December weather forecast
Henley, MO

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Weather in December

The first month of the winter, December, is still a chilly month in Henley, Missouri, with an average temperature ranging between max 43°F (6.1°C) and min 29.3°F (-1.5°C).

Temperature

Transition from November to December is accompanied by a temperature drop, with average high-temperatures decreasing from a fresh 53.8°F (12.1°C) to a frosty 43°F (6.1°C). Henley cools down to an average low-temperature of 29.3°F (-1.5°C) throughout the month of December.

Humidity

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

Rainfall

In December, the rain falls for 6.7 days. Throughout December, 1.42" (36mm) of precipitation is accumulated. Throughout the year, in Henley, there are 136.8 rainfall days, and 26.18" (665mm) of precipitation is accumulated.

Snowfall

January through May, November and December are months with snowfall. In Henley, Missouri, in December, snow falls for 5 days, with typically accumulated 1.42" (36mm) of snow. In Henley, during the entire year, snow falls for 23.2 days and aggregates up to 8.03" (204mm) of snow.

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 7:08 am and sunset at 4:49 pm. On the last day of December, sunrise is at 7:26 am and sunset at 4:59 pm CST.

Sunshine

In Henley, the average sunshine in December is 5h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the average person.
Note: The daily maximum UV index of 2 in December interprets into the following advice:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Updated: Aug 20, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold does it get in December?

In Henley, in December, the average high-temperature is 43°F (6.1°C), and the average low-temperature is 29.3°F (-1.5°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in August is appraised at 98.6°F (37°C).

What is the average humidity in December?

In December, the average relative humidity is 76%.

How many days does it rain in December?

In Henley, during December, the rain falls for 6.7 days and regularly aggregates up to 1.42" (36mm) of precipitation.

How much does it snow in December?

In Henley, in December, snow falls for 5 days, with typically accumulated 1.42" (36mm) of snow.

What is the month with the shortest days?

With an average of 9h and 30min of daylight, December has the shortest days of the year.

How many hours of daylight does Henley have in December?

In Henley, the average day length in December is 9h and 33min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 7:08 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:59 pm CST.

How long on average sun shines in December in Henley?

In December, the average sunshine duration is 5h.

What is the month with the lowest UV index?

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

How high is the UV index in December?

In Henley, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from 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
Henley, MO

Average temperature in December - Henley, MO
  • Average high temperature in December: 43°F

The warmest month (with the highest average high temperature) is July (88.9°F).
The month with the lowest average high temperature is January (38.8°F).

  • Average low temperature in December: 29.3°F

The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).

Average pressure in December
Henley, MO

Average pressure in December - Henley, 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).

Average wind speed in December
Henley, MO

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

The windiest months (with the highest average wind speed) are January and March (8.9mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).

Average humidity in December
Henley, MO

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

The month with the highest relative humidity is May (77%).
The months with the lowest relative humidity are August and October (73%).

Average rainfall in December
Henley, MO

Average rainfall in December - Henley, MO
  • Average rainfall in December: 1.42"

The wettest month (with the highest rainfall) is May (3.58").
The driest month (with the least rainfall) is January (1.18").

Average rainfall days in December
Henley, MO

Average rainfall days in December - Henley, MO
  • Average rainfall days in December: 6.7 days

The month with the highest number of rainy days is May (16.3 days).
The months with the least rainy days are January and December (6.7 days).

Average snowfall in December
Henley, MO

Average snowfall in December - Henley, MO
  • Average snowfall in December: 1.42"

The month with the highest snowfall is February (2.8").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in December
Henley, MO

Average snowfall days in December - Henley, MO
  • Average snowfall days in December: 5 days

The month with the highest number of snowfall days is February (7 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Henley, MO

Average daylight in December / Average sunshine in December - Henley, 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: 5h and 0min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The months with the least sunshine are January and February (Average sunshine: 4h and 54min).

Average sunshine days in December
Henley, MO

Average sunshine days in December - Henley, MO
  • Average sunshine days in December: 19.5 days

The month with the most sunshine days is December (19.5 days).
The month with the least sunshine days is May (11.8 days).

Average UV index in December
Henley, MO

Average UV index in December - Henley, MO
  • Average UV index in December: 2

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

Average cloud cover in December
Henley, MO

Average cloud cover in December - Henley, MO
  • Average cloud cover in December: 45

The months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 28).

Average visibility in December
Henley, MO

Average visibility in December - Henley, 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).

Henley, Missouri, USA

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