December weather forecast
Diamond, MO

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Weather in December

The first month of the winter, December, is still a chilly month in Diamond, Missouri, with an average temperature fluctuating between 46.2°F (7.9°C) and 31.3°F (-0.4°C).

Temperature

The onset of December comes with a shift in the average high-temperature, falling from a mild 56.3°F (13.5°C) in November to a frosty 46.2°F (7.9°C). During December, the nighttime temperature averages of 31.3°F (-0.4°C).

Humidity

In Diamond, the average relative humidity in December is 74%.

Rainfall

The months with the least rainfall in Diamond are February and December Rain falls for 5.1 days and accumulates 0.59" (15mm) of rain.

Snowfall

Months with snowfall are January through March, May, November and December. In Diamond, in December, during 1.8 snowfall days, 0.16" (4mm) of snow is typically accumulated. Throughout the year, there are 8.5 snowfall days, and 1.14" (29mm) of snow is accumulated.

Daylight

With an average of 9h and 42min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:12 am and sunset at 5:00 pm. On the last day of December, in Diamond, sunrise is at 7:30 am and sunset at 5:10 pm CST.

Sunshine

In Diamond, the average sunshine in December is 5.5h.

UV index

The months with the lowest UV index are January and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The daily high UV index of 2 during December translates into the following recommendations:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Updated: Jun 22, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average December temperature?

In December, in Diamond, the average high-temperature is 46.2°F (7.9°C), and the average low-temperature is 31.3°F (-0.4°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines air temperature and relative humidity, in September is appraised at 84.2°F (29°C).

What is the average humidity in December?

In December, the average relative humidity is 74%.

What is the driest month?

February and December are months with the least rain when the rain falls for 5.1 days and typically aggregates up to 0.59" (15mm) of rain.

How much does it rain in December?

In December, the rain falls for 5.1 days. Throughout December, 0.59" (15mm) of precipitation is accumulated.

How many days does it snow in December?

In December, it is snowing for 1.8 days. Throughout December, 0.16" (4mm) of snow is accumulated.

What is the month with the shortest days in Diamond?

December has the shortest days of the year, with an average of 9h and 42min of daylight.

How many hours of daylight does Diamond have in December?

The average day length in December is 9h and 40min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 7:12 am and sunset at 5:00 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 5:10 pm CST.

How many hours of sunshine does Diamond have in December?

In December, the average sunshine duration is 5.5h.

What is the month with the lowest UV index?

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

What is the UV index intensity in December?

In December, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a minimal hazard to health 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
Diamond, MO

Average temperature in December - Diamond, MO
  • Average high temperature in December: 46.2°F

The warmest month (with the highest average high temperature) is July (89.4°F).
The month with the lowest average high temperature is January (43.2°F).

  • Average low temperature in December: 31.3°F

The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (27.9°F).

Average pressure in December
Diamond, MO

Average pressure in December - Diamond, MO
  • Average pressure in December: 30.14"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in December
Diamond, MO

Average wind speed in December - Diamond, MO
  • Average wind speed in December: 9.1mph

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).

Average humidity in December
Diamond, MO

Average humidity in December - Diamond, MO
  • Average humidity in December: 74%

The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are August and October (71%).

Average rainfall in December
Diamond, MO

Average rainfall in December - Diamond, MO
  • Average rainfall in December: 0.59"

The wettest month (with the highest rainfall) is May (2.24").
The driest months (with the least rainfall) are February and December (0.59").

Average rainfall days in December
Diamond, MO

Average rainfall days in December - Diamond, MO
  • Average rainfall days in December: 5.1 days

The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is December (5.1 days).

Average snowfall in December
Diamond, MO

Average snowfall in December - Diamond, MO
  • Average snowfall in December: 0.16"

The month with the highest snowfall is February (0.47").
The months with the least snowfall are April, June, July, August, September and October (0").

Average snowfall days in December
Diamond, MO

Average snowfall days in December - Diamond, MO
  • Average snowfall days in December: 1.8 days

The month with the highest number of snowfall days is February (3.1 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Diamond, MO
  • Average daylight in December: 9h and 4min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in December: 5h and 3min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).

Average sunshine days in December
Diamond, MO

Average sunshine days in December - Diamond, MO
  • Average sunshine days in December: 23.7 days

The month with the most sunshine days is December (23.7 days).
The month with the least sunshine days is May (14.1 days).

Average UV index in December
Diamond, MO

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

The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January and December (UV index 2).

Average cloud cover in December
Diamond, MO

Average cloud cover in December - Diamond, MO
  • Average cloud cover in December: 40

The months with the most cloud cover are February and March (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 24).

Average visibility in December
Diamond, MO

Average visibility in December - Diamond, 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).

Diamond, Missouri, USA

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