What is the soil temperature in ZIP code 48079 today?

About 49°F on average in the top 4 inches (0–10 cm), low 45°F and high 50°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 12.7 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 48079?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 17 and 55°F from May 26.

ZIP 48079 · Saint Clair, MI · Nov 11, 2026

Soil temperature for ZIP code 48079

49°Faverage today, 0–4 in deep (modelled)
low 45°F · high 50°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 12.7 km from the ZIP centre point

On a week ago

14° cooler

62°F on Nov 4

5-day mean

48°F

what the verdicts use

Held 55°F last spring

May 26

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	62.5°F	62.2°F	63.1°F	analysis
Nov 5	58.9°F	57.3°F	61.1°F	analysis
Nov 6	51.0°F	47.9°F	55.2°F	analysis
Nov 7	45.9°F	44.2°F	47.2°F	analysis
Nov 8	45.7°F	41.1°F	50.8°F	analysis
Nov 9	48.7°F	46.1°F	49.9°F	analysis
Nov 10	49.8°F	46.2°F	53.4°F	analysis
Today	48.6°F	45.4°F	50.4°F	analysis
Nov 12	47.0°F	45.7°F	47.8°F	forecast
Nov 13	41.3°F	39.7°F	43.7°F	forecast
Nov 14	37.8°F	36.8°F	39.2°F	forecast
Nov 15	39.1°F	36.8°F	41.7°F	forecast
Nov 16	43.0°F	40.9°F	45.1°F	forecast
Nov 17	41.5°F	37.7°F	43.9°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 30
50°F	Pre-emergent window opens	May 17
55°F	Crabgrass can germinate	May 26
60°F	Tomatoes	Jun 5
65°F	Warm-season grass seed	not reached

Port Huron, MI, 16 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

48040 48°F · 48054 49°F · 48074 48°F · 48063 48°F · 48064 48°F · 48027 47°F · 48060 48°F · 48039 49°F

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

Questions

What is the soil temperature in ZIP code 48079 today?: About 49°F on average in the top 4 inches (0–10 cm), low 45°F and high 50°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 12.7 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 48079?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 17 and 55°F from May 26.

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).