January (0.55").

Average rainfall days in December
Plymouth, MN

Average rainfall days in December - Plymouth, MN
  • Average rainfall days in December: 3.4 days

The month with the highest number of rainy days is June (16.3 days).
The month with the least rainy days is January (1.9 days).

Average snowfall in December
Plymouth, MN

Average snowfall in December - Plymouth, MN
  • Average snowfall in December: 4.45"

The month with the highest snowfall is December (4.45").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Plymouth, MN

Average snowfall days in December - Plymouth, MN
  • Average snowfall days in December: 12.6 days

The month with the highest number of snowfall days is January (15.7 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, MN

Average daylight in December / Average sunshine in December - Plymouth, MN
  • Average daylight in December: 8h and 5min

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

  • Average sunshine in December: 3h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).

Average sunshine days in December
Plymouth, MN

Average sunshine days in December - Plymouth, MN
  • Average sunshine days in December: 16.9 days

The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is June (10.9 days).

Average UV index in December
Plymouth, MN

Average UV index in December - Plymouth, MN
  • Average UV index in December: 1

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).

Average cloud cover in December
Plymouth, MN

Average cloud cover in December - Plymouth, MN
  • Average cloud cover in December: 65

The month with the most cloud cover is January (Cloud cover 68).
The months with the least cloud cover are July and August (Cloud cover 32).

Average visibility in December
Plymouth, MN

Average visibility in December - Plymouth, MN
  • Average visibility in December: 5mi

The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).

Plymouth, Minnesota, USA

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