What is the soil temperature in ZIP code 18340 today?

About 47°F on average in the top 4 inches (0–10 cm), low 45°F and high 48°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 9.2 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 18340?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 17 and 55°F from Jun 4.

ZIP 18340 · Pennsylvania · Nov 11, 2026

Soil temperature for ZIP code 18340

47°Faverage today, 0–4 in deep (modelled)
low 45°F · high 48°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 9.2 km from the ZIP centre point

On a week ago

6° cooler

53°F on Nov 4

5-day mean

48°F

what the verdicts use

Held 55°F last spring

Jun 4

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	53.2°F	50.1°F	56.7°F	analysis
Nov 5	55.7°F	54.1°F	57.7°F	analysis
Nov 6	57.9°F	57.5°F	58.4°F	analysis
Nov 7	52.6°F	49.8°F	55.0°F	analysis
Nov 8	48.1°F	47.2°F	48.8°F	analysis
Nov 9	46.7°F	46.3°F	47.2°F	analysis
Nov 10	45.4°F	42.6°F	48.2°F	analysis
Today	46.9°F	44.7°F	48.1°F	analysis
Nov 12	46.4°F	46.0°F	47.2°F	forecast
Nov 13	42.2°F	40.2°F	44.4°F	forecast
Nov 14	38.0°F	37.0°F	38.4°F	forecast
Nov 15	37.6°F	36.4°F	38.7°F	forecast
Nov 16	38.7°F	37.0°F	39.7°F	forecast
Nov 17	38.1°F	37.8°F	38.4°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	Apr 11
50°F	Pre-emergent window opens	May 17
55°F	Crabgrass can germinate	Jun 4
60°F	Tomatoes	Jun 7
65°F	Warm-season grass seed	not reached

Kiryas Joel, NY, 51 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

12780 47°F · 18336 49°F · 12770 47°F · 12737 47°F · 12746 47°F · 12771 47°F · 12719 47°F · 18458 47°F

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

Questions

What is the soil temperature in ZIP code 18340 today?: About 47°F on average in the top 4 inches (0–10 cm), low 45°F and high 48°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 9.2 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 18340?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 17 and 55°F from Jun 4.

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).