Lawrenceville, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lawrenceville, a community in Mercer County, New Jersey.
Overnight
63°F
Mostly Cloudy
Mostly cloudy, with a low around 63. North wind around 0 mph.
7-day forecast for Lawrenceville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 63°F | Mostly Cloudy | 0 mph | 0% |
| Tuesday | 85°F | Mostly Sunny | 0 mph | 0% |
| Tuesday Night | 64°F | Mostly Cloudy | 0 mph | 2% |
| Wednesday | 84°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph E | 51% |
| Wednesday Night | 71°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 to 5 mph S | 68% |
| Thursday | 89°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 5 to 10 mph SW | 29% |
| Thursday Night | 72°F | Chance Showers And Thunderstorms | 5 mph SW | 35% |
| Friday | 90°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 mph SW | 44% |
| Friday Night | 71°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 47% |
| Saturday | 88°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 38% |
| Saturday Night | 69°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 38% |
| Sunday | 88°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 15% |
| Sunday Night | 71°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph W | 15% |
| Monday | 90°F | Sunny | 0 to 10 mph W | 10% |
Forecast source: National Weather Service (api.weather.gov) for Lawrenceville (40.303, -74.739). Updated through the day.
Growing snapshot for Lawrenceville
Last spring frost
Apr 17
First fall frost
Oct 28
Growing season
192 days
Hardiness zone
7a
More local growing data for Lawrenceville: nearby ZIP 08648 weather · frost dates · planting calendar · New Jersey frost dates
Nearby towns & communities
Allentown
Groveville
Hamilton Square
Hightstown
Hopewell
Mercerville
Pennington
Princeton
Robbinsville Center
The College of New Jersey
Titusville
Trenton
Twin Rivers
White Horse
Windsor
Yardville
Climate data from the nearest NOAA station, Trenton State College, Nj (4 mi from Lawrenceville). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.