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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), with a minimum of -13°C (9°F) and a maximum of 24°C (75°F). Expect 38 mm (1.5 in) of precipitation over approximately 5 days, coupled with a high average humidity of 87%.

December Temperature in Pittsburg

In December in Pittsburg, the average temperature is 5°C (42°F), with maximums reaching up to 24°C (75°F) and minimums dropping as low as -13°C (9°F). Travelers should be prepared for a wide range of temperatures, so it's advisable to pack layers for comfort during your visit.

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 24°C (75°F) and lows dropping to around -13°C (9°F).
JanFebMarAprMayJunJulAugSepOctNovDec353750576878817874604741
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 total precipitation amount is 38 mm (1.5 in) spread over a duration of 5 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 38 mm (1.5 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec6662126129199100103121901195138
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 87%. 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 enjoyable and travel less inviting as the air becomes heavy and oppressive.

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 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%78%76%78%83%83%78%68%64%70%83%87%
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.
JanFebMarAprMayJunJulAugSepOctNovDec35710101111109753
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)66 mm (2.6 inches)81%moderate
February Weather3°C (38°F)62 mm (2.4 inches)78%moderate
March Weather10°C (50°F)126 mm (5.0 inches)76%high
April Weather14°C (57°F)129 mm (5.1 inches)78%very high
May Weather20°C (68°F)199 mm (7.8 inches)83%very high
June Weather25°C (78°F)100 mm (4.0 inches)83%extreme
July Weather27°C (81°F)103 mm (4.0 inches)78%extreme
August Weather26°C (79°F)121 mm (4.8 inches)68%very high
September Weather23°C (74°F)90 mm (3.5 inches)64%very high
October Weather15°C (60°F)119 mm (4.7 inches)70%high
November Weather8°C (47°F)51 mm (2.0 inches)83%moderate
December Weather5°C (42°F)38 mm (1.5 inches)87%moderate

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