What is the soil temperature in ZIP code 60439 today?

About 52°F on average in the top 4 inches (0–10 cm), low 50°F and high 54°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 8.4 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 60439?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Apr 11 and 55°F from May 11.

ZIP 60439 · Lemont, IL · Nov 11, 2026

Soil temperature for ZIP code 60439

52°Faverage today, 0–4 in deep (modelled)
low 50°F · high 54°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 8.4 km from the ZIP centre point

On a week ago

10° cooler

62°F on Nov 4

5-day mean

50°F

what the verdicts use

Held 55°F last spring

May 11

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	62.3°F	59.1°F	64.5°F	analysis
Nov 5	54.5°F	53.6°F	56.2°F	analysis
Nov 6	49.6°F	47.1°F	51.7°F	analysis
Nov 7	46.5°F	42.5°F	49.6°F	analysis
Nov 8	48.2°F	42.9°F	53.9°F	analysis
Nov 9	51.1°F	46.5°F	54.9°F	analysis
Nov 10	53.8°F	49.2°F	57.8°F	analysis
Today	52.2°F	50.4°F	54.4°F	analysis
Nov 12	46.9°F	45.3°F	48.9°F	forecast
Nov 13	41.5°F	38.4°F	43.7°F	forecast
Nov 14	41.1°F	37.2°F	44.8°F	forecast
Nov 15	44.5°F	41.3°F	47.6°F	forecast
Nov 16	44.8°F	40.8°F	47.7°F	forecast
Nov 17	44.3°F	40.2°F	47.2°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 6
50°F	Pre-emergent window opens	Apr 11
55°F	Crabgrass can germinate	May 11
60°F	Tomatoes	May 17
65°F	Warm-season grass seed	May 26

Downers Grove, IL, 15 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

60561 52°F · 60491 50°F · 60527 52°F · 60440 52°F · 60517 52°F · 60480 52°F · 60464 54°F · 60516 52°F

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

Questions

What is the soil temperature in ZIP code 60439 today?: About 52°F on average in the top 4 inches (0–10 cm), low 50°F and high 54°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 8.4 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 60439?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Apr 11 and 55°F from May 11.

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).