December weather forecast
Hanley Hills, MO

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Weather in December

The first month of the winter, December, is also a wintry month in Hanley Hills, Missouri, with temperature in the range of an average low of 30.6°F (-0.8°C) and an average high of 42.6°F (5.9°C).

Temperature

Arrival of December comes with a reduction in the average high-temperature, falling from a cool 53.4°F (11.9°C) in November to a cold 42.6°F (5.9°C). In the month of December, an average of 30.6°F (-0.8°C) marks the low-temperature in Hanley Hills.

Humidity

The average relative humidity in December is 76%.

Rainfall

In Hanley Hills, in December, during 7.5 rainfall days, 2.05" (52mm) of precipitation is typically accumulated. In Hanley Hills, during the entire year, the rain falls for 144.8 days and collects up to 30.59" (777mm) of precipitation.

Snowfall

Months with snowfall are January through March, November and December. In Hanley Hills, during December, snow falls for 3.1 days and regularly aggregates up to 1.85" (47mm) of snow. Throughout the year, in Hanley Hills, Missouri, there are 16.2 snowfall days, and 8.19" (208mm) 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 December, sunrise is at 7:00 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.

Sunshine

In Hanley Hills, Missouri, the average sunshine in December is 4.9h.

UV index

The months with the lowest UV index in Hanley Hills are January, February and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum daily UV index of 2 during December translates into the following directions:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. To cut down UV radiation exposure by about half, sport a wide-brim hat. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
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Frequently asked questions

Is December cold in Hanley Hills?

In December, in Hanley Hills, the average high-temperature is 42.6°F (5.9°C), and the average low-temperature is 30.6°F (-0.8°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in August is appraised at 95°F (35°C).

What is the average humidity in December in Hanley Hills?

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

How much does it rain in Hanley Hills in December?

In December, in Hanley Hills, the rain falls for 7.5 days. Throughout December, 2.05" (52mm) of precipitation is accumulated.

How much does it snow in Hanley Hills in December?

In December, in Hanley Hills, it is snowing for 3.1 days. Throughout December, 1.85" (47mm) of snow is accumulated.

What is the month with the shortest days in Hanley Hills?

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

What is the average length of the day in December in Hanley Hills?

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

When are sunrise and sunset in December in Hanley Hills?

In December, on the first day of the month, sunrise is at 7:00 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 many hours of sunshine does Hanley Hills have in December?

In Hanley Hills, Missouri, the average sunshine duration in December is 4.9h.

When is the lowest UV index in Hanley Hills?

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

What is the UV index intensity in December in Hanley Hills?

In Hanley Hills, Missouri, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low health risk 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
Hanley Hills, MO

Average temperature in December - Hanley Hills, MO
  • Average high temperature in December: 42.6°F

The warmest month (with the highest average high temperature) is July (86.9°F).
The month with the lowest average high temperature is January (37.8°F).

  • Average low temperature in December: 30.6°F

The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).

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Average pressure in December
Hanley Hills, MO

Average pressure in December - Hanley Hills, 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
Hanley Hills, MO

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

The windiest month (with the highest average wind speed) is January (9.2mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).

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Average humidity in December
Hanley Hills, MO

Average humidity in December - Hanley Hills, MO
  • Average humidity in December: 76%

The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (70%).

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Average rainfall in December
Hanley Hills, MO

Average rainfall in December - Hanley Hills, MO
  • Average rainfall in December: 2.05"

The wettest month (with the highest rainfall) is May (3.58").
The driest month (with the least rainfall) is February (1.69").

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Average rainfall days in December
Hanley Hills, MO

Average rainfall days in December - Hanley Hills, MO
  • Average rainfall days in December: 7.5 days

The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is January (6.5 days).

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Average snowfall in December
Hanley Hills, MO

Average snowfall in December - Hanley Hills, MO
  • Average snowfall in December: 1.85"

The month with the highest snowfall is February (2.6").
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
Hanley Hills, MO

Average snowfall days in December - Hanley Hills, MO
  • Average snowfall days in December: 3.1 days

The month with the highest number of snowfall days is February (5.2 days).
The months with the least snowfall days are May, June, July and August (0 days).

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Average daylight in December /
Average sunshine in December
Hanley Hills, MO

Average daylight in December / Average sunshine in December - Hanley Hills, 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 months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).

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Average sunshine days in December
Hanley Hills, MO

Average sunshine days in December - Hanley Hills, MO
  • Average sunshine days in December: 19.9 days

The month with the most sunshine days is January (21 days).
The month with the least sunshine days is June (11.2 days).

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Average UV index in December
Hanley Hills, MO

Average UV index in December - Hanley Hills, 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
Hanley Hills, MO

Average cloud cover in December - Hanley Hills, 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
Hanley Hills, MO

Average visibility in December - Hanley Hills, 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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Hanley Hills, Missouri, USA

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