December weather forecast
Millstadt, IL

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Weather in December

December, the first month of the winter in Millstadt, is also a frosty month, with an average temperature varying between 30.7°F (-0.7°C) and 43.2°F (6.2°C).

Temperature

With the onset of December, Millstadt experiences a modest temperature adjustment, with the average high-temperature receding from a cool 53.6°F (12°C) in November to a chilly 43.2°F (6.2°C). Throughout December, the average low-temperature in Millstadt records at a subzero cold 30.7°F (-0.7°C).

Humidity

The average relative humidity in December in Millstadt is 76%.

Rainfall

In Millstadt, in December, it is raining for 7.4 days, with typically 1.54" (39mm) of accumulated precipitation. Throughout the year, in Millstadt, there are 133.3 rainfall days, and 23.03" (585mm) of precipitation is accumulated.

Snowfall

January through March, November and December are months with snowfall. In Millstadt, in December, during 3.5 snowfall days, 1.18" (30mm) of snow is typically accumulated. In Millstadt, during the entire year, snow falls for 18.5 days and aggregates up to 5.04" (128mm) of snow.

Daylight

December has the shortest days of the year in Millstadt, with an average of 9h and 30min of daylight.
On the first day of December in Millstadt, sunrise is at 6:59 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 4:49 pm CST.

Sunshine

In December, the average sunshine is 4.8h.

UV index

The months with the lowest UV index in Millstadt are January, February and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the average person.
Note: In December, the maximum UV index of 2 transforms into these recommendations:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
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Frequently asked questions

How cold is it in Millstadt in December?

During December, Millstadt experiences an average high-temperature of 43.2°F (6.2°C) and a low-temperature of 30.7°F (-0.7°C). In August, the average heat index (a.k.a. 'real feel', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, is computed to be 95°F (35°C).

What is the average humidity in December in Millstadt?

In Millstadt, Illinois, the average relative humidity in December is 76%.

How many days does it rain in December in Millstadt?

In Millstadt, during December, the rain falls for 7.4 days and regularly aggregates up to 1.54" (39mm) of precipitation.

How many days does it snow in December in Millstadt?

In Millstadt, Illinois, in December, snow falls for 3.5 days, with typically accumulated 1.18" (30mm) of snow.

What is the month with the shortest days in Millstadt?

The month with the shortest days in Millstadt, Illinois, is December, with an average of 9h and 30min of daylight.

How many hours of daylight does Millstadt have in December?

In Millstadt, Illinois, the average day length in December is 9h and 32min.

When is the sunrise / sunset in December in Millstadt?

In December, on the first day of the month, sunrise is at 6:59 am and sunset at 4:39 pm. On the last day of the month, in Millstadt, sunrise is at 7:17 am and sunset at 4:49 pm CST.

How long on average sun shines in December in Millstadt?

In Millstadt, Illinois, the average sunshine duration in December is 4.8h.

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

The months with the lowest UV index in Millstadt are January, February and December, with an average maximum UV index of 2.

How high is the UV index in December in Millstadt?

The average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation.
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
Millstadt, IL

Average temperature in December - Millstadt, IL
  • Average high temperature in December: 43.2°F

The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (37.9°F).

  • Average low temperature in December: 30.7°F

The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (25°F).

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Average pressure in December
Millstadt, IL

Average pressure in December - Millstadt, IL
  • Average pressure in December: 30.13"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in December
Millstadt, IL

Average wind speed in December - Millstadt, IL
  • Average wind speed in December: 8.6mph

The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is July (5.5mph).

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Average humidity in December
Millstadt, IL

Average humidity in December - Millstadt, IL
  • Average humidity in December: 76%

The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in December
Millstadt, IL

Average rainfall in December - Millstadt, IL
  • Average rainfall in December: 1.54"

The wettest month (with the highest rainfall) is May (2.95").
The driest month (with the least rainfall) is February (1.1").

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Average rainfall days in December
Millstadt, IL

Average rainfall days in December - Millstadt, IL
  • Average rainfall days in December: 7.4 days

The month with the highest number of rainy days is July (16.3 days).
The month with the least rainy days is January (6 days).

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Average snowfall in December
Millstadt, IL

Average snowfall in December - Millstadt, IL
  • Average snowfall in December: 1.18"

The month with the highest snowfall is February (1.5").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in December
Millstadt, IL

Average snowfall days in December - Millstadt, IL
  • Average snowfall days in December: 3.5 days

The month with the highest number of snowfall days is January (5.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Millstadt, IL

Average daylight in December / Average sunshine in December - Millstadt, IL
  • Average daylight in December: 9h and 3min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in December: 4h and 5min

The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).

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Average sunshine days in December
Millstadt, IL

Average sunshine days in December - Millstadt, IL
  • Average sunshine days in December: 20.1 days

The month with the most sunshine days is January (21.1 days).
The month with the least sunshine days is July (12.1 days).

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Average UV index in December
Millstadt, IL

Average UV index in December - Millstadt, IL
  • Average UV index in December: 2

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).

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Average cloud cover in December
Millstadt, IL

Average cloud cover in December - Millstadt, IL
  • Average cloud cover in December: 49

The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are June, July and August (Cloud cover 29).

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Average visibility in December
Millstadt, IL

Average visibility in December - Millstadt, IL
  • Average visibility in December: 6mi

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

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Millstadt, Illinois, USA

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