Princeton Weather Forecast
- 67
- 84
Increasing Clouds
- 70
- 82
Chance Thunderstorms
- 64
- 89
Chance Thunderstorms
- 60
- 81
Mostly Sunny
- 62
- 82
Slight Chance Rain Showers
- 67
- 85
Chance Rain Showers
Today 18 Jul Mercer
Sunny. Highs in the mid 80s. Northwest Winds around 5 Mph.
Tonight 18 Jul Mercer
Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the upper 60s. Northwest Winds around 5 Mph in the Evening, becoming light and variable.
Princeton Temperature Statistics
July Temperature
Trenton, Mercer County Airport (9.3 miles)
Lowest 5 July, 2025
59.6 °FAverage July
77.8 °FHighest 8 July, 2025
93.7 °F
Climate (2020–Present)
Trenton, Mercer County Airport (9.3 miles)
Average Low 2020–2025
46.3 °FAverage 2020–2025
55.4 °FAverage High 2020–2025
64.4 °F