What is the soil temperature in ZIP code 17921 today?

About 48°F on average in the top 4 inches (0–10 cm), low 45°F and high 50°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 9.3 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 17921?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 16 and 55°F from May 28.

ZIP 17921 · Mount Carmel, PA · Nov 11, 2026

Soil temperature for ZIP code 17921

48°Faverage today, 0–4 in deep (modelled)
low 45°F · high 50°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 9.3 km from the ZIP centre point

On a week ago

6° cooler

54°F on Nov 4

5-day mean

48°F

what the verdicts use

Held 55°F last spring

May 28

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	53.9°F	51.0°F	57.4°F	analysis
Nov 5	58.2°F	56.6°F	60.1°F	analysis
Nov 6	58.9°F	58.4°F	59.7°F	analysis
Nov 7	52.7°F	49.6°F	56.8°F	analysis
Nov 8	48.0°F	47.0°F	49.2°F	analysis
Nov 9	47.6°F	46.5°F	48.2°F	analysis
Nov 10	46.2°F	43.3°F	49.5°F	analysis
Today	47.8°F	44.9°F	49.9°F	analysis
Nov 12	47.9°F	47.3°F	49.0°F	forecast
Nov 13	42.8°F	40.7°F	45.6°F	forecast
Nov 14	38.1°F	37.3°F	38.6°F	forecast
Nov 15	37.3°F	37.1°F	37.8°F	forecast
Nov 16	37.8°F	36.4°F	39.5°F	forecast
Nov 17	37.9°F	37.6°F	38.5°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 23
50°F	Pre-emergent window opens	May 16
55°F	Crabgrass can germinate	May 28
60°F	Tomatoes	Jun 6
65°F	Warm-season grass seed	not reached

Hazleton, PA, 40 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

17936 48°F · 17943 47°F · 17945 47°F · 17840 47°F · 17920 48°F · 17888 47°F · 17851 47°F · 17935 48°F

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

Questions

What is the soil temperature in ZIP code 17921 today?: About 48°F on average in the top 4 inches (0–10 cm), low 45°F and high 50°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 9.3 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 17921?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 16 and 55°F from May 28.

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).