Current weather
Checking the latest reportMeasured conditions from the National Weather Service.
BEFORE YOU HEAD OUT
Princeton weather, air quality and conditions
Plan around Princeton’s forecast, nearby weather observations and current regional air reports.
Peak UV forecast
Checking the forecastThe EPA's daily peak forecast, with its own forecast date.
UV index guide ↗Weather alerts
Checking local alertsOfficial alerts covering the Princeton area.
View the official forecast and alerts ↗Forecast
Forecast
Loading the National Weather Service forecast…
Official NWS forecast ↗Gas prices
View the gas guide for available station reports and their report times. Confirm pump prices and any cash or membership conditions with the station.
Air quality and roads
Current air-quality and highway information from the official services.
Check air quality and road closures before heading out. For pollen levels, consult a local allergy forecast.
Sunrise and sunset
Plan around sunrise, sunset and the golden-hour windows, calculated for Princeton and shown in Eastern time.
Plan a golden hour →Conditions update throughout the day.
Rivers and streams
Latest readings from U.S. Geological Survey gauges near Princeton. Provisional data, not a flood forecast; follow National Weather Service flood warnings.
Stony Brook at Princeton NJ
1.9 miles from the city center
- Flow
- Gage height
- Water temperature
Assunpink Creek near Clarksville NJ
6.1 miles from the city center
- Flow
- Gage height
- Water temperature
Pike Run at Belle Mead NJ
7.6 miles from the city center
- Flow
- Gage height
- Water temperature
Shabakunk Creek at Sylva Lake Dam at Ewingville NJ
8.2 miles from the city center
- Flow
- Gage height
- Water temperature
Where Princeton's readings come from
- Forecast
- National Weather Service Philadelphia/Mt Holly office, forecast grid square 64,100. NWS Philadelphia/Mt Holly ↗
- Current conditions
- Trenton-Mercer Airport (KTTN). KTTN recent observations ↗
- UV index
- EPA daily UV forecast for ZIP code 08540. About the UV index ↗
- Air quality
- AirNow reporting area: Central, NJ. AirNow ↗
- Weather alerts
- Active NWS alerts for the point at Princeton's center, in Mercer County. NWS alerts ↗
- Climate normals
- NOAA 1991–2020 normals at TRENTON MERCER CO AP, NJ, 9.7 miles away: July averages a high of 86°F and January a low of 24°F, with about 45 inches of precipitation a year and 27 inches of snow. NOAA normals data ↗