Pittsburg Weather in December

The climate in Pittsburg during December can be summarized as cool and a little damp.

December is in the winter in Pittsburg and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a cool 14°C (57°F), whilst at night 1°C (34°F) is normal.

On average December is the 6th wettest month of the year in Pittsburg with around 98mm 3.9 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.

On the flip side this corresponds to an average of 5.7 hours of sunshine per day.

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Pittsburg in December 2025.