December weather forecast
Petersburg, IN

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Weather in December

The first month of the winter, December, is also an icy month in Petersburg, Indiana, with temperature in the range of an average low of 31.3°F (-0.4°C) and an average high of 42.6°F (5.9°C).

Temperature

In Petersburg, the beginning of December is marked by a lowered average high-temperature, shifting from November's cool 52.7°F (11.5°C) to an icy 42.6°F (5.9°C). During the nights in December, Petersburg experiences a consistent average temperature of 31.3°F (-0.4°C).

Humidity

In Petersburg, the average relative humidity in December is 79%.

Rainfall

In Petersburg, in December, during 10.4 rainfall days, 2.05" (52mm) of precipitation is typically accumulated. Throughout the year, there are 151.2 rainfall days, and 26.3" (668mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, November and December. In Petersburg, during December, snow falls for 5.4 days and regularly aggregates up to 0.71" (18mm) of snow. In Petersburg, during the entire year, snow falls for 23.8 days and aggregates up to 5.08" (129mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 30min of daylight.
On the first day of December, sunrise is at 7:48 am and sunset at 5:28 pm. On the last day of the month, sunrise is at 8:06 am and sunset at 5:38 pm EST.

Sunshine

December has the least sunshine of the year, with an average of 4.4h of sunshine.

UV index

The months with the lowest UV index in Petersburg are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index of 2 during December translates into the following directions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Updated: Jun 15, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December?

The high-temperature during December is 42.6°F (5.9°C) and the low-temperature is 31.3°F (-0.4°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines air temperature and relative humidity, in August is estimated at 93.2°F (34°C).

What is the average humidity in December?

In December, the average relative humidity is 79%.

How much does it rain in Petersburg in December?

In Petersburg, during December, the rain falls for 10.4 days and regularly aggregates up to 2.05" (52mm) of precipitation.

How much does it snow in December?

In Petersburg, in December, during 5.4 snowfall days, 0.71" (18mm) of snow is typically accumulated.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 30min of daylight.

What is the average length of the day in December?

The average day length in December is 9h and 32min.

When is the sunrise / sunset in December?

On the first day of December, sunrise is at 7:48 am and sunset at 5:28 pm. On the last day of the month, sunrise is at 8:06 am and sunset at 5:38 pm EST.

What is the month with the least sunshine?

The month with the least sunshine is December, with an average of 4.4h of sunshine.

How long on average sun shines in December?

The average sunshine duration in December is 4.4h.

What is the month with the lowest UV index?

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.

What is the UV index reading in December?

The average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from 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
Petersburg, IN

Average temperature in December - Petersburg, IN
  • Average high temperature in December: 42.6°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (37.9°F).

  • Average low temperature in December: 31.3°F

The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is January (25°F).

Average pressure in December
Petersburg, IN

Average pressure in December - Petersburg, IN
  • Average pressure in December: 30.14"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in December
Petersburg, IN

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

The windiest months (with the highest average wind speed) are January, February and April (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).

Average humidity in December
Petersburg, IN

Average humidity in December - Petersburg, IN
  • Average humidity in December: 79%

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

Average rainfall in December
Petersburg, IN

Average rainfall in December - Petersburg, IN
  • Average rainfall in December: 2.05"

The wettest month (with the highest rainfall) is April (3.19").
The driest month (with the least rainfall) is September (1.38").

Average rainfall days in December
Petersburg, IN

Average rainfall days in December - Petersburg, IN
  • Average rainfall days in December: 10.4 days

The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is November (9.2 days).

Average snowfall in December
Petersburg, IN

Average snowfall in December - Petersburg, IN
  • Average snowfall in December: 0.71"

The month with the highest snowfall is January (1.85").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Petersburg, IN

Average snowfall days in December - Petersburg, IN
  • Average snowfall days in December: 5.4 days

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

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

Average daylight in December / Average sunshine in December - Petersburg, IN
  • Average daylight in December: 9h and 3min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in December: 4h and 2min

The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 4h and 24min).

Average sunshine days in December
Petersburg, IN

Average sunshine days in December - Petersburg, IN
  • Average sunshine days in December: 15.4 days

The month with the most sunshine days is October (18.7 days).
The month with the least sunshine days is May (9.8 days).

Average UV index in December
Petersburg, IN

Average UV index in December - Petersburg, IN
  • 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
Petersburg, IN

Average cloud cover in December - Petersburg, IN
  • Average cloud cover in December: 53

The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are June and August (Cloud cover 29).

Average visibility in December
Petersburg, IN

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

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

Petersburg, Indiana, USA

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