What is the soil temperature in ZIP code 15421 today?

About 49°F on average in the top 4 inches (0–10 cm), low 46°F and high 51°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 13.5 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 15421?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Apr 13 and 55°F from May 19.

ZIP 15421 · Uniontown, PA · Nov 11, 2026

Soil temperature for ZIP code 15421

49°Faverage today, 0–4 in deep (modelled)
low 46°F · high 51°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 13.5 km from the ZIP centre point

On a week ago

9° cooler

58°F on Nov 4

5-day mean

46°F

what the verdicts use

Held 55°F last spring

May 19

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	57.7°F	54.8°F	60.4°F	analysis
Nov 5	59.8°F	59.5°F	60.2°F	analysis
Nov 6	55.3°F	53.8°F	57.5°F	analysis
Nov 7	46.3°F	44.2°F	49.9°F	analysis
Nov 8	43.3°F	41.3°F	45.8°F	analysis
Nov 9	45.5°F	44.0°F	46.8°F	analysis
Nov 10	45.4°F	42.6°F	48.5°F	analysis
Today	48.7°F	46.5°F	51.3°F	analysis
Nov 12	47.9°F	46.5°F	49.0°F	forecast
Nov 13	42.1°F	40.0°F	44.7°F	forecast
Nov 14	37.6°F	36.9°F	38.8°F	forecast
Nov 15	36.0°F	35.9°F	36.2°F	forecast
Nov 16	36.7°F	35.7°F	38.4°F	forecast
Nov 17	38.0°F	37.2°F	39.8°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	Mar 5
50°F	Pre-emergent window opens	Apr 13
55°F	Crabgrass can germinate	May 19
60°F	Tomatoes	Jun 7
65°F	Warm-season grass seed	not reached

Morgantown, WV, 39 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

15437 49°F · 15470 49°F · 15445 50°F · 15431 49°F · 15456 50°F · 15416 51°F · 15465 50°F · 15436 51°F

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

Questions

What is the soil temperature in ZIP code 15421 today?: About 49°F on average in the top 4 inches (0–10 cm), low 46°F and high 51°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 13.5 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 15421?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Apr 13 and 55°F from May 19.

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).