What is the soil temperature in ZIP code 83628 today?

About 51°F on average in the top 4 inches (0–10 cm), low 47°F and high 58°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 9.1 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 83628?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Mar 18 and 55°F from May 1.

ZIP 83628 · Caldwell, ID · Nov 11, 2026

Soil temperature for ZIP code 83628

51°Faverage today, 0–4 in deep (modelled)
low 47°F · high 58°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 9.1 km from the ZIP centre point

On a week ago

2° warmer

49°F on Nov 4

5-day mean

50°F

what the verdicts use

Held 55°F last spring

May 1

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	49.1°F	45.6°F	55.6°F	analysis
Nov 5	49.8°F	46.5°F	55.3°F	analysis
Nov 6	48.4°F	44.0°F	55.2°F	analysis
Nov 7	48.9°F	44.7°F	55.7°F	analysis
Nov 8	50.5°F	46.7°F	55.9°F	analysis
Nov 9	48.8°F	44.7°F	54.5°F	analysis
Nov 10	51.6°F	47.4°F	58.5°F	analysis
Today	51.2°F	47.0°F	57.5°F	analysis
Nov 12	49.6°F	45.4°F	55.9°F	forecast
Nov 13	49.6°F	46.2°F	55.2°F	forecast
Nov 14	51.2°F	48.3°F	53.4°F	forecast
Nov 15	48.5°F	45.1°F	54.1°F	forecast
Nov 16	49.0°F	47.2°F	51.8°F	forecast
Nov 17	45.7°F	44.7°F	47.2°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 7
50°F	Pre-emergent window opens	Mar 18
55°F	Crabgrass can germinate	May 1
60°F	Tomatoes	May 4
65°F	Warm-season grass seed	May 7

Nampa, ID, 33 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

83676 52°F · 97901 51°F · 83626 53°F · 83639 51°F · 83656 53°F · 83607 53°F · 83660 52°F · 97913 50°F

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

Questions

What is the soil temperature in ZIP code 83628 today?: About 51°F on average in the top 4 inches (0–10 cm), low 47°F and high 58°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 9.1 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 83628?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Mar 18 and 55°F from May 1.

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).