What is the soil temperature in ZIP code 99639 today?

About 32°F on average in the top 4 inches (0–10 cm), low 32°F and high 32°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 1.7 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 99639?

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

ZIP 99639 · Homer, AK · Nov 11, 2026

Soil temperature for ZIP code 99639

32°Faverage today, 0–4 in deep (modelled)
low 32°F · high 32°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 1.7 km from the ZIP centre point

On a week ago

5° cooler

37°F on Nov 4

5-day mean

32°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	36.9°F	35.2°F	39.7°F	analysis
Nov 5	35.8°F	34.7°F	37.3°F	analysis
Nov 6	34.8°F	34.3°F	35.0°F	analysis
Nov 7	33.2°F	32.5°F	33.9°F	analysis
Nov 8	31.8°F	31.2°F	32.3°F	analysis
Nov 9	31.0°F	30.9°F	31.2°F	analysis
Nov 10	30.9°F	30.9°F	31.2°F	analysis
Today	31.7°F	31.5°F	32.0°F	analysis
Nov 12	32.4°F	32.3°F	32.5°F	forecast
Nov 13	32.2°F	32.0°F	32.3°F	forecast
Nov 14	31.9°F	31.7°F	32.1°F	forecast
Nov 15	31.3°F	31.2°F	31.4°F	forecast
Nov 16	31.3°F	31.2°F	31.3°F	forecast
Nov 17	31.3°F	31.2°F	31.3°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	May 15
50°F	Pre-emergent window opens	Jun 4
55°F	Crabgrass can germinate	not reached
60°F	Tomatoes	not reached
65°F	Warm-season grass seed	not reached

Nearby ZIP codes

Today's modelled average.

99556 31°F · 99610 33°F · 99669 32°F · 99603 32°F · 99663 33°F

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

Questions

What is the soil temperature in ZIP code 99639 today?: About 32°F on average in the top 4 inches (0–10 cm), low 32°F and high 32°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 1.7 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 99639?: 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).