What is the soil temperature in ZIP code 08609 today?

About 57°F on average in the top 4 inches (0–10 cm), low 52°F and high 60°F, from NOAA's GFS model run of Nov 11, 12:00 UTC (7 am Eastern). It is a model value for a grid cell 2.8 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 08609?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Apr 13 and 55°F from May 5.

ZIP 08609 · Trenton, NJ · Nov 11, 2026

Soil temperature for ZIP code 08609

57°Faverage today, 0–4 in deep (modelled)
low 52°F · high 60°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 2.8 km from the ZIP centre point

On a week ago

5° cooler

62°F on Nov 4

5-day mean

56°F

what the verdicts use

Held 55°F last spring

May 5

crabgrass germination temperature

What the soil says today

Pre-emergentSeason over
Cool-season seedToo late in the season
Warm-season seedToo cold
TomatoesToo cold
Peas and lettuceWarm enough

From the 5-day mean of the modelled 0–4 in layer.

Soil temperature, 0–4 in: last 7 days and next 7

°F, modelled. Dots and line: daily average (dashed = forecast); bars: low to high; green band: 50–55°F.

View as table

Day	Average	Low	High
Nov 4	61.9°F	56.4°F	66.3°F	analysis
Nov 5	63.8°F	60.6°F	68.1°F	analysis
Nov 6	64.6°F	63.3°F	65.9°F	analysis
Nov 7	58.9°F	57.1°F	60.4°F	analysis
Nov 8	54.4°F	51.5°F	57.2°F	analysis
Nov 9	55.5°F	53.0°F	58.2°F	analysis
Nov 10	54.2°F	49.6°F	58.5°F	analysis
Today	56.6°F	51.7°F	60.2°F	analysis
Nov 12	56.0°F	55.2°F	56.8°F	forecast
Nov 13	48.1°F	45.3°F	51.8°F	forecast
Nov 14	43.7°F	41.5°F	45.3°F	forecast
Nov 15	43.6°F	40.0°F	46.7°F	forecast
Nov 16	45.0°F	40.8°F	48.6°F	forecast
Nov 17	44.7°F	39.9°F	48.4°F	forecast

Source: NOAA NCEP GFS 0.25°, 0–10 cm soil temperature, run Nov 11, 12:00 UTC (7 am Eastern).

Spring 2026 threshold dates

From the 5-day mean held for 10 days or more.

Soil	What it means	Held from (spring 2026)
40°F	Peas and lettuce	Mar 8
50°F	Pre-emergent window opens	Apr 13
55°F	Crabgrass can germinate	May 5
60°F	Tomatoes	May 27
65°F	Warm-season grass seed	Jun 4

Trenton, NJ, 1 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

08629 57°F · 08608 57°F · 08638 57°F · 08610 57°F · 08619 57°F · 08611 57°F · 08618 57°F · 08648 57°F

More: crabgrass timing in New Jersey · every New Jersey city · how accurate the model is.

Questions

What is the soil temperature in ZIP code 08609 today?: About 57°F on average in the top 4 inches (0–10 cm), low 52°F and high 60°F, from NOAA's GFS model run of Nov 11, 12:00 UTC (7 am Eastern). It is a model value for a grid cell 2.8 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 08609?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Apr 13 and 55°F from May 5.

Data: Global Forecast System (GFS) 0.25°, soil temperature 0–10 cm (TSOIL) (NOAA National Centers for Environmental Prediction (NCEP)); 2025 Gazetteer ZIP Code Tabulation Areas (ZCTA) and 2024 cartographic boundary state outlines (U.S. Census Bureau).