December weather forecast
Martinsville, IN

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Weather in December

December, the first month of the winter in Martinsville, is also an icy month, with an average temperature fluctuating between 28.6°F (-1.9°C) and 39.7°F (4.3°C).

Temperature

Arrival of December comes with a reduction in the average high-temperature, falling from a fresh 50°F (10°C) in November to an icy 39.7°F (4.3°C). December brings with it a nighttime average temperature of 28.6°F (-1.9°C) in Martinsville.

Humidity

In Martinsville, the average relative humidity in December is 82%.

Rainfall

In Martinsville, Indiana, in December, during 10.9 rainfall days, 2.13" (54mm) of precipitation is typically accumulated. In Martinsville, during the entire year, the rain falls for 160.4 days and collects up to 27.05" (687mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall in Martinsville. In Martinsville, in December, snow falls for 7.5 days, with typically accumulated 2.13" (54mm) of snow. Throughout the year, in Martinsville, there are 33.2 snowfall days, and 8.27" (210mm) of snow is accumulated.

Daylight

With an average of 9h and 24min of daylight, December has the shortest days of the year in Martinsville, Indiana.
On the first day of the month, sunrise is at 7:47 am and sunset at 5:22 pm. On the last day of December, in Martinsville, Indiana, sunrise is at 8:05 am and sunset at 5:32 pm EST.

Sunshine

December has the least sunshine of the year, with an average of 4.1h of sunshine.

UV index

January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Martinsville. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
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Frequently asked questions

Is December cold in Martinsville?

In December, in Martinsville, the average high-temperature is 39.7°F (4.3°C), and the average low-temperature is 28.6°F (-1.9°C). In August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is appraised at 87.8°F (31°C).

What is the average humidity in December in Martinsville?

The average relative humidity in December in Martinsville, Indiana, is 82%.

How much does it rain in Martinsville in December?

In Martinsville, Indiana, in December, it is raining for 10.9 days, with typically 2.13" (54mm) of accumulated precipitation.

How much does it snow in Martinsville in December?

In Martinsville, in December, snow falls for 7.5 days, with typically accumulated 2.13" (54mm) of snow.

What is the month with the shortest days in Martinsville?

With an average of 9h and 24min of daylight, December has the shortest days of the year.

How many hours of daylight does Martinsville have in December?

In December, the average day length in Martinsville is 9h and 26min.

When are sunrise and sunset in December in Martinsville?

On the first day of December, sunrise is at 7:47 am and sunset at 5:22 pm. On the last day of the month, sunrise is at 8:05 am and sunset at 5:32 pm EST.

What is the month with the least sunshine in Martinsville?

With an average of 4.1h of sunshine, December has the least sunshine of the year in Martinsville.

How long on average sun shines in December in Martinsville?

In December, the average sunshine duration in Martinsville, Indiana, is 4.1h.

What is the month with the lowest UV index in Martinsville?

The months with the lowest UV index in Martinsville, Indiana, are January, February, October through December, with an average maximum UV index of 2.

What is the UV index reading in December in Martinsville?

In December, the average daily maximum UV index in Martinsville, Indiana, is 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's 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
Martinsville, IN

Average temperature in December - Martinsville, IN
  • Average high temperature in December: 39.7°F

The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (34.3°F).

  • Average low temperature in December: 28.6°F

The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).

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Average pressure in December
Martinsville, IN

Average pressure in December - Martinsville, IN
  • Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in December
Martinsville, IN

Average wind speed in December - Martinsville, IN
  • Average wind speed in December: 8.6mph

The windiest month (with the highest average wind speed) is February (9.5mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

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Average humidity in December
Martinsville, IN

Average humidity in December - Martinsville, IN
  • Average humidity in December: 82%

The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (75%).

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Average rainfall in December
Martinsville, IN

Average rainfall in December - Martinsville, IN
  • Average rainfall in December: 2.13"

The wettest month (with the highest rainfall) is May (3.23").
The driest month (with the least rainfall) is September (1.65").

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Average rainfall days in December
Martinsville, IN

Average rainfall days in December - Martinsville, IN
  • Average rainfall days in December: 10.9 days

The month with the highest number of rainy days is May (19.4 days).
The month with the least rainy days is February (8.6 days).

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Average snowfall in December
Martinsville, IN

Average snowfall in December - Martinsville, IN
  • Average snowfall in December: 2.13"

The month with the highest snowfall is January (2.24").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in December
Martinsville, IN

Average snowfall days in December - Martinsville, IN
  • Average snowfall days in December: 7.5 days

The month with the highest number of snowfall days is January (10.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Martinsville, IN

Average daylight in December / Average sunshine in December - Martinsville, IN
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in December: 4h and 1min

The month with the most sunshine is June (Average sunshine: 10h and 0min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).

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Average sunshine days in December
Martinsville, IN

Average sunshine days in December - Martinsville, IN
  • Average sunshine days in December: 14 days

The month with the most sunshine days is October (17.5 days).
The month with the least sunshine days is May (9.3 days).

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Average UV index in December
Martinsville, IN

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

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

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Average cloud cover in December
Martinsville, IN

Average cloud cover in December - Martinsville, IN
  • Average cloud cover in December: 56

The months with the most cloud cover are January and February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 31).

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Average visibility in December
Martinsville, IN

Average visibility in December - Martinsville, IN
  • Average visibility in December: 5mi

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

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Martinsville, Indiana, USA

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