December weather forecast
Greensburg, IN

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Weather in December

The final month of the year, December, welcomes winter back to Greensburg. The brisk and chilly climate marks a stark contrast to the rain-soaked November highs of 50°F (10°C). Having bid farewell to autumn, residents of the city prepare for the white winter ahead. In between holiday preparations and closing out the year, the town of Greensburg shares in a peaceful, communal spirit.

Temperature

December brings a decrease in the average high-temperature, shifting from a fresh 50°F (10°C) in November to an icy 40.1°F (4.5°C). Greensburg records an average low of 29.3°F (-1.5°C) throughout the nights in December.

Humidity

January and December, with an average relative humidity of 82%, are the most humid months in Greensburg.

Rainfall

In December, in Greensburg, the rain falls for 10.7 days. Throughout December, 2.32" (59mm) of precipitation is accumulated. Throughout the year, in Greensburg, there are 161.3 rainfall days, and 31.26" (794mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Greensburg are January through April, October through December. In December, it is snowing for 7.8 days. Throughout December, 1.77" (45mm) of snow is accumulated. In Greensburg, during the entire year, snow falls for 35 days and aggregates up to 10.67" (271mm) of snow.

Daylight

With an average of 9h and 30min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:43 am and sunset at 5:19 pm. On the last day of December, in Greensburg, sunrise is at 8:01 am and sunset at 5:28 pm EST.

Sunshine

In December, the average sunshine is 4h.

UV index

The month with the lowest UV index in Greensburg is December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the ordinary person.
Note: The daily high UV index of 1 in December translates into this advice:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
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Frequently asked questions

Is December cold in Greensburg?

During December, Greensburg experiences an average high-temperature of 40.1°F (4.5°C) and a low-temperature of 29.3°F (-1.5°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in August is computed to be 87.8°F (31°C).

What are the most humid months in Greensburg?

The months with the highest humidity in Greensburg, Indiana, are January and December, with an average relative humidity of 82%.

What is the average humidity in December in Greensburg?

The average relative humidity in December is 82%.

How many days does it rain in December in Greensburg?

In Greensburg, in December, it is raining for 10.7 days, with typically 2.32" (59mm) of accumulated precipitation.

How many days does it snow in December in Greensburg?

In Greensburg, in December, during 7.8 snowfall days, 1.77" (45mm) of snow is typically accumulated.

What is the month with the shortest days in Greensburg?

With an average of 9h and 30min of daylight, December has the shortest days of the year in Greensburg.

How many hours of daylight does Greensburg have in December?

The average day length in December in Greensburg is 9h and 27min.

When is the sunrise / sunset in December in Greensburg?

On the first day of December in Greensburg, Indiana, sunrise is at 7:43 am and sunset at 5:19 pm. On the last day of the month, sunrise is at 8:01 am and sunset at 5:28 pm EST.

How long on average sun shines in December in Greensburg?

In Greensburg, the average sunshine duration in December is 4h.

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

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

How high is the UV index in December in Greensburg?

In Greensburg, Indiana, the average daily maximum UV index in December is 1. A UV Index of 2, and less, symbolizes 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
Greensburg, IN

Average temperature in December - Greensburg, IN
  • Average high temperature in December: 40.1°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (34.7°F).

  • Average low temperature in December: 29.3°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).

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Average pressure in December
Greensburg, IN

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

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

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Average wind speed in December
Greensburg, IN

Average wind speed in December - Greensburg, IN
  • Average wind speed in December: 8.9mph

The windiest month (with the highest average wind speed) is January (9.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.6mph).

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Average humidity in December
Greensburg, IN

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

The months with the highest relative humidity are January and December (82%).
The month with the lowest relative humidity is October (74%).

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Average rainfall in December
Greensburg, IN

Average rainfall in December - Greensburg, IN
  • Average rainfall in December: 2.32"

The wettest month (with the highest rainfall) is May (3.78").
The driest month (with the least rainfall) is September (1.97").

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Average rainfall days in December
Greensburg, IN

Average rainfall days in December - Greensburg, IN
  • Average rainfall days in December: 10.7 days

The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is February (8.4 days).

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Average snowfall in December
Greensburg, IN

Average snowfall in December - Greensburg, IN
  • Average snowfall in December: 1.77"

The month with the highest snowfall is February (2.64").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in December
Greensburg, IN

Average snowfall days in December - Greensburg, IN
  • Average snowfall days in December: 7.8 days

The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

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

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 30min).

  • Average sunshine in December: 4h and 0min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).

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Average sunshine days in December
Greensburg, IN

Average sunshine days in December - Greensburg, IN
  • Average sunshine days in December: 13.8 days

The month with the most sunshine days is November (16.8 days).
The month with the least sunshine days is May (9.9 days).

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Average UV index in December
Greensburg, IN

Average UV index in December - Greensburg, 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).

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Average cloud cover in December
Greensburg, IN

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

The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 30).

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Average visibility in December
Greensburg, IN

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

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

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Greensburg, Indiana, USA

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