What is the soil temperature in ZIP code 80310 today?

About 50°F on average in the top 4 inches (0–10 cm), low 46°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 1.1 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 80310?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Mar 20 and 55°F from Mar 21.

ZIP 80310 · Boulder, CO · Nov 11, 2026

Soil temperature for ZIP code 80310

50°Faverage today, 0–4 in deep (modelled)
low 46°F · high 54°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 1.1 km from the ZIP centre point

On a week ago

5° warmer

45°F on Nov 4

5-day mean

49°F

what the verdicts use

Held 55°F last spring

Mar 21

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	45.2°F	41.5°F	49.5°F	analysis
Nov 5	45.9°F	41.7°F	50.9°F	analysis
Nov 6	45.5°F	41.7°F	50.2°F	analysis
Nov 7	46.6°F	42.2°F	52.1°F	analysis
Nov 8	48.4°F	44.2°F	53.4°F	analysis
Nov 9	50.4°F	46.3°F	56.0°F	analysis
Nov 10	50.2°F	45.6°F	55.0°F	analysis
Today	50.0°F	46.5°F	53.5°F	analysis
Nov 12	49.6°F	45.4°F	54.6°F	forecast
Nov 13	49.0°F	46.0°F	52.1°F	forecast
Nov 14	46.2°F	42.9°F	49.2°F	forecast
Nov 15	45.2°F	41.4°F	49.3°F	forecast
Nov 16	44.1°F	40.0°F	48.5°F	forecast
Nov 17	44.5°F	40.2°F	49.8°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 6
50°F	Pre-emergent window opens	Mar 20
55°F	Crabgrass can germinate	Mar 21
60°F	Tomatoes	May 27
65°F	Warm-season grass seed	Jun 6

Boulder, CO, 1 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

80305 50°F · 80304 50°F · 80303 50°F · 80301 50°F · 80302 50°F · 80025 50°F · 80027 50°F · 80544 50°F

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

Questions

What is the soil temperature in ZIP code 80310 today?: About 50°F on average in the top 4 inches (0–10 cm), low 46°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 1.1 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 80310?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Mar 20 and 55°F from Mar 21.

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).