What is the soil temperature in ZIP code 57779 today?

About 49°F on average in the top 4 inches (0–10 cm), low 46°F and high 53°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 7.7 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 57779?

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 25.

ZIP 57779 · Spearfish, SD · Nov 11, 2026

Soil temperature for ZIP code 57779

49°Faverage today, 0–4 in deep (modelled)
low 46°F · high 53°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 7.7 km from the ZIP centre point

On a week ago

6° warmer

43°F on Nov 4

5-day mean

49°F

what the verdicts use

Held 55°F last spring

May 25

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	43.2°F	39.9°F	46.8°F	analysis
Nov 5	44.8°F	41.1°F	49.3°F	analysis
Nov 6	46.0°F	42.6°F	50.3°F	analysis
Nov 7	48.0°F	44.3°F	52.5°F	analysis
Nov 8	49.6°F	45.6°F	55.1°F	analysis
Nov 9	51.2°F	49.2°F	53.3°F	analysis
Nov 10	48.8°F	45.4°F	52.5°F	analysis
Today	49.1°F	46.3°F	52.8°F	analysis
Nov 12	48.3°F	45.2°F	51.7°F	forecast
Nov 13	46.6°F	43.3°F	50.4°F	forecast
Nov 14	47.7°F	44.5°F	51.8°F	forecast
Nov 15	48.0°F	44.7°F	51.7°F	forecast
Nov 16	48.2°F	45.1°F	52.1°F	forecast
Nov 17	49.0°F	45.4°F	53.2°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	Feb 28
50°F	Pre-emergent window opens	Mar 21
55°F	Crabgrass can germinate	May 25
60°F	Tomatoes	May 27
65°F	Warm-season grass seed	not reached

Rapid City, SD, 69 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

57799 49°F · 57793 50°F · 57783 49°F · 57762 50°F · 57732 46°F · 57741 50°F · 82712 49°F · 57754 43°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 57779 today?: About 49°F on average in the top 4 inches (0–10 cm), low 46°F and high 53°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 7.7 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 57779?: 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 25.

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).