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December Weather in Greensburg, United States

Last updated: June 24, 2025

In December, the average temperature in Greensburg, United States hovers around 3°C (38°F). Expect a chilly range, with minimums plummeting to -18°C (0°F) and maximums reaching a comfortable 19°C (66°F). Precipitation is moderate, with about 106 mm (4.2 in) spread over 10 days, and the air is notably humid, averaging 87%.

December Temperature in Greensburg

In December in Greensburg, the average temperature is 3°C (38°F), with maximums reaching 19°C (66°F) and minimums dropping as low as -18°C (0°F). This variety in temperatures makes it essential for travelers to pack layers to stay comfortable during their visit.

December Weather in Greensburg: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Greensburg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Greensburg, December typically has an average temperature of 3°C (38°F), with highs reaching up to 19°C (66°F) and lows dropping to around -18°C (0°F).
JanFebMarAprMayJunJulAugSepOctNovDec323544536573777470584337
Data source: Temperature data for Greensburg generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Greensburg

In Greensburg in December, the precipitation amount is 106 mm (4.2 in) over a span of 10 days.

December Precipitation Trends in Greensburg

The chart displays monthly precipitation patterns in Greensburg, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Greensburg, December typically receives around 106 mm (4.2 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec86116140122131128109948399104106
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Greensburg

In Greensburg in December humidity is 87%. With an average temperature of 3°C (38°F), this humidity feels like a chilly blanket wrapped around you, making travel quite uncomfortable as the cold dampness seeps into your clothes and lingers in the air, often leaving you shivering and longing for warmer, drier conditions.

December Average Humidity in Greensburg

This chart illustrates the average monthly humidity levels in Greensburg, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Greensburg is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%86%84%79%82%79%70%69%76%88%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Greensburg

In Greensburg in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Greensburg, you can check the information here.

Maximum UV Index Levels in Greensburg for December

The chart shows the monthly maximum UV Index (UVI) for Greensburg in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Greensburg typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910111098643
Data source: Greensburg December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How December Weather in Greensburg Compares to Other Months

Weather in Greensburg varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Greensburg, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Greensburg, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)86 mm (3.4 inches)87%moderate
February Weather2°C (36°F)116 mm (4.6 inches)85%moderate
March Weather7°C (44°F)140 mm (5.5 inches)86%high
April Weather12°C (53°F)122 mm (4.8 inches)84%very high
May Weather18°C (65°F)131 mm (5.2 inches)79%very high
June Weather23°C (73°F)128 mm (5.0 inches)82%extreme
July Weather25°C (77°F)109 mm (4.3 inches)79%very high
August Weather23°C (74°F)93 mm (3.7 inches)70%very high
September Weather21°C (70°F)83 mm (3.3 inches)69%very high
October Weather15°C (59°F)99 mm (3.9 inches)76%high
November Weather6°C (43°F)104 mm (4.1 inches)88%moderate
December Weather3°C (38°F)106 mm (4.2 inches)87%moderate

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