What is the soil temperature in ZIP code 83443 today?

About 42°F on average in the top 4 inches (0–10 cm), low 38°F and high 48°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 5 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 83443?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 5 and 55°F from Jun 18.

ZIP 83443 · Ammon, ID · Nov 11, 2026

Soil temperature for ZIP code 83443

42°Faverage today, 0–4 in deep (modelled)
low 38°F · high 48°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 5 km from the ZIP centre point

On a week ago

2° warmer

39°F on Nov 4

5-day mean

41°F

what the verdicts use

Held 55°F last spring

Jun 18

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	39.4°F	36.4°F	43.8°F	analysis
Nov 5	38.4°F	36.2°F	41.8°F	analysis
Nov 6	38.1°F	35.9°F	41.8°F	analysis
Nov 7	38.3°F	35.9°F	44.0°F	analysis
Nov 8	40.2°F	36.4°F	45.9°F	analysis
Nov 9	41.9°F	38.6°F	46.5°F	analysis
Nov 10	41.5°F	38.8°F	45.3°F	analysis
Today	41.7°F	37.8°F	47.8°F	analysis
Nov 12	42.1°F	38.0°F	47.9°F	forecast
Nov 13	42.2°F	39.3°F	45.8°F	forecast
Nov 14	40.0°F	39.2°F	41.7°F	forecast
Nov 15	35.8°F	33.9°F	38.4°F	forecast
Nov 16	36.6°F	33.9°F	41.6°F	forecast
Nov 17	38.0°F	34.7°F	42.8°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	Mar 19
50°F	Pre-emergent window opens	May 5
55°F	Crabgrass can germinate	Jun 18
60°F	Tomatoes	not reached
65°F	Warm-season grass seed	not reached

Rexburg, ID, 38 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

83449 41°F · 83427 41°F · 83442 44°F · 83422 41°F · 83401 45°F · 83452 41°F · 83406 45°F · 83454 45°F

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

Questions

What is the soil temperature in ZIP code 83443 today?: About 42°F on average in the top 4 inches (0–10 cm), low 38°F and high 48°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 5 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 83443?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 5 and 55°F from Jun 18.

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).