December weather forecast
Hillisburg, IN

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Weather in December

December, the first month of the winter in Hillisburg, is also a wintry month, with an average temperature fluctuating between 37.6°F (3.1°C) and 27.3°F (-2.6°C).

Temperature

The arrival of December corresponds with a shift in temperature, down from a chilly 48.2°F (9°C) in November to a wintry 37.6°F (3.1°C). During December, Hillisburg records an average temperature of 27.3°F (-2.6°C) at night.

Humidity

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

Rainfall

In Hillisburg, during December, the rain falls for 7.4 days and regularly aggregates up to 1.14" (29mm) of precipitation. In Hillisburg, during the entire year, the rain falls for 139.5 days and collects up to 18.07" (459mm) of precipitation.

Snowfall

Months with snowfall are January through April, October through December. In Hillisburg, in December, during 5.3 snowfall days, 1.57" (40mm) of snow is typically accumulated. In Hillisburg, Indiana, during the entire year, snow falls for 28.4 days and aggregates up to 7.44" (189mm) of snow.

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 7:49 am and sunset at 5:19 pm. On the last day of December, sunrise is at 8:07 am and sunset at 5:29 pm EST.

Sunshine

In December, the average sunshine is 4.2h.

UV index

The months with the lowest UV index are January, February, October through December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: In December, a daily maximum UV index of 2 leads to the following instructions:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Updated: Jul 24, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it cold during December?

The average high-temperature and low-temperature during December are 37.6°F (3.1°C) and 27.3°F (-2.6°C) respectively. The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in July is evaluated at 87.8°F (31°C).

What is the average humidity in December?

The average relative humidity in December is 82%.

How many days does it rain in December?

In Hillisburg, in December, during 7.4 rainfall days, 1.14" (29mm) of precipitation is typically accumulated.

How much does it snow in December?

In Hillisburg, during December, snow falls for 5.3 days and regularly aggregates up to 1.57" (40mm) of snow.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 24min of daylight.

What is the average length of the day in December?

In Hillisburg, 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 7:49 am and sunset at 5:19 pm. On the last day of the month, sunrise is at 8:07 am and sunset at 5:29 pm EST.

How long on average sun shines in December?

In December, the average sunshine duration in Hillisburg is 4.2h.

What is the month with the lowest UV index?

January, February, October through 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 December, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to UV radiation.
Average high temperature
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
Hillisburg, IN

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

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (32°F).

  • Average low temperature in December: 27.3°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

Average pressure in December
Hillisburg, IN

Average pressure in December - Hillisburg, IN
  • Average pressure in December: 30.11"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
Hillisburg, IN

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

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

Average humidity in December
Hillisburg, IN

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

The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (73%).

Average rainfall in December
Hillisburg, IN

Average rainfall in December - Hillisburg, IN
  • Average rainfall in December: 1.14"

The wettest month (with the highest rainfall) is June (2.28").
The driest month (with the least rainfall) is February (0.94").

Average rainfall days in December
Hillisburg, IN

Average rainfall days in December - Hillisburg, IN
  • Average rainfall days in December: 7.4 days

The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (5.8 days).

Average snowfall in December
Hillisburg, IN

Average snowfall in December - Hillisburg, IN
  • Average snowfall in December: 1.57"

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

Average snowfall days in December
Hillisburg, IN

Average snowfall days in December - Hillisburg, IN
  • Average snowfall days in December: 5.3 days

The month with the highest number of snowfall days is January (8.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Hillisburg, 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 1min

The months with the most sunshine are June and July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

Average sunshine days in December
Hillisburg, IN

Average sunshine days in December - Hillisburg, IN
  • Average sunshine days in December: 18.5 days

The month with the most sunshine days is November (19 days).
The month with the least sunshine days is May (10.8 days).

Average UV index in December
Hillisburg, IN

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

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

Average cloud cover in December
Hillisburg, IN

Average cloud cover in December - Hillisburg, IN
  • Average cloud cover in December: 57

The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 32).

Average visibility in December
Hillisburg, IN

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

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

Hillisburg, Indiana, USA

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