What is the soil temperature in ZIP code 99115 today?

About 46°F on average in the top 4 inches (0–10 cm), low 44°F and high 52°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 12.5 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 99115?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Apr 7 and 55°F from Apr 30.

ZIP 99115 · Washington · Nov 11, 2026

Soil temperature for ZIP code 99115

46°Faverage today, 0–4 in deep (modelled)
low 44°F · high 52°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 12.5 km from the ZIP centre point

On a week ago

5° warmer

41°F on Nov 4

5-day mean

45°F

what the verdicts use

Held 55°F last spring

Apr 30

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	41.4°F	37.7°F	47.2°F	analysis
Nov 5	44.8°F	42.8°F	49.2°F	analysis
Nov 6	43.5°F	41.5°F	46.1°F	analysis
Nov 7	44.2°F	41.5°F	48.2°F	analysis
Nov 8	46.8°F	44.7°F	51.0°F	analysis
Nov 9	44.4°F	42.0°F	47.7°F	analysis
Nov 10	43.7°F	41.7°F	46.2°F	analysis
Today	46.5°F	43.6°F	52.3°F	analysis
Nov 12	46.5°F	44.0°F	50.6°F	forecast
Nov 13	46.4°F	43.5°F	51.6°F	forecast
Nov 14	48.8°F	46.0°F	50.8°F	forecast
Nov 15	44.2°F	43.1°F	45.6°F	forecast
Nov 16	45.5°F	44.2°F	48.7°F	forecast
Nov 17	40.2°F	37.3°F	43.8°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 3
50°F	Pre-emergent window opens	Apr 7
55°F	Crabgrass can germinate	Apr 30
60°F	Tomatoes	May 3
65°F	Warm-season grass seed	Jun 15

Moses Lake, WA, 61 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

This ZIP code area covers about 420 square miles; the reading is for the model grid cell nearest its Census centre point, which can be far from where you are. Try a neighbouring ZIP if it looks off.

Nearby ZIP codes

Today's modelled average.

99135 48°F · 98853 48°F · 98830 47°F · 98851 47°F · 98860 49°F · 99123 48°F · 99103 48°F · 98858 43°F

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

Questions

What is the soil temperature in ZIP code 99115 today?: About 46°F on average in the top 4 inches (0–10 cm), low 44°F and high 52°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 12.5 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 99115?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Apr 7 and 55°F from Apr 30.

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).