December weather forecast
Salem, MO

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Weather in December

December, the first month of the winter in Salem, is still a chilly month, with an average temperature varying between 43.5°F (6.4°C) and 29.7°F (-1.3°C).

Temperature

With December's arrival, Salem's weather changes as the average high-temperature falls from a cool 53.4°F (11.9°C) in November to a chilly 43.5°F (6.4°C). Salem, during the month of December, experiences an average low-temperature of 29.7°F (-1.3°C).

Humidity

In Salem, the average relative humidity in December is 78%.

Rainfall

In Salem, Missouri, during December, the rain falls for 8.2 days and regularly aggregates up to 2.28" (58mm) of precipitation. Throughout the year, there are 151.7 rainfall days, and 33.98" (863mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall. In Salem, during December, snow falls for 4.5 days and regularly aggregates up to 1.65" (42mm) of snow. In Salem, during the entire year, snow falls for 24 days and aggregates up to 10.98" (279mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 36min of daylight.
On the first day of December, sunrise is at 7:03 am and sunset at 4:47 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:57 pm CST.

Sunshine

In December, the average sunshine is 4.9h.

UV index

The months with the lowest UV index are January, February, November 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 rays for the average person.
Note: In December, the UV index of 2 transforms into the following advice:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. To protect against the Sun's most potent rays, avoid direct exposure around midday. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Updated: Aug 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it cold during December?

Salem in December has an average high-temperature of 43.5°F (6.4°C) and an average low-temperature of 29.7°F (-1.3°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which represents the influence of relative humidity on air temperature, in August is estimated at 98.6°F (37°C).

What is the average humidity in December?

In December, the average relative humidity is 78%.

How much does it rain in December?

In Salem, during December, the rain falls for 8.2 days and regularly aggregates up to 2.28" (58mm) of precipitation.

How many days does it snow in December in Salem?

In Salem, during December, snow falls for 4.5 days and regularly aggregates up to 1.65" (42mm) of snow.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 36min of daylight.

How many hours of daylight does Salem have in December?

In December, the average day length is 9h and 37min.

When is the sunrise / sunset in December?

On the first day of December, sunrise is at 7:03 am and sunset at 4:47 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:57 pm CST.

How many hours of sunshine does Salem have in December?

In December, the average sunshine duration is 4.9h.

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

Average temperature in December - Salem, MO
  • Average high temperature in December: 43.5°F

The warmest month (with the highest average high temperature) is July (88.5°F).
The month with the lowest average high temperature is January (39.9°F).

  • Average low temperature in December: 29.7°F

The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).

Average pressure in December
Salem, MO

Average pressure in December - Salem, 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 (29.93"Hg).

Average wind speed in December
Salem, MO

Average wind speed in December - Salem, MO
  • Average wind speed in December: 7.8mph

The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).

Average humidity in December
Salem, MO

Average humidity in December - Salem, MO
  • Average humidity in December: 78%

The month with the highest relative humidity is March (79%).
The month with the lowest relative humidity is October (74%).

Average rainfall in December
Salem, MO

Average rainfall in December - Salem, MO
  • Average rainfall in December: 2.28"

The wettest month (with the highest rainfall) is May (4.13").
The driest month (with the least rainfall) is September (1.93").

Average rainfall days in December
Salem, MO

Average rainfall days in December - Salem, MO
  • Average rainfall days in December: 8.2 days

The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (7.8 days).

Average snowfall in December
Salem, MO

Average snowfall in December - Salem, MO
  • Average snowfall in December: 1.65"

The month with the highest snowfall is February (4.25").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Salem, MO

Average snowfall days in December - Salem, MO
  • Average snowfall days in December: 4.5 days

The months with the highest number of snowfall days are January and February (6.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Salem, 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 36min).

  • Average sunshine in December: 4h and 5min

The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

Average sunshine days in December
Salem, MO

Average sunshine days in December - Salem, MO
  • Average sunshine days in December: 18.2 days

The month with the most sunshine days is October (18.9 days).
The month with the least sunshine days is July (11.3 days).

Average UV index in December
Salem, MO

Average UV index in December - Salem, 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, November and December (UV index 2).

Average cloud cover in December
Salem, MO

Average cloud cover in December - Salem, MO
  • Average cloud cover in December: 49

The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 31).

Average visibility in December
Salem, MO

Average visibility in December - Salem, MO
  • Average visibility in December: 6mi

The months with the highest visibility are February, March, April, June, October, November and December (6mi).
The months with the lowest visibility are January, May, July, August and September (5mi).

Salem, Missouri, USA

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