What is the soil temperature in ZIP code 83321 today?

About 50°F on average in the top 4 inches (0–10 cm), low 45°F and high 57°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 13.3 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 83321?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Mar 19 and 55°F from May 4.

ZIP 83321 · Twin Falls, ID · Nov 11, 2026

Soil temperature for ZIP code 83321

50°Faverage today, 0–4 in deep (modelled)
low 45°F · high 57°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 13.3 km from the ZIP centre point

On a week ago

5° warmer

45°F on Nov 4

5-day mean

49°F

what the verdicts use

Held 55°F last spring

May 4

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	45.1°F	41.3°F	51.1°F	analysis
Nov 5	44.3°F	39.3°F	51.0°F	analysis
Nov 6	43.7°F	38.2°F	51.6°F	analysis
Nov 7	46.0°F	40.4°F	54.7°F	analysis
Nov 8	49.3°F	44.7°F	56.4°F	analysis
Nov 9	50.1°F	45.4°F	57.1°F	analysis
Nov 10	49.4°F	45.2°F	55.8°F	analysis
Today	49.7°F	45.2°F	56.9°F	analysis
Nov 12	49.6°F	45.4°F	55.2°F	forecast
Nov 13	48.3°F	45.1°F	52.5°F	forecast
Nov 14	47.8°F	45.7°F	49.6°F	forecast
Nov 15	42.7°F	39.3°F	47.9°F	forecast
Nov 16	44.7°F	41.8°F	49.3°F	forecast
Nov 17	45.5°F	42.0°F	50.8°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	Feb 27
50°F	Pre-emergent window opens	Mar 19
55°F	Crabgrass can germinate	May 4
60°F	Tomatoes	May 25
65°F	Warm-season grass seed	Jun 16

Twin Falls, ID, 40 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

83301 49°F · 83316 50°F · 83328 49°F · 83302 48°F · 83341 50°F · 83334 50°F · 83355 52°F · 89825 48°F

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

Questions

What is the soil temperature in ZIP code 83321 today?: About 50°F on average in the top 4 inches (0–10 cm), low 45°F and high 57°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 13.3 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 83321?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Mar 19 and 55°F from May 4.

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).