What is the soil temperature in ZIP code 37686 today?

About 51°F on average in the top 4 inches (0–10 cm), low 48°F and high 55°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 11.1 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 37686?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Mar 6 and 55°F from May 17.

ZIP 37686 · Johnson City, TN · Nov 11, 2026

Soil temperature for ZIP code 37686

51°Faverage today, 0–4 in deep (modelled)
low 48°F · high 55°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 11.1 km from the ZIP centre point

On a week ago

9° cooler

60°F on Nov 4

5-day mean

52°F

what the verdicts use

Held 55°F last spring

May 17

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	60.0°F	58.6°F	61.0°F	analysis
Nov 5	61.5°F	60.8°F	62.6°F	analysis
Nov 6	61.2°F	59.7°F	62.3°F	analysis
Nov 7	56.6°F	55.5°F	58.8°F	analysis
Nov 8	51.2°F	48.1°F	53.2°F	analysis
Nov 9	49.5°F	46.1°F	52.5°F	analysis
Nov 10	50.1°F	46.3°F	53.7°F	analysis
Today	51.4°F	47.8°F	54.8°F	analysis
Nov 12	51.8°F	50.2°F	52.8°F	forecast
Nov 13	44.9°F	43.2°F	47.8°F	forecast
Nov 14	39.3°F	37.5°F	40.4°F	forecast
Nov 15	38.9°F	35.7°F	42.0°F	forecast
Nov 16	41.1°F	37.2°F	45.0°F	forecast
Nov 17	42.2°F	38.4°F	45.8°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 1
50°F	Pre-emergent window opens	Mar 6
55°F	Crabgrass can germinate	May 17
60°F	Tomatoes	May 20
65°F	Warm-season grass seed	Jun 10

Johnson City, TN, 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.

37694 51°F · 37617 51°F · 37615 52°F · 37601 54°F · 37618 51°F · 37663 52°F · 37614 54°F · 37604 53°F

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

Questions

What is the soil temperature in ZIP code 37686 today?: About 51°F on average in the top 4 inches (0–10 cm), low 48°F and high 55°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 11.1 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 37686?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Mar 6 and 55°F from May 17.

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).