What is the soil temperature in ZIP code 06351 today?

About 50°F on average in the top 4 inches (0–10 cm), low 48°F and high 51°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 10.9 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 06351?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 6 and 55°F from May 18.

ZIP 06351 · Plainfield, CT · Nov 11, 2026

Soil temperature for ZIP code 06351

50°Faverage today, 0–4 in deep (modelled)
low 48°F · high 51°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 10.9 km from the ZIP centre point

On a week ago

7° cooler

57°F on Nov 4

5-day mean

52°F

what the verdicts use

Held 55°F last spring

May 18

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	57.2°F	54.2°F	59.9°F	analysis
Nov 5	60.8°F	58.9°F	63.0°F	analysis
Nov 6	62.3°F	61.9°F	62.7°F	analysis
Nov 7	59.6°F	58.1°F	61.3°F	analysis
Nov 8	52.3°F	51.3°F	53.5°F	analysis
Nov 9	49.4°F	47.8°F	50.2°F	analysis
Nov 10	48.4°F	45.8°F	50.1°F	analysis
Today	49.8°F	47.6°F	51.3°F	analysis
Nov 12	49.3°F	47.4°F	50.3°F	forecast
Nov 13	46.1°F	43.5°F	48.5°F	forecast
Nov 14	42.0°F	41.7°F	42.6°F	forecast
Nov 15	40.5°F	38.0°F	42.5°F	forecast
Nov 16	40.9°F	38.2°F	43.1°F	forecast
Nov 17	41.4°F	38.1°F	43.7°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 26
50°F	Pre-emergent window opens	May 6
55°F	Crabgrass can germinate	May 18
60°F	Tomatoes	Jun 6
65°F	Warm-season grass seed	Jun 12

Norwich, CT, 13 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

06380 50°F · 06365 50°F · 06384 49°F · 06374 49°F · 06330 49°F · 06350 49°F · 06360 50°F · 06331 49°F

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

Questions

What is the soil temperature in ZIP code 06351 today?: About 50°F on average in the top 4 inches (0–10 cm), low 48°F and high 51°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 10.9 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 06351?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 6 and 55°F from May 18.

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).