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December Weather in Pittsburg, United States

Last updated: June 24, 2025

In December, the average temperature in Pittsburg, United States hovers around 5°C (42°F). Prepare for the possibility of temperatures dipping as low as -15°C (6°F), with a maximum reaching up to 23°C (73°F). Be mindful of the weather; 87 mm (3.4 in) of precipitation typically falls over the course of 8 days. Additionally, expect a high average humidity of 88%.

December Temperature in Pittsburg

In December in Pittsburg, the average temperature is 5°C (42°F), with a maximum that can reach 23°C (73°F) and a minimum that can dip as low as -15°C (6°F). Be prepared for a wide range of temperatures during your travels, so pack accordingly!

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

The chart illustrates December temperature patterns in Pittsburg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Pittsburg, December typically has an average temperature of 5°C (42°F), with highs reaching up to 23°C (73°F) and lows dropping to around -15°C (6°F).
JanFebMarAprMayJunJulAugSepOctNovDec363949576977807773614642
Data source: Temperature data for Pittsburg 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 Pittsburg

In Pittsburg in December, the precipitation amount is 87 mm (3.4 in), which occurs over a span of 8 days.

December Precipitation Trends in Pittsburg

The chart displays monthly precipitation patterns in Pittsburg, 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 Pittsburg, December typically receives around 87 mm (3.4 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec961151401381311179084751139287
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Pittsburg

In Pittsburg in December humidity is 88%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less appealing and leading you to seek warmth indoors instead.

December Average Humidity in Pittsburg

This chart illustrates the average monthly humidity levels in Pittsburg, 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 Pittsburg is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%84%80%82%83%80%76%75%75%85%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Pittsburg

In Pittsburg 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 Pittsburg, you can check the information here.

Maximum UV Index Levels in Pittsburg for December

The chart shows the monthly maximum UV Index (UVI) for Pittsburg 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 Pittsburg typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710111110109753
Data source: Pittsburg 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 Pittsburg Compares to Other Months

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

This table compares monthly weather conditions in Pittsburg, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)96 mm (3.8 inches)86%moderate
February Weather4°C (39°F)115 mm (4.5 inches)84%high
March Weather10°C (49°F)140 mm (5.5 inches)84%high
April Weather14°C (57°F)138 mm (5.4 inches)80%very high
May Weather20°C (69°F)131 mm (5.2 inches)82%extreme
June Weather25°C (77°F)117 mm (4.6 inches)83%extreme
July Weather27°C (81°F)90 mm (3.5 inches)79%very high
August Weather25°C (78°F)84 mm (3.3 inches)76%very high
September Weather23°C (74°F)75 mm (3.0 inches)75%very high
October Weather16°C (61°F)113 mm (4.4 inches)74%high
November Weather8°C (46°F)92 mm (3.6 inches)85%moderate
December Weather5°C (42°F)87 mm (3.4 inches)88%moderate

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