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

December's arrival sees a clear drop in the average high-temperature, decreasing from November's cold 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, during December, the rain falls for 3.4 days and regularly aggregates up to 0.98" (25mm) of precipitation. In Plymouth, during the entire year, the rain falls for 113.9 days and collects up to 20.24" (514mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Plymouth. December is the month with the most snowfall. Snow falls for 12.6 days and accumulates 4.45" (113mm) of snow.

Daylight

December has the shortest days of the year, 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, in Plymouth, sunrise is at 7:51 am and sunset at 4:42 pm CST.

Sunshine

The average sunshine in December in Plymouth is 3.3h.

UV index

The months with the lowest UV index in Plymouth are January, February, November and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for the average person.
Note: In December, a daily maximum UV index of 1 leads to the following instructions:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
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Frequently asked questions

How cold is December in Plymouth?

In Plymouth, 25.3°F (-3.7°C) is the average high-temperature and 15.3°F (-9.3°C) is the average low-temperature during December. In July, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is estimated at 86°F (30°C).

What is the average humidity in December in Plymouth?

In December, the average relative humidity in Plymouth is 87%.

How much does it rain in Plymouth in December?

In Plymouth, during December, the rain falls for 3.4 days and regularly aggregates up to 0.98" (25mm) of precipitation.

When does it snow the most in Plymouth?

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

How much does it snow in Plymouth in December?

In Plymouth, Minnesota, in December, during 12.6 snowfall days, 4.45" (113mm) of snow is typically accumulated.

What is the month with the shortest days in Plymouth?

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

What is the average length of the day in December in Plymouth?

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

When is the sunrise / sunset in December in Plymouth?

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, in Plymouth, Minnesota, 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 in Plymouth, Minnesota, is 3.3h.

What is the month with the lowest UV index in Plymouth?

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

What is the UV index reading in December in Plymouth?

In Plymouth, Minnesota, the average daily maximum UV index in December is 1. A UV Index of 2, and less, symbolizes a minimal hazard to health from unsafe 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).

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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).

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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).

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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%).

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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").

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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).

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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").

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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).

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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).

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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).

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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).

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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).

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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).

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Plymouth, Minnesota, USA

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