What is the soil temperature in ZIP code 80446 today?

About 36°F on average in the top 4 inches (0–10 cm), low 33°F and high 40°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 11.1 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 80446?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Jun 2 and 55°F from Jun 18.

ZIP 80446 · Colorado · Nov 11, 2026

Soil temperature for ZIP code 80446

36°Faverage today, 0–4 in deep (modelled)
low 33°F · high 40°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 11.1 km from the ZIP centre point

On a week ago

2° warmer

34°F on Nov 4

5-day mean

37°F

what the verdicts use

Held 55°F last spring

Jun 18

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 lettuceToo cold

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	33.8°F	33.0°F	34.7°F	analysis
Nov 5	34.8°F	32.7°F	39.5°F	analysis
Nov 6	35.7°F	34.3°F	38.0°F	analysis
Nov 7	36.0°F	32.7°F	39.8°F	analysis
Nov 8	37.8°F	34.8°F	42.8°F	analysis
Nov 9	38.3°F	34.6°F	44.0°F	analysis
Nov 10	38.3°F	36.4°F	40.2°F	analysis
Today	35.9°F	33.2°F	40.2°F	analysis
Nov 12	36.5°F	33.0°F	42.1°F	forecast
Nov 13	36.6°F	33.8°F	40.7°F	forecast
Nov 14	36.0°F	32.8°F	39.8°F	forecast
Nov 15	35.8°F	32.8°F	39.6°F	forecast
Nov 16	34.8°F	31.6°F	39.8°F	forecast
Nov 17	35.4°F	31.8°F	40.3°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	May 10
50°F	Pre-emergent window opens	Jun 2
55°F	Crabgrass can germinate	Jun 18
60°F	Tomatoes	not reached
65°F	Warm-season grass seed	not reached

Boulder, CO, 59 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

80451 37°F · 80478 35°F · 80447 35°F · 80442 37°F · 80510 40°F · 80481 39°F · 80468 37°F · 80482 35°F

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

Questions

What is the soil temperature in ZIP code 80446 today?: About 36°F on average in the top 4 inches (0–10 cm), low 33°F and high 40°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 11.1 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 80446?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Jun 2 and 55°F from Jun 18.

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).