What is the soil temperature in ZIP code 99789 today?

About 18°F on average in the top 4 inches (0–10 cm), low 17°F and high 18°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 4.3 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 99789?

The spring window is closed. It opens again when the soil holds 50°F.

ZIP 99789 · Alaska · Nov 11, 2026

Soil temperature for ZIP code 99789

18°Faverage today, 0–4 in deep (modelled)
low 17°F · high 18°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 4.3 km from the ZIP centre point

On a week ago

4° cooler

22°F on Nov 4

5-day mean

18°F

what the verdicts use

Held 55°F last spring

–

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 lettuceToo cold

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	22.0°F	21.5°F	22.4°F	analysis
Nov 5	20.6°F	19.9°F	22.0°F	analysis
Nov 6	21.4°F	20.8°F	22.1°F	analysis
Nov 7	21.3°F	20.6°F	21.9°F	analysis
Nov 8	18.5°F	17.1°F	19.9°F	analysis
Nov 9	15.1°F	14.5°F	16.1°F	analysis
Nov 10	16.1°F	15.2°F	16.9°F	analysis
Today	17.5°F	17.3°F	17.7°F	analysis
Nov 12	17.4°F	17.4°F	17.5°F	forecast
Nov 13	17.4°F	17.4°F	17.5°F	forecast
Nov 14	17.7°F	17.6°F	17.7°F	forecast
Nov 15	17.9°F	17.7°F	18.1°F	forecast
Nov 16	18.3°F	18.1°F	18.4°F	forecast
Nov 17	18.0°F	17.9°F	18.1°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	Jun 14
50°F	Pre-emergent window opens	Jun 20
55°F	Crabgrass can germinate	not reached
60°F	Tomatoes	not reached
65°F	Warm-season grass seed	not reached

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

Questions

What is the soil temperature in ZIP code 99789 today?: About 18°F on average in the top 4 inches (0–10 cm), low 17°F and high 18°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 4.3 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 99789?: The spring window is closed. It opens again when the soil holds 50°F.

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).