What is the soil temperature in ZIP code 57717 today?

About 49°F on average in the top 4 inches (0–10 cm), low 45°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 11 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 57717?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Mar 21 and 55°F from May 24.

ZIP 57717 · Belle Fourche, SD · Nov 11, 2026

Soil temperature for ZIP code 57717

49°Faverage today, 0–4 in deep (modelled)
low 45°F · high 54°F

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

On a week ago

5° warmer

43°F on Nov 4

5-day mean

48°F

what the verdicts use

Held 55°F last spring

May 24

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	43.3°F	39.3°F	47.9°F	analysis
Nov 5	44.3°F	40.2°F	49.1°F	analysis
Nov 6	45.3°F	40.8°F	51.3°F	analysis
Nov 7	47.2°F	43.1°F	52.5°F	analysis
Nov 8	47.9°F	43.2°F	54.3°F	analysis
Nov 9	49.8°F	47.0°F	52.9°F	analysis
Nov 10	48.3°F	44.2°F	53.0°F	analysis
Today	48.6°F	44.9°F	53.6°F	analysis
Nov 12	47.5°F	44.0°F	51.3°F	forecast
Nov 13	44.5°F	41.3°F	48.1°F	forecast
Nov 14	45.6°F	41.8°F	50.5°F	forecast
Nov 15	46.5°F	41.4°F	52.6°F	forecast
Nov 16	47.5°F	43.5°F	52.0°F	forecast
Nov 17	47.8°F	43.8°F	52.3°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 3
50°F	Pre-emergent window opens	Mar 21
55°F	Crabgrass can germinate	May 24
60°F	Tomatoes	May 26
65°F	Warm-season grass seed	not reached

This ZIP code area covers about 1,364 square miles; the reading is for the model grid cell nearest its Census centre point, which can be far from where you are. Try a neighbouring ZIP if it looks off.

Nearby ZIP codes

Today's modelled average.

57762 50°F · 57779 49°F · 82710 48°F · 57760 50°F · 57776 49°F · 57799 49°F · 82712 49°F · 57793 50°F

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

Questions

What is the soil temperature in ZIP code 57717 today?: About 49°F on average in the top 4 inches (0–10 cm), low 45°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 11 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 57717?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Mar 21 and 55°F from May 24.

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).