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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 13°C (55°F), with a minimum dropping to -4°C (25°F) and a peak reaching 28°C (82°F). Precipitation is notable, averaging 131 mm (5.2 in) over approximately 12 days, while the atmosphere remains quite humid with an average of 88%. Prepare accordingly for a mix of cool and warm days!

December Temperature in Greensburg

In December in Greensburg, the average temperature is 13°C (55°F). Maximums can reach 28°C (82°F), while minimums can dip as low as -4°C (25°F). Be prepared for a wide range of temperatures when planning your travel to Greensburg during this month.

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 13°C (55°F), with highs reaching up to 28°C (82°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec525763677579818178715955
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 131 mm (5.2 in) spread over 12 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 131 mm (5.2 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec1231279615616417317818713011985131
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 88%. With an average temperature of 13°C (55°F), this humidity feels like a damp chill that clings to your skin, making it essential to dress in layers while exploring, as the moisture in the air can lead to a rather uncomfortable experience 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 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%83%80%81%81%78%79%79%79%77%85%88%
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 reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Greensburg for better planning.

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 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589111112121110864
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 Weather11°C (52°F)123 mm (4.8 inches)83%moderate
February Weather14°C (58°F)127 mm (5.0 inches)83%very high
March Weather17°C (64°F)96 mm (3.8 inches)80%very high
April Weather19°C (67°F)156 mm (6.1 inches)81%extreme
May Weather24°C (75°F)164 mm (6.5 inches)81%extreme
June Weather26°C (80°F)173 mm (6.8 inches)78%extreme
July Weather27°C (81°F)178 mm (7.0 inches)79%extreme
August Weather27°C (81°F)187 mm (7.4 inches)79%extreme
September Weather26°C (79°F)130 mm (5.1 inches)79%very high
October Weather22°C (71°F)119 mm (4.7 inches)77%very high
November Weather15°C (59°F)85 mm (3.4 inches)85%high
December Weather13°C (55°F)131 mm (5.2 inches)88%moderate

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