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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), with a minimum drop to -14°C (8°F) and an occasional peak of 24°C (75°F). Expect about 32 mm (1.2 in) of precipitation over approximately 2 days, contributing to a relatively high average humidity of 83%. Prepare for a climate that can be both chilly and damp!

December Temperature in Greensburg

In December in Greensburg, the average temperature is 3°C (38°F). Maximums can reach 24°C (75°F), while minimums can drop as low as -14°C (8°F). Be prepared for a wide range of temperatures when planning your travel activities.

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 24°C (75°F) and lows dropping to around -14°C (8°F).
JanFebMarAprMayJunJulAugSepOctNovDec333447546576807772574537
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 32 mm (1.2 in) over the course of 2 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 32 mm (1.2 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec2719695316073476249851832
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 83%. With an average temperature of 3°C (38°F), this humidity feels like a cold, damp embrace that chills you to the bone, making outdoor activities feel brisk and uncomfortable for traveling.

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 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%76%67%70%82%82%81%76%67%72%80%83%
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.
JanFebMarAprMayJunJulAugSepOctNovDec45710111111109753
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 Weather1°C (33°F)27 mm (1.1 inches)75%moderate
February Weather1°C (34°F)18 mm (0.7 inches)76%moderate
March Weather8°C (47°F)69 mm (2.7 inches)67%high
April Weather12°C (54°F)53 mm (2.1 inches)70%very high
May Weather18°C (65°F)160 mm (6.3 inches)82%extreme
June Weather25°C (77°F)73 mm (2.9 inches)82%extreme
July Weather26°C (80°F)47 mm (1.9 inches)81%extreme
August Weather25°C (77°F)62 mm (2.4 inches)76%very high
September Weather22°C (73°F)49 mm (1.9 inches)67%very high
October Weather14°C (57°F)85 mm (3.3 inches)72%high
November Weather7°C (45°F)17 mm (0.7 inches)80%moderate
December Weather3°C (38°F)32 mm (1.2 inches)83%moderate

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