December weather forecast
Hazelwood, MO

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Weather in December

December finally ushers in winter with temperatures falling to a low of 30°F (-1.1°C). Snowfall increases significantly to 1.81" (46mm) and daylight hours are the shortest in the year. Gloved hands, warm clothes, and hot drinks appear to be the city’s winter staples, while it dresses in holiday decorations to celebrate the festive season.

Temperature

A decrease in the average high-temperature is observed in Hazelwood during December, shifting from a cool 53.2°F (11.8°C) in November to a wintry 42.1°F (5.6°C). December witnesses an average nighttime temperature of 30°F (-1.1°C).

Humidity

In Hazelwood, Missouri, the average relative humidity in December is 76%.

Rainfall

In Hazelwood, Missouri, during December, the rain falls for 7.3 days and regularly aggregates up to 1.73" (44mm) of precipitation. Throughout the year, in Hazelwood, Missouri, there are 141.9 rainfall days, and 27.68" (703mm) of precipitation is accumulated.

Snowfall

January through March, November and December are months with snowfall. In Hazelwood, in December, during 4.4 snowfall days, 1.81" (46mm) of snow is typically accumulated. Throughout the year, in Hazelwood, there are 21.6 snowfall days, and 6.73" (171mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 30min of daylight.
On the first day of the month, sunrise is at 7:01 am and sunset at 4:40 pm. On the last day of December, sunrise is at 7:19 am and sunset at 4:50 pm CST.

Sunshine

The average sunshine in December in Hazelwood is 4.9h.

UV index

The months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the average person.
Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
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Frequently asked questions

How cold does it get in Hazelwood in December?

The high-temperature, in December, in Hazelwood, records 42.1°F (5.6°C), while the low-temperature is 30°F (-1.1°C). In August, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is calculated to be 95°F (35°C).

What is the average humidity in December in Hazelwood?

In December, the average relative humidity is 76%.

How many days does it rain in December in Hazelwood?

In December, in Hazelwood, the rain falls for 7.3 days. Throughout December, 1.73" (44mm) of precipitation is accumulated.

How much does it snow in Hazelwood in December?

In Hazelwood, Missouri, during December, snow falls for 4.4 days and regularly aggregates up to 1.81" (46mm) of snow.

What is the month with the shortest days in Hazelwood?

December has the shortest days of the year in Hazelwood, Missouri, with an average of 9h and 30min of daylight.

How many hours of daylight does Hazelwood have in December?

In December, the average day length in Hazelwood is 9h and 31min.

What time are sunrise and sunset in December in Hazelwood?

On the first day of December in Hazelwood, Missouri, sunrise is at 7:01 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:50 pm CST.

How long on average sun shines in December in Hazelwood?

In December, the average sunshine duration is 4.9h.

What are the months with the lowest UV index in Hazelwood?

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

How high is the UV index in December in Hazelwood?

The average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low health threat 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
Hazelwood, MO

Average temperature in December - Hazelwood, MO
  • Average high temperature in December: 42.1°F

The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is January (37.2°F).

  • Average low temperature in December: 30°F

The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).

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Average pressure in December
Hazelwood, MO

Average pressure in December - Hazelwood, MO
  • 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
Hazelwood, MO

Average wind speed in December - Hazelwood, MO
  • Average wind speed in December: 8.6mph

The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.6mph).

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Average humidity in December
Hazelwood, MO

Average humidity in December - Hazelwood, MO
  • Average humidity in December: 76%

The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is October (70%).

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Average rainfall in December
Hazelwood, MO

Average rainfall in December - Hazelwood, MO
  • Average rainfall in December: 1.73"

The wettest month (with the highest rainfall) is May (3.31").
The driest month (with the least rainfall) is February (1.42").

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Average rainfall days in December
Hazelwood, MO

Average rainfall days in December - Hazelwood, MO
  • Average rainfall days in December: 7.3 days

The month with the highest number of rainy days is July (16.3 days).
The months with the least rainy days are February and December (7.3 days).

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Average snowfall in December
Hazelwood, MO

Average snowfall in December - Hazelwood, MO
  • Average snowfall in December: 1.81"

The month with the highest snowfall is February (2.05").
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
Hazelwood, MO

Average snowfall days in December - Hazelwood, MO
  • Average snowfall days in December: 4.4 days

The month with the highest number of snowfall days is January (6.8 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
Hazelwood, MO

Average daylight in December / Average sunshine in December - Hazelwood, MO
  • 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 month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).

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Average sunshine days in December
Hazelwood, MO

Average sunshine days in December - Hazelwood, MO
  • Average sunshine days in December: 18.8 days

The month with the most sunshine days is October (19.2 days).
The month with the least sunshine days is July (11.4 days).

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Average UV index in December
Hazelwood, MO

Average UV index in December - Hazelwood, MO
  • 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
Hazelwood, MO

Average cloud cover in December - Hazelwood, MO
  • Average cloud cover in December: 48

The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).

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Average visibility in December
Hazelwood, MO

Average visibility in December - Hazelwood, MO
  • 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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Hazelwood, Missouri, USA

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