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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 11°C (52°F), with extremes ranging from a chilly -4°C (26°F) to a warm 28°C (82°F). Prepare for some rainy days, as the total precipitation can reach 116 mm (4.6 in) over the course of 7 days. Don't forget your umbrella! With an average humidity of 87%, the climate can feel quite damp, so be sure to dress accordingly.

December Temperature in Pittsburg

In December in Pittsburg, the average temperature is 11°C (52°F). Maximum temperatures can reach 28°C (82°F), while minimums can drop as low as -4°C (26°F). It's advisable to pack layers to stay comfortable during your travels.

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 11°C (52°F), with highs reaching up to 28°C (82°F) and lows dropping to around -4°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec474959647380838378675651
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 116 mm (4.6 in) accumulated over a span of 7 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 116 mm (4.6 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec1061471321731609779809612070116
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 11°C (52°F), this humidity feels like a damp chill that can make your clothes cling uncomfortably, leaving you feeling slightly weighed down while exploring the area.

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.
JanFebMarAprMayJunJulAugSepOctNovDec80%79%78%78%81%78%73%66%65%72%82%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 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 Pittsburg for better planning.

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 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111110864
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 Weather8°C (47°F)106 mm (4.2 inches)80%moderate
February Weather10°C (50°F)147 mm (5.8 inches)79%high
March Weather15°C (60°F)131 mm (5.2 inches)78%very high
April Weather18°C (64°F)173 mm (6.8 inches)78%very high
May Weather23°C (74°F)160 mm (6.3 inches)81%extreme
June Weather27°C (80°F)97 mm (3.8 inches)78%extreme
July Weather29°C (84°F)79 mm (3.1 inches)73%extreme
August Weather29°C (84°F)80 mm (3.1 inches)66%extreme
September Weather26°C (79°F)96 mm (3.8 inches)65%very high
October Weather20°C (68°F)120 mm (4.7 inches)72%very high
November Weather13°C (56°F)70 mm (2.8 inches)82%high
December Weather11°C (52°F)116 mm (4.6 inches)87%moderate

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