What is the soil temperature in ZIP code 60921 today?

About 53°F on average in the top 4 inches (0–10 cm), low 49°F and high 57°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 4.5 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 60921?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Apr 10 and 55°F from Apr 13.

ZIP 60921 · Pontiac, IL · Nov 11, 2026

Soil temperature for ZIP code 60921

53°Faverage today, 0–4 in deep (modelled)
low 49°F · high 57°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 4.5 km from the ZIP centre point

On a week ago

10° cooler

63°F on Nov 4

5-day mean

50°F

what the verdicts use

Held 55°F last spring

Apr 13

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	62.8°F	60.2°F	65.1°F	analysis
Nov 5	55.4°F	53.4°F	57.0°F	analysis
Nov 6	50.8°F	49.8°F	53.3°F	analysis
Nov 7	45.6°F	41.5°F	48.9°F	analysis
Nov 8	47.1°F	42.0°F	52.9°F	analysis
Nov 9	50.3°F	45.2°F	55.1°F	analysis
Nov 10	53.6°F	49.8°F	57.6°F	analysis
Today	53.1°F	48.7°F	56.7°F	analysis
Nov 12	48.8°F	46.4°F	51.6°F	forecast
Nov 13	41.2°F	37.9°F	43.2°F	forecast
Nov 14	39.9°F	35.7°F	43.3°F	forecast
Nov 15	40.5°F	35.9°F	44.3°F	forecast
Nov 16	41.8°F	36.8°F	46.1°F	forecast
Nov 17	42.1°F	37.0°F	46.4°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 10
55°F	Crabgrass can germinate	Apr 13
60°F	Tomatoes	May 17
65°F	Warm-season grass seed	May 27

Kankakee, IL, 57 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

61741 53°F · 61775 53°F · 60959 53°F · 60962 53°F · 60929 53°F · 60968 53°F · 61739 53°F · 61769 52°F

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

Questions

What is the soil temperature in ZIP code 60921 today?: About 53°F on average in the top 4 inches (0–10 cm), low 49°F and high 57°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 4.5 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 60921?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Apr 10 and 55°F from Apr 13.

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).