What is the soil temperature in ZIP code 72421 today?

About 62°F on average in the top 4 inches (0–10 cm), low 57°F and high 68°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 3.7 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 72421?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Feb 28 and 55°F from Mar 2.

ZIP 72421 · Jonesboro, AR · Nov 11, 2026

Soil temperature for ZIP code 72421

62°Faverage today, 0–4 in deep (modelled)
low 57°F · high 68°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 3.7 km from the ZIP centre point

On a week ago

3° cooler

65°F on Nov 4

5-day mean

57°F

what the verdicts use

Held 55°F last spring

Mar 2

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	65.3°F	63.2°F	67.4°F	analysis
Nov 5	62.1°F	57.3°F	67.0°F	analysis
Nov 6	61.7°F	58.6°F	63.5°F	analysis
Nov 7	55.0°F	51.9°F	57.0°F	analysis
Nov 8	52.5°F	47.6°F	57.7°F	analysis
Nov 9	55.6°F	49.7°F	61.9°F	analysis
Nov 10	57.9°F	52.5°F	63.5°F	analysis
Today	62.0°F	57.1°F	68.2°F	analysis
Nov 12	61.0°F	58.2°F	63.4°F	forecast
Nov 13	52.5°F	49.0°F	55.5°F	forecast
Nov 14	47.8°F	43.1°F	51.5°F	forecast
Nov 15	46.9°F	43.4°F	49.9°F	forecast
Nov 16	48.3°F	43.8°F	52.8°F	forecast
Nov 17	48.9°F	44.2°F	53.4°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	Feb 9
50°F	Pre-emergent window opens	Feb 28
55°F	Crabgrass can germinate	Mar 2
60°F	Tomatoes	Apr 10
65°F	Warm-season grass seed	May 12

Jonesboro, AR, 26 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

72427 62°F · 72471 62°F · 72404 62°F · 72479 62°F · 72473 62°F · 72431 62°F · 72410 61°F · 72445 61°F

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

Questions

What is the soil temperature in ZIP code 72421 today?: About 62°F on average in the top 4 inches (0–10 cm), low 57°F and high 68°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 3.7 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 72421?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Feb 28 and 55°F from Mar 2.

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).