What is the soil temperature in ZIP code 61111 today?

About 48°F on average in the top 4 inches (0–10 cm), low 47°F and high 49°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 9.5 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 61111?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Apr 13 and 55°F from May 16.

ZIP 61111 · Machesney Park, IL · Nov 11, 2026

Soil temperature for ZIP code 61111

48°Faverage today, 0–4 in deep (modelled)
low 47°F · high 49°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 9.5 km from the ZIP centre point

On a week ago

12° cooler

59°F on Nov 4

5-day mean

46°F

what the verdicts use

Held 55°F last spring

May 16

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	59.4°F	56.3°F	61.8°F	analysis
Nov 5	51.9°F	51.0°F	53.7°F	analysis
Nov 6	46.6°F	44.5°F	49.2°F	analysis
Nov 7	42.4°F	38.8°F	45.8°F	analysis
Nov 8	45.0°F	41.1°F	50.0°F	analysis
Nov 9	46.9°F	43.1°F	50.6°F	analysis
Nov 10	49.6°F	45.8°F	53.5°F	analysis
Today	47.7°F	46.8°F	49.0°F	analysis
Nov 12	43.9°F	42.4°F	46.0°F	forecast
Nov 13	38.1°F	36.2°F	39.5°F	forecast
Nov 14	37.0°F	35.0°F	40.5°F	forecast
Nov 15	38.7°F	34.6°F	42.7°F	forecast
Nov 16	39.5°F	35.4°F	43.1°F	forecast
Nov 17	40.2°F	36.4°F	43.7°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 21
50°F	Pre-emergent window opens	Apr 13
55°F	Crabgrass can germinate	May 16
60°F	Tomatoes	May 26
65°F	Warm-season grass seed	not reached

Rockford, IL, 10 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

61114 48°F · 61115 48°F · 61107 48°F · 61103 48°F · 61108 48°F · 61073 48°F · 61112 48°F · 61011 48°F

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

Questions

What is the soil temperature in ZIP code 61111 today?: About 48°F on average in the top 4 inches (0–10 cm), low 47°F and high 49°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 9.5 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 61111?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Apr 13 and 55°F from May 16.

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).