December weather forecast
Thorntown, IN

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Weather in December

The first month of the winter, December, is still a cold month in Thorntown, Indiana, with temperature in the range of an average high of 37.6°F (3.1°C) and an average low of 27.1°F (-2.7°C).

Temperature

In the transition to December, Thorntown observes a drop in the average high-temperature, moving from a frosty 48°F (8.9°C) in November to a cold 37.6°F (3.1°C). Thorntown anticipates an average minimum temperature of 27.1°F (-2.7°C) in the month of December.

Humidity

January, July and December, with an average relative humidity of 83%, are the most humid months.

Rainfall

In Thorntown, Indiana, in December, during 9.1 rainfall days, 2.09" (53mm) of precipitation is typically accumulated. Throughout the year, there are 163.9 rainfall days, and 31.54" (801mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall. In Thorntown, in December, snow falls for 8.7 days, with typically accumulated 3.31" (84mm) of snow. Throughout the year, there are 40.6 snowfall days, and 13.46" (342mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 24min of daylight.
On the first day of the month, sunrise is at 7:50 am and sunset at 5:21 pm. On the last day of December, sunrise is at 8:08 am and sunset at 5:31 pm EST.

Sunshine

In December, the average sunshine is 4h.

UV index

December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 1 in December interprets into the following advice:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.

Frequently asked questions

How cold does it get in December?

In December, the average high-temperature and low-temperature are 37.6°F (3.1°C) and 27.1°F (-2.7°C) respectively. In July, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which factors the actual air temperature with the relative humidity, is evaluated at 87.8°F (31°C).

What is the most humid month?

January, July and December, with an average relative humidity of 83%, are most humid months.

What is the average humidity in December?

The average relative humidity in December is 83%.

How many days does it rain in December in Thorntown?

In Thorntown, in December, it is raining for 9.1 days, with typically 2.09" (53mm) of accumulated precipitation.

How many days does it snow in December?

In Thorntown, in December, snow falls for 8.7 days, with typically accumulated 3.31" (84mm) of snow.

What is the month with the shortest days?

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

What is the average length of the day in December in Thorntown?

In Thorntown, Indiana, the average day length in December is 9h and 22min.

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:50 am and sunset at 5:21 pm. On the last day of the month, sunrise is at 8:08 am and sunset at 5:31 pm EST.

How many hours of sunshine does Thorntown have in December?

The average sunshine duration in December is 4h.

When is the lowest UV index?

December is the month with the lowest UV index, with an average maximum UV index of 1.

What is the UV index reading in December?

The average daily maximum UV index in December is 1. A UV Index estimate of 2, and below, represents 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
Thorntown, IN

Average temperature in December - Thorntown, IN
  • Average high temperature in December: 37.6°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (32.2°F).

  • Average low temperature in December: 27.1°F

The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).

Average pressure in December
Thorntown, IN

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

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in December
Thorntown, IN

Average wind speed in December - Thorntown, IN
  • Average wind speed in December: 9.7mph

The windiest months (with the highest average wind speed) are January and February (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).

Average humidity in December
Thorntown, IN

Average humidity in December - Thorntown, IN
  • Average humidity in December: 83%

The months with the highest relative humidity are January, July and December (83%).
The month with the lowest relative humidity is October (74%).

Average rainfall in December
Thorntown, IN

Average rainfall in December - Thorntown, IN
  • Average rainfall in December: 2.09"

The wettest month (with the highest rainfall) is April (3.86").
The driest month (with the least rainfall) is February (1.85").

Average rainfall days in December
Thorntown, IN

Average rainfall days in December - Thorntown, IN
  • Average rainfall days in December: 9.1 days

The month with the highest number of rainy days is May (20.3 days).
The months with the least rainy days are January and February (7.8 days).

Average snowfall in December
Thorntown, IN

Average snowfall in December - Thorntown, IN
  • Average snowfall in December: 3.31"

The month with the highest snowfall is February (3.62").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Thorntown, IN

Average snowfall days in December - Thorntown, IN
  • Average snowfall days in December: 8.7 days

The month with the highest number of snowfall days is January (11.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

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

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in December: 4h and 0min

The month with the most sunshine is June (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

Average sunshine days in December
Thorntown, IN

Average sunshine days in December - Thorntown, IN
  • Average sunshine days in December: 13.9 days

The month with the most sunshine days is November (17 days).
The month with the least sunshine days is June (9.3 days).

Average UV index in December
Thorntown, IN

Average UV index in December - Thorntown, IN
  • Average UV index in December: 1

The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in December
Thorntown, IN

Average cloud cover in December - Thorntown, IN
  • Average cloud cover in December: 59

The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 33).

Average visibility in December
Thorntown, IN

Average visibility in December - Thorntown, IN
  • Average visibility in December: 6mi

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

Thorntown, Indiana, USA

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