December weather forecast
Williamston, MI

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Weather in December

The first month of the winter, December, is also an icy month in Williamston, Michigan, with an average temperature varying between 25°F (-3.9°C) and 33.3°F (0.7°C).

Temperature

Observing a mild shift, the average high-temperature during December reduces from November's chilly 44.8°F (7.1°C) to a wintry 33.3°F (0.7°C). During the nights of December, Williamston records an average temperature of 25°F (-3.9°C), a minor drop from daytime peaks.

Humidity

The average relative humidity in December in Williamston is 84%.

Rainfall

December is the month with the least rainfall in Williamston. Rain falls for 8.6 days and accumulates 1.42" (36mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Williamston, Michigan. In Williamston, in December, during 13 snowfall days, 3.11" (79mm) of snow is typically accumulated. Throughout the year, in Williamston, there are 66.3 snowfall days, and 19.17" (487mm) of snow is accumulated.

Daylight

The month with the shortest days in Williamston is December, with an average of 9h and 6min of daylight.
On the first day of the month, sunrise is at 7:48 am and sunset at 5:04 pm. On the last day of December, in Williamston, Michigan, sunrise is at 8:07 am and sunset at 5:13 pm EST.

Sunshine

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

UV index

The months with the lowest UV index in Williamston are January and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for the average person.
Note: The maximum UV index of 1 during December leads to these instructions:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Resources | Updated: Feb 12, 2024 | Published by: Weather U.S.

Frequently asked questions

How cold is December in Williamston?

Williamston in December has an average high-temperature of 33.3°F (0.7°C) and an average low-temperature of 25°F (-3.9°C).

What is the average humidity in December in Williamston?

In Williamston, the average relative humidity in December is 84%.

What is the driest month in Williamston?

The month with the least rainfall in Williamston is December, when the rain falls for 8.6 days and typically collects 1.42" (36mm) of precipitation.

How much does it rain in Williamston in December?

In Williamston, in December, during 8.6 rainfall days, 1.42" (36mm) of precipitation is typically accumulated.

How many days does it snow in December in Williamston?

In Williamston, during December, snow falls for 13 days and regularly aggregates up to 3.11" (79mm) of snow.

What is the month with the shortest days in Williamston?

With an average of 9h and 6min of daylight, December has the shortest days of the year in Williamston.

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

In December, the average day length in Williamston is 9h and 6min.

When is the sunrise / sunset in December in Williamston?

In December, on the first day of the month, sunrise is at 7:48 am and sunset at 5:04 pm. On the last day of the month, sunrise is at 8:07 am and sunset at 5:13 pm EST.

How many hours of sunshine does Williamston have in December?

In Williamston, Michigan, the average sunshine duration in December is 3.3h.

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

The months with the lowest UV index in Williamston are January and December, with an average maximum UV index of 1.

What is the UV index reading in December in Williamston?

In Williamston, Michigan, the average daily maximum UV index in December is 1. A UV Index estimate of 2, and below, represents a low health risk 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
Williamston, MI

Average temperature in December - Williamston, MI
  • Average high temperature in December: 33.3°F

The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (27.7°F).

  • Average low temperature in December: 25°F

The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).

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Average pressure in December
Williamston, MI

Average pressure in December - Williamston, MI
  • Average pressure in December: 30.07"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).

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Average wind speed in December
Williamston, MI

Average wind speed in December - Williamston, 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 month (with the lowest average wind speed) is July (6.5mph).

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Average humidity in December
Williamston, MI

Average humidity in December - Williamston, 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%).

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Average rainfall in December
Williamston, MI

Average rainfall in December - Williamston, MI
  • Average rainfall in December: 1.42"

The wettest month (with the highest rainfall) is May (2.99").
The driest month (with the least rainfall) is December (1.42").

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Average rainfall days in December
Williamston, MI

Average rainfall days in December - Williamston, MI
  • Average rainfall days in December: 8.6 days

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is February (6.2 days).

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Average snowfall in December
Williamston, MI

Average snowfall in December - Williamston, MI
  • Average snowfall in December: 3.11"

The month with the highest snowfall is February (5.51").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Williamston, MI

Average snowfall days in December - Williamston, MI
  • Average snowfall days in December: 13 days

The month with the highest number of snowfall days is January (17.5 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
Williamston, MI

Average daylight in December / Average sunshine in December - Williamston, 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 12min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).

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Average sunshine days in December
Williamston, MI

Average sunshine days in December - Williamston, MI
  • Average sunshine days in December: 12.2 days

The month with the most sunshine days is September (15.6 days).
The month with the least sunshine days is February (8.6 days).

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Average UV index in December
Williamston, MI

Average UV index in December - Williamston, 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).

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Average cloud cover in December
Williamston, MI

Average cloud cover in December - Williamston, 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 31).

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Average visibility in December
Williamston, MI

Average visibility in December - Williamston, MI
  • Average visibility in December: 5mi

The months with the highest visibility are March, April, May, June, July, October and November (6mi).
The months with the lowest visibility are January, February, August, September and December (5mi).

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Williamston, Michigan, USA

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