What is the soil temperature in ZIP code 98939 today?

About 50°F on average in the top 4 inches (0–10 cm), low 48°F and high 54°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 2.2 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 98939?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Mar 19 and 55°F from Apr 21.

ZIP 98939 · Union Gap, WA · Nov 11, 2026

Soil temperature for ZIP code 98939

50°Faverage today, 0–4 in deep (modelled)
low 48°F · high 54°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 2.2 km from the ZIP centre point

On a week ago

1° warmer

49°F on Nov 4

5-day mean

51°F

what the verdicts use

Held 55°F last spring

Apr 21

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	48.8°F	45.8°F	53.3°F	analysis
Nov 5	49.9°F	47.1°F	55.2°F	analysis
Nov 6	50.2°F	47.1°F	55.1°F	analysis
Nov 7	52.2°F	49.6°F	56.2°F	analysis
Nov 8	52.9°F	51.0°F	56.6°F	analysis
Nov 9	51.3°F	49.0°F	54.0°F	analysis
Nov 10	49.7°F	48.2°F	51.4°F	analysis
Today	50.1°F	47.8°F	54.3°F	analysis
Nov 12	51.0°F	48.8°F	54.7°F	forecast
Nov 13	50.3°F	48.7°F	52.8°F	forecast
Nov 14	48.7°F	46.2°F	52.4°F	forecast
Nov 15	48.3°F	47.2°F	49.4°F	forecast
Nov 16	47.3°F	45.4°F	50.9°F	forecast
Nov 17	45.9°F	43.3°F	49.8°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	Feb 2
50°F	Pre-emergent window opens	Mar 19
55°F	Crabgrass can germinate	Apr 21
60°F	Tomatoes	May 2
65°F	Warm-season grass seed	May 4

Yakima, WA, 12 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

98951 50°F · 98902 50°F · 98921 49°F · 98933 48°F · 98953 49°F · 98901 46°F · 98936 49°F · 98923 44°F

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

Questions

What is the soil temperature in ZIP code 98939 today?: About 50°F on average in the top 4 inches (0–10 cm), low 48°F and high 54°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 2.2 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 98939?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Mar 19 and 55°F from Apr 21.

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).