Princeton, NJ Weather Tomorrow

Find out what tomorrow's weather looks like in Princeton with a complete 5 day forecast featuring precipitation chances, day and night conditions, high and low temperatures in Fahrenheit and Celsius, sunrise, sunset, sky conditions, wind chill, and wind speed with direction for the Princeton area and around Mercer county, New Jersey.
Updated: Fri Oct 16th 2026 3:15 PM EDT
Princeton, NJ Weather – 10-16 – Scattered Showers
80° / 57°
Scattered Showers
Princeton is set for passing showers with temperatures peaking at 80°F and dipping to 57°F. The chance of rain is 81% with an estimated 0.25in. Wind will be moderate, blowing around 14mph on average and gusts of 29.5mph at 7 PM. High humidity with average of 82% is anticipated, the maximum being 90% at 10 PM and 63% being its lowest at 4 PM. Barometric pressure is its highest of 29.82inHg at 11 PM, a lowest point of 29.67inHg at 6 PM with an avg 29.74inHg.
Princeton, NJ Weather – 10-17 – Overcast
60° / 42°

Weather Tomorrow

Overcast
Daytime highs will reach 60°F with lows dropping to 42°F in Princeton, where skies will be overcast. Rainfall predicted to have a 61% chance with an estimated 0.08in. Wind will be moderate, blowing around 15mph on average and gusts of 26.9mph at 9 AM. The humidity will be on the higher side, averaging about 61%, the maximum being 85% at 1 AM and 37% being its lowest at 4 PM. Barometric pressure is its highest of 30.38inHg at 11 PM, a lowest point of 29.82inHg at 12 AM with an avg 30.12inHg.
Princeton, NJ Weather – 10-18 – Sunny
56° / 39°
Sunny
In Princeton, bright and sunny conditions with highs near 56°F and lows around 39°F. There's a very small chance of rainfall, only about 4%. Wind will be moderate, blowing around 13mph on average and gusts of 26mph at 3 AM. Humidity levels should be comfortable, sitting around 42% on average, the maximum being 56% at 11 PM and 27% being its lowest at 2 PM. Barometric pressure is its highest of 30.54inHg at 9 AM, a lowest point of 30.37inHg at 12 AM with an avg 30.47inHg.
Princeton, NJ Weather – 10-19 – Overcast
51° / 43°
Overcast
Skies will be overcast in Princeton, with a high of 51°F and a low of 43°F. The chance of rain is 86% with an estimated 1.22in. Wind will be moderate, blowing around 17mph on average and gusts of 38.3mph at 6 PM. The humidity will be on the higher side, averaging about 76%, the maximum being 94% at 4 PM and 58% being its lowest at 1 AM. Barometric pressure is its highest of 30.45inHg at 12 AM, a lowest point of 30.13inHg at 11 PM with an avg 30.29inHg.
Princeton, NJ Weather – 10-20 – Sunny
65° / 49°
Sunny
It will be sunny in Princeton, with a high of 65°F and a low of 49°F. Rainfall predicted to have a 58% chance with an estimated 0.19in. Wind will be moderate, blowing around 13mph on average and gusts of 33.8mph at 12 AM. Humidity levels should be comfortable, sitting around 59% on average, the maximum being 85% at 12 AM and 36% being its lowest at 2 PM. Barometric pressure is its highest of 30.26inHg at 11 PM, a lowest point of 30.11inHg at 5 AM with an avg 30.17inHg.
Princeton, NJ Weather – 10-21 – Sunny
59° / 47°
Sunny
In Princeton, bright and sunny conditions with highs near 59°F and lows around 47°F. There's a very small chance of rainfall, only about 4%. Wind will be moderate, blowing around 13mph on average and gusts of 27.1mph at 3 AM. Humidity levels should be comfortable, sitting around 60% on average, the maximum being 73% at 11 PM and 42% being its lowest at 2 PM. Barometric pressure is its highest of 30.39inHg at 11 PM, a lowest point of 30.26inHg at 12 AM with an avg 30.33inHg.

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