What is the soil temperature in ZIP code 61721 today?

About 54°F on average in the top 4 inches (0–10 cm), low 50°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 12.8 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 61721?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Mar 22 and 55°F from Apr 12.

ZIP 61721 · Lincoln, IL · Nov 11, 2026

Soil temperature for ZIP code 61721

54°Faverage today, 0–4 in deep (modelled)
low 50°F · high 57°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 12.8 km from the ZIP centre point

On a week ago

7° cooler

62°F on Nov 4

5-day mean

51°F

what the verdicts use

Held 55°F last spring

Apr 12

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	61.7°F	58.6°F	64.7°F	analysis
Nov 5	55.0°F	52.7°F	56.6°F	analysis
Nov 6	52.2°F	51.2°F	54.1°F	analysis
Nov 7	45.8°F	41.7°F	49.0°F	analysis
Nov 8	47.1°F	41.6°F	53.6°F	analysis
Nov 9	50.8°F	45.6°F	56.1°F	analysis
Nov 10	54.9°F	50.8°F	59.1°F	analysis
Today	54.3°F	50.4°F	56.8°F	analysis
Nov 12	48.6°F	47.0°F	51.0°F	forecast
Nov 13	41.2°F	37.9°F	43.1°F	forecast
Nov 14	39.8°F	35.4°F	43.8°F	forecast
Nov 15	41.3°F	36.2°F	46.2°F	forecast
Nov 16	42.8°F	38.1°F	47.1°F	forecast
Nov 17	42.9°F	38.1°F	47.1°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 4
50°F	Pre-emergent window opens	Mar 22
55°F	Crabgrass can germinate	Apr 12
60°F	Tomatoes	May 16
65°F	Warm-season grass seed	May 26

Bloomington, IL, 32 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

61759 53°F · 61723 54°F · 61747 53°F · 62635 54°F · 61754 54°F · 61774 53°F · 61751 54°F · 62643 54°F

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

Questions

What is the soil temperature in ZIP code 61721 today?: About 54°F on average in the top 4 inches (0–10 cm), low 50°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 12.8 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 61721?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Mar 22 and 55°F from Apr 12.

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).