What is the soil temperature in ZIP code 42021 today?

About 57°F on average in the top 4 inches (0–10 cm), low 53°F and high 63°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 6.2 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 42021?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Mar 1 and 55°F from Mar 6.

ZIP 42021 · Mayfield, KY · Nov 11, 2026

Soil temperature for ZIP code 42021

57°Faverage today, 0–4 in deep (modelled)
low 53°F · high 63°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 6.2 km from the ZIP centre point

On a week ago

9° cooler

66°F on Nov 4

5-day mean

53°F

what the verdicts use

Held 55°F last spring

Mar 6

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	66.4°F	65.4°F	67.8°F	analysis
Nov 5	60.1°F	57.2°F	62.5°F	analysis
Nov 6	57.2°F	55.9°F	59.5°F	analysis
Nov 7	50.7°F	47.8°F	52.3°F	analysis
Nov 8	49.4°F	45.4°F	53.4°F	analysis
Nov 9	53.1°F	48.7°F	58.5°F	analysis
Nov 10	55.8°F	52.3°F	59.2°F	analysis
Today	57.4°F	53.2°F	62.8°F	analysis
Nov 12	56.9°F	55.7°F	60.4°F	forecast
Nov 13	48.2°F	45.8°F	51.0°F	forecast
Nov 14	44.0°F	40.6°F	46.9°F	forecast
Nov 15	44.5°F	40.9°F	48.2°F	forecast
Nov 16	45.5°F	42.0°F	49.0°F	forecast
Nov 17	45.8°F	42.2°F	49.2°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	Jan 6
50°F	Pre-emergent window opens	Mar 1
55°F	Crabgrass can germinate	Mar 6
60°F	Tomatoes	Apr 12
65°F	Warm-season grass seed	May 18

Paducah, KY, 47 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

42023 57°F · 42032 57°F · 42031 57°F · 42039 57°F · 42035 57°F · 42087 58°F · 42061 57°F · 42060 57°F

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

Questions

What is the soil temperature in ZIP code 42021 today?: About 57°F on average in the top 4 inches (0–10 cm), low 53°F and high 63°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 6.2 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 42021?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Mar 1 and 55°F from Mar 6.

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).