What is the soil temperature in ZIP code 99137 today?

About 47°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 14.2 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 99137?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 2 and 55°F from May 4.

ZIP 99137 · Washington · Nov 11, 2026

Soil temperature for ZIP code 99137

47°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 14.2 km from the ZIP centre point

On a week ago

7° warmer

39°F on Nov 4

5-day mean

43°F

what the verdicts use

Held 55°F last spring

May 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	39.3°F	37.2°F	42.9°F	analysis
Nov 5	39.7°F	38.6°F	40.6°F	analysis
Nov 6	39.3°F	38.8°F	40.7°F	analysis
Nov 7	41.7°F	40.0°F	45.4°F	analysis
Nov 8	43.8°F	42.9°F	45.2°F	analysis
Nov 9	41.5°F	39.8°F	43.4°F	analysis
Nov 10	43.3°F	42.8°F	44.3°F	analysis
Today	46.6°F	44.7°F	50.2°F	analysis
Nov 12	46.1°F	44.4°F	48.0°F	forecast
Nov 13	45.1°F	43.1°F	48.5°F	forecast
Nov 14	44.8°F	43.9°F	45.8°F	forecast
Nov 15	41.8°F	41.6°F	42.2°F	forecast
Nov 16	41.9°F	41.4°F	42.8°F	forecast
Nov 17	40.2°F	38.3°F	41.8°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	Apr 6
50°F	Pre-emergent window opens	May 2
55°F	Crabgrass can germinate	May 4
60°F	Tomatoes	Jun 17
65°F	Warm-season grass seed	not reached

Spokane, WA, 75 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

99129 48°F · 99131 47°F · 99138 44°F · 99173 48°F · 99101 47°F · 99181 47°F · 99040 47°F · 99167 44°F

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

Questions

What is the soil temperature in ZIP code 99137 today?: About 47°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 14.2 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 99137?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 2 and 55°F from May 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).