What is the soil temperature in ZIP code 21783 today?

About 50°F on average in the top 4 inches (0–10 cm), low 48°F and high 53°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 11.8 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 21783?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Apr 14 and 55°F from May 27.

ZIP 21783 · Robinwood, MD · Nov 11, 2026

Soil temperature for ZIP code 21783

50°Faverage today, 0–4 in deep (modelled)
low 48°F · high 53°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 11.8 km from the ZIP centre point

On a week ago

5° cooler

56°F on Nov 4

5-day mean

51°F

what the verdicts use

Held 55°F last spring

May 27

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	55.7°F	53.2°F	58.8°F	analysis
Nov 5	60.0°F	58.4°F	62.1°F	analysis
Nov 6	61.4°F	60.8°F	61.6°F	analysis
Nov 7	54.9°F	52.2°F	59.1°F	analysis
Nov 8	50.5°F	48.8°F	51.9°F	analysis
Nov 9	50.1°F	48.7°F	50.8°F	analysis
Nov 10	48.9°F	46.0°F	52.1°F	analysis
Today	50.4°F	47.8°F	52.7°F	analysis
Nov 12	51.0°F	50.5°F	52.1°F	forecast
Nov 13	47.2°F	45.8°F	49.2°F	forecast
Nov 14	41.7°F	40.0°F	43.5°F	forecast
Nov 15	40.0°F	37.8°F	41.8°F	forecast
Nov 16	41.1°F	39.0°F	43.2°F	forecast
Nov 17	40.9°F	38.1°F	43.0°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 7
50°F	Pre-emergent window opens	Apr 14
55°F	Crabgrass can germinate	May 27
60°F	Tomatoes	Jun 6
65°F	Warm-season grass seed	Jun 9

Hagerstown, MD, 14 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

21780 50°F · 21719 50°F · 21742 50°F · 17250 50°F · 21773 51°F · 17214 50°F · 21788 51°F · 17268 50°F

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

Questions

What is the soil temperature in ZIP code 21783 today?: About 50°F on average in the top 4 inches (0–10 cm), low 48°F and high 53°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 11.8 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 21783?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Apr 14 and 55°F from May 27.

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).