What is the soil temperature in ZIP code 80121 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 12.9 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 80121?

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 Mar 22.

ZIP 80121 · Greenwood Village, CO · Nov 11, 2026

Soil temperature for ZIP code 80121

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 12.9 km from the ZIP centre point

On a week ago

2° warmer

47°F on Nov 4

5-day mean

49°F

what the verdicts use

Held 55°F last spring

Mar 22

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	47.3°F	42.8°F	52.1°F	analysis
Nov 5	46.9°F	42.4°F	52.3°F	analysis
Nov 6	47.0°F	42.9°F	51.5°F	analysis
Nov 7	47.2°F	41.7°F	54.2°F	analysis
Nov 8	48.8°F	43.1°F	56.2°F	analysis
Nov 9	49.7°F	44.5°F	55.9°F	analysis
Nov 10	49.8°F	45.1°F	55.2°F	analysis
Today	49.4°F	44.9°F	54.5°F	analysis
Nov 12	49.5°F	44.3°F	56.4°F	forecast
Nov 13	49.6°F	45.6°F	53.8°F	forecast
Nov 14	46.8°F	42.6°F	51.5°F	forecast
Nov 15	45.9°F	41.3°F	50.9°F	forecast
Nov 16	46.1°F	41.1°F	52.3°F	forecast
Nov 17	46.8°F	41.8°F	53.0°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 8
50°F	Pre-emergent window opens	Mar 21
55°F	Crabgrass can germinate	Mar 22
60°F	Tomatoes	May 28
65°F	Warm-season grass seed	Jun 7

Denver, CO, 15 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

80122 49°F · 80113 57°F · 80120 49°F · 80237 57°F · 80111 49°F · 80110 57°F · 80222 57°F · 80210 57°F

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

Questions

What is the soil temperature in ZIP code 80121 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 12.9 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 80121?: 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 Mar 22.

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).