What is the soil temperature in ZIP code 99791 today?

About 17°F on average in the top 4 inches (0–10 cm), low 16°F and high 17°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 3.5 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 99791?

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

ZIP 99791 · Alaska · Nov 11, 2026

Soil temperature for ZIP code 99791

17°Faverage today, 0–4 in deep (modelled)
low 16°F · high 17°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 3.5 km from the ZIP centre point

On a week ago

2° cooler

19°F on Nov 4

5-day mean

17°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	18.6°F	16.5°F	20.1°F	analysis
Nov 5	20.2°F	19.3°F	20.8°F	analysis
Nov 6	20.3°F	19.1°F	20.9°F	analysis
Nov 7	19.7°F	18.8°F	20.6°F	analysis
Nov 8	17.9°F	17.1°F	18.4°F	analysis
Nov 9	16.0°F	15.4°F	16.6°F	analysis
Nov 10	15.4°F	15.0°F	15.9°F	analysis
Today	16.8°F	16.4°F	17.1°F	analysis
Nov 12	17.0°F	17.0°F	17.2°F	forecast
Nov 13	17.2°F	17.0°F	17.4°F	forecast
Nov 14	17.6°F	17.5°F	17.6°F	forecast
Nov 15	17.9°F	17.7°F	18.1°F	forecast
Nov 16	18.4°F	18.2°F	18.5°F	forecast
Nov 17	18.8°F	18.6°F	18.9°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 16
50°F	Pre-emergent window opens	Jun 19
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 99791 today?: About 17°F on average in the top 4 inches (0–10 cm), low 16°F and high 17°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 3.5 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 99791?: 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).