What is the soil temperature in ZIP code 06021 today?

About 47°F on average in the top 4 inches (0–10 cm), low 46°F and high 48°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 5.3 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 06021?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 17 and 55°F from Jun 5.

ZIP 06021 · Winsted, CT · Nov 11, 2026

Soil temperature for ZIP code 06021

47°Faverage today, 0–4 in deep (modelled)
low 46°F · high 48°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 5.3 km from the ZIP centre point

On a week ago

8° cooler

56°F on Nov 4

5-day mean

49°F

what the verdicts use

Held 55°F last spring

Jun 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	55.5°F	52.7°F	58.6°F	analysis
Nov 5	57.0°F	55.0°F	59.2°F	analysis
Nov 6	60.0°F	59.5°F	60.8°F	analysis
Nov 7	55.6°F	52.8°F	58.0°F	analysis
Nov 8	48.5°F	47.9°F	49.4°F	analysis
Nov 9	45.6°F	44.3°F	46.4°F	analysis
Nov 10	45.8°F	44.0°F	47.8°F	analysis
Today	47.3°F	45.8°F	48.1°F	analysis
Nov 12	45.2°F	43.9°F	46.7°F	forecast
Nov 13	40.9°F	39.8°F	42.8°F	forecast
Nov 14	38.3°F	37.5°F	39.0°F	forecast
Nov 15	37.2°F	36.9°F	37.8°F	forecast
Nov 16	37.8°F	35.9°F	39.4°F	forecast
Nov 17	38.0°F	37.6°F	38.2°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	Apr 12
50°F	Pre-emergent window opens	May 17
55°F	Crabgrass can germinate	Jun 5
60°F	Tomatoes	Jun 7
65°F	Warm-season grass seed	not reached

West Torrington, CT, 22 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

06065 47°F · 06091 47°F · 06098 47°F · 06058 46°F · 06063 47°F · 01255 46°F · 06027 47°F · 01034 47°F

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

Questions

What is the soil temperature in ZIP code 06021 today?: About 47°F on average in the top 4 inches (0–10 cm), low 46°F and high 48°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 5.3 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 06021?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 17 and 55°F from Jun 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).