What is the soil temperature in ZIP code 85121 today?

About 71°F on average in the top 4 inches (0–10 cm), low 65°F and high 78°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 14.9 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 85121?

Soil here stayed above 50°F all last winter, so the 50 to 55°F soil rule gives no spring window. Time pre-emergent to your local calendar.

ZIP 85121 · Sun Lakes, AZ · Nov 11, 2026

Soil temperature for ZIP code 85121

71°Faverage today, 0–4 in deep (modelled)
low 65°F · high 78°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 14.9 km from the ZIP centre point

On a week ago

2° warmer

69°F on Nov 4

5-day mean

71°F

what the verdicts use

Held 55°F last spring

Jan 14

crabgrass germination temperature

What the soil says today

Pre-emergentSeason over
Cool-season seedToo late in the season
Warm-season seedWarm enough
TomatoesSoil warm enough
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	69.0°F	63.4°F	76.4°F	analysis
Nov 5	68.9°F	63.4°F	76.3°F	analysis
Nov 6	69.9°F	64.4°F	77.9°F	analysis
Nov 7	70.3°F	65.2°F	77.5°F	analysis
Nov 8	71.0°F	65.6°F	78.2°F	analysis
Nov 9	70.5°F	64.7°F	78.3°F	analysis
Nov 10	71.2°F	65.2°F	79.6°F	analysis
Today	70.9°F	65.4°F	78.3°F	analysis
Nov 12	70.8°F	65.1°F	78.4°F	forecast
Nov 13	70.6°F	66.7°F	74.9°F	forecast
Nov 14	68.8°F	64.9°F	73.1°F	forecast
Nov 15	70.3°F	66.3°F	76.9°F	forecast
Nov 16	69.8°F	64.5°F	76.6°F	forecast
Nov 17	69.7°F	65.1°F	75.2°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	never below
50°F	Pre-emergent window opens	never below
55°F	Crabgrass can germinate	Jan 14
60°F	Tomatoes	Feb 1
65°F	Warm-season grass seed	Feb 6

Maricopa, AZ, 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.

85248 71°F · 85249 71°F · 85138 70°F · 85226 71°F · 85286 71°F · 85147 69°F · 85298 71°F · 85224 71°F

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

Questions

What is the soil temperature in ZIP code 85121 today?: About 71°F on average in the top 4 inches (0–10 cm), low 65°F and high 78°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 14.9 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 85121?: Soil here stayed above 50°F all last winter, so the 50 to 55°F soil rule gives no spring window. Time pre-emergent to your local calendar.

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).