December weather forecast and climate
Martinsville, MO

The first month of the winter, December, is still a cold month in Martinsville, Missouri, with average temperature varying between 37°F (2.8°C) and 24.1°F (-4.4°C).

Temperature

In December, the average high-temperature decreases, from a chilly 49.6°F (9.8°C) in November, to a wintry 37°F (2.8°C). In December, the average low-temperature is 24.1°F (-4.4°C).

Humidity

The average relative humidity is 78%.

Rainfall

In December, the rain falls for 5.4 days. Throughout December, 0.94" (24mm) of precipitation is accumulated. In Martinsville, Missouri, during the entire year, the rain falls for 129.2 days and collects up to 25.35" (644mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Martinsville. In December, in Martinsville, Missouri, it is snowing for 4.7 days. Throughout December, 1.42" (36mm) of snow is accumulated. In Martinsville, during the entire year, snow falls for 26.5 days, and aggregates up to 12.64" (321mm) of snow.

Daylight

December has the shortest days of the year in Martinsville, with an average of 9.3h of daylight.

Sunshine

In Martinsville, the average sunshine is 5h.

UV index

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 low health risk from unsafe exposure to the UV radiation for ordinary individuals.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in December in Martinsville?

The average high-temperature, in December, in Martinsville, Missouri, is 37°F (2.8°C), while the average low-temperature is 24.1°F (-4.4°C).

What is the average humidity in December in Martinsville?

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

How much does it rain in Martinsville in December?

In December, in Martinsville, the rain falls for 5.4 days. Throughout December, 0.94" (24mm) of precipitation is accumulated.

How many days does it snow in December in Martinsville?

In December, it is snowing for 4.7 days. Throughout December, 1.42" (36mm) of snow is accumulated.

What is the month with the shortest days in Martinsville?

The month with the shortest days in Martinsville, Missouri, is December, with an average of 9.3h of daylight.

How many hours of daylight does Martinsville have in December?

In Martinsville, the average length of the day in December is 9.3h.

How many hours of sunshine does Martinsville have in December?

In December, the average sunshine in Martinsville, Missouri, is 5h.

When is the lowest UV index in Martinsville?

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 Martinsville?

The average daily maximum UV index in December in Martinsville, Missouri, is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in December - Martinsville, MO
  • Average high temperature in December: 2.8°C

The warmest month (with the highest average high temperature) is July (29.2°C).
The month with the lowest average high temperature is January (0.3°C).

  • Average low temperature in December: -4.4°C

The month with the highest average low temperature is July (19.3°C).
The coldest month (with the lowest average low temperature) is January (-7.4°C).

Average pressure in December - Martinsville, MO
  • Average pressure in December: 1020.2mbar

The month with the highest atmospheric pressure is January (1021.6mbar).
The month with the lowest atmospheric pressure is June (1012mbar).

Average wind speed in December - Martinsville, MO
  • Average wind speed in December: 15.1km/h

The windiest month (with the highest average wind speed) is March (16.1km/h).
The calmest month (with the lowest average wind speed) is August (10.3km/h).

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

The month with the highest relative humidity is June (81%).
The month with the lowest relative humidity is October (71%).

Average rainfall in December - Martinsville, MO
  • Average rainfall in December: 24mm

The wettest month (with the highest rainfall) is June (98mm).
The driest months (with the least rainfall) are January and February (23mm).

Average rainfall days in December - Martinsville, MO
  • Average rainfall days in December: 5.4 days

The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is January (4.1 days).

Average snowfall in December - Martinsville, MO
  • Average snowfall in December: 36mm

The month with the highest snowfall is January (92mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in December - Martinsville, MO
  • Average snowfall days in December: 4.7 days

The month with the highest number of snowfall days is January (8 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December / Average sunshine in December - Martinsville, MO
  • Average daylight in December: 9.3h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in December: 5h

The month with the most sunshine is July (Average sunshine: 10.4h).
The month with the least sunshine is January (Average sunshine: 4.6h).

Average sunshine days in December - Martinsville, MO
  • Average sunshine days in December: 20.3 days

The month with the most sunshine days is November (21.1 days).
The month with the least sunshine days is May (10.8 days).

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

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

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

Months with the most cloud cover are January and March (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 28).

Average visibility in December - Martinsville, MO
  • Average visibility in December: 9km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).