What is the soil temperature in ZIP code 99139 today?

About 43°F on average in the top 4 inches (0–10 cm), low 41°F and high 46°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 3.7 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 99139?

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

ZIP 99139 · Washington · Nov 11, 2026

Soil temperature for ZIP code 99139

43°Faverage today, 0–4 in deep (modelled)
low 41°F · high 46°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 3.7 km from the ZIP centre point

On a week ago

6° warmer

37°F on Nov 4

5-day mean

41°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 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	37.0°F	35.4°F	40.1°F	analysis
Nov 5	37.2°F	36.2°F	38.4°F	analysis
Nov 6	36.1°F	35.2°F	37.6°F	analysis
Nov 7	40.3°F	38.8°F	43.5°F	analysis
Nov 8	42.2°F	41.3°F	43.5°F	analysis
Nov 9	37.9°F	36.4°F	39.9°F	analysis
Nov 10	40.4°F	39.9°F	41.2°F	analysis
Today	43.0°F	41.4°F	45.9°F	analysis
Nov 12	43.5°F	42.2°F	45.6°F	forecast
Nov 13	43.3°F	41.8°F	46.0°F	forecast
Nov 14	41.6°F	40.7°F	43.5°F	forecast
Nov 15	39.2°F	38.9°F	39.5°F	forecast
Nov 16	39.3°F	39.1°F	39.6°F	forecast
Nov 17	37.3°F	36.8°F	38.1°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 30
50°F	Pre-emergent window opens	May 4
55°F	Crabgrass can germinate	Jun 17
60°F	Tomatoes	not reached
65°F	Warm-season grass seed	not reached

Nearby ZIP codes

Today's modelled average.

99152 44°F · 99153 43°F · 99119 45°F · 83848 43°F · 99114 45°F · 83821 44°F · 99157 45°F · 99180 47°F

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

Questions

What is the soil temperature in ZIP code 99139 today?: About 43°F on average in the top 4 inches (0–10 cm), low 41°F and high 46°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 3.7 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 99139?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 4 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).