What is the soil temperature in ZIP code 54820 today?

About 45°F on average in the top 4 inches (0–10 cm), low 44°F and high 46°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 7.9 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 54820?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 26 and 55°F from May 27.

ZIP 54820 · Wisconsin · Nov 11, 2026

Soil temperature for ZIP code 54820

45°Faverage today, 0–4 in deep (modelled)
low 44°F · high 46°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 7.9 km from the ZIP centre point

On a week ago

9° cooler

54°F on Nov 4

5-day mean

44°F

what the verdicts use

Held 55°F last spring

May 27

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	54.3°F	53.4°F	56.1°F	analysis
Nov 5	46.3°F	42.0°F	51.0°F	analysis
Nov 6	39.5°F	38.4°F	41.4°F	analysis
Nov 7	39.7°F	36.2°F	44.5°F	analysis
Nov 8	44.6°F	42.7°F	46.2°F	analysis
Nov 9	43.8°F	40.7°F	47.7°F	analysis
Nov 10	45.4°F	42.4°F	47.8°F	analysis
Today	44.9°F	44.3°F	45.9°F	analysis
Nov 12	37.9°F	37.0°F	39.9°F	forecast
Nov 13	36.1°F	35.9°F	36.4°F	forecast
Nov 14	35.1°F	34.6°F	35.9°F	forecast
Nov 15	35.2°F	34.6°F	36.8°F	forecast
Nov 16	37.1°F	34.8°F	41.1°F	forecast
Nov 17	41.4°F	39.0°F	44.4°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	May 3
50°F	Pre-emergent window opens	May 26
55°F	Crabgrass can germinate	May 27
60°F	Tomatoes	Jun 5
65°F	Warm-season grass seed	not reached

Duluth, MN, 49 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

54847 45°F · 54854 44°F · 54849 44°F · 54864 44°F · 54842 44°F · 54873 46°F · 54865 44°F · 54874 44°F

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

Questions

What is the soil temperature in ZIP code 54820 today?: About 45°F on average in the top 4 inches (0–10 cm), low 44°F and high 46°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 7.9 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 54820?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 26 and 55°F from May 27.

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).