December weather forecast
Waco, MO

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Weather in December

The first month of the winter, December, is still a chilly month in Waco, Missouri, with an average temperature fluctuating between 45.7°F (7.6°C) and 31.5°F (-0.3°C).

Temperature

With December's arrival, Waco, Missouri, sees a decrease in average high-temperatures, moving from a refreshing 56.1°F (13.4°C) in November to a chilly 45.7°F (7.6°C). December's average low-temperature reading settles at a subzero cold 31.5°F (-0.3°C).

Humidity

The average relative humidity in December is 73%.

Rainfall

In Waco, during December, the rain falls for 7.2 days and regularly aggregates up to 1.46" (37mm) of precipitation. In Waco, during the entire year, the rain falls for 140.3 days and collects up to 30.12" (765mm) of precipitation.

Snowfall

Months with snowfall are January through March, May, November and December. In Waco, Missouri, in December, during 1.8 snowfall days, 0.39" (10mm) of snow is typically accumulated. In Waco, during the entire year, snow falls for 10.9 days and aggregates up to 4.76" (121mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9h and 42min of daylight.
On the first day of December, sunrise is at 7:14 am and sunset at 5:01 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 5:11 pm CST.

Sunshine

In December, the average sunshine in Waco is 5.6h.

UV index

January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Waco, Missouri. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: In December, the maximum UV index of 2 suggests these recommendations:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are December temperatures in Waco?

In December, in Waco, the average high-temperature is 45.7°F (7.6°C), and the average low-temperature is 31.5°F (-0.3°C). In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which factors the actual air temperature with the relative humidity, is estimated at 100.4°F (38°C).

What is the average humidity in December in Waco?

In December, the average relative humidity in Waco is 73%.

How much does it rain in Waco in December?

In Waco, Missouri, in December, during 7.2 rainfall days, 1.46" (37mm) of precipitation is typically accumulated.

How many days does it snow in December in Waco?

In December, in Waco, Missouri, it is snowing for 1.8 days. Throughout December, 0.39" (10mm) of snow is accumulated.

What is the month with the shortest days in Waco?

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

How many hours of daylight does Waco have in December?

In December, the average day length in Waco, Missouri, is 9h and 39min.

When are sunrise and sunset in December in Waco?

On the first day of December in Waco, Missouri, sunrise is at 7:14 am and sunset at 5:01 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 5:11 pm CST.

How long on average sun shines in December in Waco?

In December, the average sunshine duration in Waco is 5.6h.

When is the lowest UV index in Waco?

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

How high is the UV index in December in Waco?

The average daily maximum UV index in December in Waco is 2. A UV Index of 2, and less, symbolizes a low health threat from unprotected exposure to 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
Waco, MO

Average temperature in December - Waco, MO
  • Average high temperature in December: 45.7°F

The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (42.4°F).

  • Average low temperature in December: 31.5°F

The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (27.3°F).

Average pressure in December
Waco, MO

Average pressure in December - Waco, 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 (29.91"Hg).

Average wind speed in December
Waco, MO

Average wind speed in December - Waco, MO
  • Average wind speed in December: 9.6mph

The windiest months (with the highest average wind speed) are March and April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).

Average humidity in December
Waco, MO

Average humidity in December - Waco, MO
  • Average humidity in December: 73%

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

Average rainfall in December
Waco, MO

Average rainfall in December - Waco, MO
  • Average rainfall in December: 1.46"

The wettest month (with the highest rainfall) is May (5.12").
The driest month (with the least rainfall) is January (1.42").

Average rainfall days in December
Waco, MO

Average rainfall days in December - Waco, MO
  • Average rainfall days in December: 7.2 days

The month with the highest number of rainy days is May (16.4 days).
The month with the least rainy days is January (7 days).

Average snowfall in December
Waco, MO

Average snowfall in December - Waco, MO
  • Average snowfall in December: 0.39"

The month with the highest snowfall is February (2.2").
The months with the least snowfall are April, June, July, August, September and October (0").

Average snowfall days in December
Waco, MO

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

The month with the highest number of snowfall days is February (3.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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

Average daylight in December / Average sunshine in December - Waco, 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 4min

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 30min).

Average sunshine days in December
Waco, MO

Average sunshine days in December - Waco, MO
  • Average sunshine days in December: 21.7 days

The month with the most sunshine days is December (21.7 days).
The month with the least sunshine days is May (12.7 days).

Average UV index in December
Waco, MO

Average UV index in December - Waco, 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, February and December (UV index 2).

Average cloud cover in December
Waco, MO

Average cloud cover in December - Waco, MO
  • Average cloud cover in December: 38

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

Average visibility in December
Waco, MO

Average visibility in December - Waco, 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).

Waco, Missouri, USA

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