What is the soil temperature in ZIP code 80434 today?

About 37°F on average in the top 4 inches (0–10 cm), low 34°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 80434?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 28 and 55°F from Jun 17.

ZIP 80434 · Colorado · Nov 11, 2026

Soil temperature for ZIP code 80434

37°Faverage today, 0–4 in deep (modelled)
low 34°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

35°F on Nov 4

5-day mean

38°F

what the verdicts use

Held 55°F last spring

Jun 17

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	34.9°F	34.5°F	35.5°F	analysis
Nov 5	35.2°F	34.1°F	37.9°F	analysis
Nov 6	38.8°F	37.2°F	42.5°F	analysis
Nov 7	37.2°F	34.7°F	39.9°F	analysis
Nov 8	37.5°F	35.0°F	41.2°F	analysis
Nov 9	38.2°F	35.5°F	43.7°F	analysis
Nov 10	38.6°F	36.2°F	41.9°F	analysis
Today	37.0°F	34.4°F	39.6°F	analysis
Nov 12	37.0°F	34.1°F	41.8°F	forecast
Nov 13	37.0°F	34.7°F	40.2°F	forecast
Nov 14	36.2°F	34.1°F	39.6°F	forecast
Nov 15	36.6°F	34.8°F	40.2°F	forecast
Nov 16	35.8°F	32.9°F	39.6°F	forecast
Nov 17	36.1°F	33.4°F	40.6°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 22
50°F	Pre-emergent window opens	May 28
55°F	Crabgrass can germinate	Jun 17
60°F	Tomatoes	not reached
65°F	Warm-season grass seed	not reached

Laramie, WY, 74 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

80480 38°F · 82063 37°F · 80430 37°F · 80545 39°F · 82325 40°F · 82070 42°F · 80473 38°F · 82055 36°F

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

Questions

What is the soil temperature in ZIP code 80434 today?: About 37°F on average in the top 4 inches (0–10 cm), low 34°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 80434?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 28 and 55°F from Jun 17.

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).