Princeton Weather in October

The climate in Princeton during October can be summarized as mild and reasonably dry.

October is in the fall / autumn in Princeton and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a cool 18°C (65°F), whilst at night 5°C (42°F) is normal.

On average October is the 5th driest month of the year in Princeton with around 66mm 2.6 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.

On the flip side this corresponds to an average of 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 Princeton in October 2025.