What is the soil temperature in ZIP code 37402 today?

About 57°F on average in the top 4 inches (0–10 cm), low 53°F and high 60°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 8 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 37402?

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 3.

ZIP 37402 · Chattanooga, TN · Nov 11, 2026

Soil temperature for ZIP code 37402

57°Faverage today, 0–4 in deep (modelled)
low 53°F · high 60°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 8 km from the ZIP centre point

On a week ago

8° cooler

65°F on Nov 4

5-day mean

56°F

what the verdicts use

Held 55°F last spring

Mar 3

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	65.2°F	64.9°F	65.6°F	analysis
Nov 5	65.9°F	64.5°F	67.2°F	analysis
Nov 6	62.3°F	59.7°F	63.2°F	analysis
Nov 7	56.6°F	54.4°F	58.4°F	analysis
Nov 8	54.0°F	50.4°F	57.1°F	analysis
Nov 9	54.3°F	50.1°F	58.6°F	analysis
Nov 10	56.2°F	52.1°F	60.3°F	analysis
Today	56.8°F	53.3°F	60.1°F	analysis
Nov 12	56.1°F	54.1°F	58.8°F	forecast
Nov 13	48.9°F	47.1°F	51.0°F	forecast
Nov 14	45.1°F	42.8°F	47.2°F	forecast
Nov 15	44.5°F	41.4°F	47.5°F	forecast
Nov 16	46.5°F	43.3°F	49.5°F	forecast
Nov 17	46.6°F	43.5°F	49.5°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 10
50°F	Pre-emergent window opens	Mar 1
55°F	Crabgrass can germinate	Mar 3
60°F	Tomatoes	Apr 13
65°F	Warm-season grass seed	May 19

Chattanooga, TN, 1 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

37450 57°F · 37408 57°F · 37403 57°F · 37404 57°F · 37409 57°F · 37410 57°F · 37407 57°F · 37350 57°F

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

Questions

What is the soil temperature in ZIP code 37402 today?: About 57°F on average in the top 4 inches (0–10 cm), low 53°F and high 60°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 8 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 37402?: 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 3.

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).