December weather forecast
Marion, IN

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Weather in December

Closing the year with frosty days and icy nights, December in Marion, Indiana, presents winter in its full swing. Evidence of winter conditions is clear with an average of 0.87" (22mm) of snowfall. With a relatively high percentage of cloudy days, December is characterized by winter grays and whites. Despite the drop in temperatures, the holiday spirit of the city shimmers through the frosty days and colder nights. To sum it up, December is all about embracing the cold and participating in winter festivities under a snowy panorama.

Temperature

The commencement of December involves a temperature shift, with the average high-temperature dropping from a chilly 48.2°F (9°C) in November to a wintry 37.2°F (2.9°C). The nighttime temperature, during December, averages of 27.3°F (-2.6°C).

Humidity

January and December, with an average relative humidity of 83%, are the most humid months in Marion.

Rainfall

In Marion, in December, during 6.2 rainfall days, 0.83" (21mm) of precipitation is typically accumulated. Throughout the year, in Marion, there are 123.4 rainfall days, and 12.64" (321mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall in Marion, Indiana. In Marion, in December, snow falls for 6.5 days, with typically accumulated 0.87" (22mm) of snow. Throughout the year, in Marion, Indiana, there are 32.4 snowfall days, and 4.41" (112mm) of snow is accumulated.

Daylight

December has the shortest days of the year in Marion, with an average of 9h and 18min of daylight.
On the first day of the month, sunrise is at 7:47 am and sunset at 5:16 pm. On the last day of December, in Marion, sunrise is at 8:06 am and sunset at 5:25 pm EST.

Sunshine

In Marion, the average sunshine in December is 3.9h.

UV index

December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum UV index of 1 during December leads to these instructions:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
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Frequently asked questions

How cold is it in Marion in December?

In December, in Marion, the average high-temperature is 37.2°F (2.9°C), and the average low-temperature is 27.3°F (-2.6°C). In July, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which represents the influence of relative humidity on air temperature, is computed to be 87.8°F (31°C).

What is the most humid month in Marion?

January and December, with an average relative humidity of 83%, are most humid months in Marion, Indiana.

What is the average humidity in December in Marion?

In December, the average relative humidity is 83%.

How many days does it rain in December in Marion?

In Marion, in December, it is raining for 6.2 days, with typically 0.83" (21mm) of accumulated precipitation.

How much does it snow in Marion in December?

In Marion, in December, snow falls for 6.5 days, with typically accumulated 0.87" (22mm) of snow.

What is the month with the shortest days in Marion?

The month with the shortest days is December, with an average of 9h and 18min of daylight.

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

In Marion, the average day length in December is 9h and 20min.

When are sunrise and sunset in December in Marion?

In December, on the first day of the month, sunrise is at 7:47 am and sunset at 5:16 pm. On the last day of the month, sunrise is at 8:06 am and sunset at 5:25 pm EST.

How many hours of sunshine does Marion have in December?

The average sunshine duration in December is 3.9h.

When is the lowest UV index in Marion?

December is the month with the lowest UV index, with an average maximum UV index of 1.

What is the UV index intensity in December in Marion?

In Marion, Indiana, the average daily maximum UV index in December is 1. A UV Index reading of 2, and below, represents a low health threat 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
Marion, IN

Average temperature in December - Marion, IN
  • Average high temperature in December: 37.2°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (31.5°F).

  • Average low temperature in December: 27.3°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

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Average pressure in December
Marion, IN

Average pressure in December - Marion, IN
  • Average pressure in December: 30.11"Hg

The months with the highest atmospheric pressure are January and November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in December
Marion, IN

Average wind speed in December - Marion, IN
  • Average wind speed in December: 9.6mph

The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).

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Average humidity in December
Marion, IN

Average humidity in December - Marion, IN
  • Average humidity in December: 83%

The months with the highest relative humidity are January and December (83%).
The month with the lowest relative humidity is October (73%).

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Average rainfall in December
Marion, IN

Average rainfall in December - Marion, IN
  • Average rainfall in December: 0.83"

The wettest month (with the highest rainfall) is May (1.69").
The driest month (with the least rainfall) is February (0.63").

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Average rainfall days in December
Marion, IN

Average rainfall days in December - Marion, IN
  • Average rainfall days in December: 6.2 days

The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (4.8 days).

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Average snowfall in December
Marion, IN

Average snowfall in December - Marion, IN
  • Average snowfall in December: 0.87"

The month with the highest snowfall is February (1.14").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in December
Marion, IN

Average snowfall days in December - Marion, IN
  • Average snowfall days in December: 6.5 days

The month with the highest number of snowfall days is January (9.8 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
Marion, IN

Average daylight in December / Average sunshine in December - Marion, IN
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in December: 3h and 5min

The months with the most sunshine are June and July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).

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Average sunshine days in December
Marion, IN

Average sunshine days in December - Marion, IN
  • Average sunshine days in December: 18.9 days

The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is May (11.6 days).

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Average UV index in December
Marion, IN

Average UV index in December - Marion, IN
  • 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).

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Average cloud cover in December
Marion, IN

Average cloud cover in December - Marion, IN
  • Average cloud cover in December: 60

The month with the most cloud cover is January (Cloud cover 64).
The months with the least cloud cover are June, July and August (Cloud cover 34).

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Average visibility in December
Marion, IN

Average visibility in December - Marion, IN
  • Average visibility in December: 6mi

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

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Marion, Indiana, USA

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