What is the soil temperature in ZIP code 83340 today?

About 40°F on average in the top 4 inches (0–10 cm), low 36°F and high 45°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 6.8 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 83340?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 25 and 55°F from Jun 17.

ZIP 83340 · Hailey, ID · Nov 11, 2026

Soil temperature for ZIP code 83340

40°Faverage today, 0–4 in deep (modelled)
low 36°F · high 45°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 6.8 km from the ZIP centre point

On a week ago

6° warmer

34°F on Nov 4

5-day mean

38°F

what the verdicts use

Held 55°F last spring

Jun 17

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	33.6°F	32.7°F	36.2°F	analysis
Nov 5	38.3°F	35.9°F	40.2°F	analysis
Nov 6	37.9°F	35.2°F	39.8°F	analysis
Nov 7	38.4°F	35.2°F	44.5°F	analysis
Nov 8	37.6°F	36.1°F	41.1°F	analysis
Nov 9	38.0°F	35.9°F	41.5°F	analysis
Nov 10	37.8°F	35.5°F	42.3°F	analysis
Today	39.8°F	36.4°F	45.4°F	analysis
Nov 12	40.1°F	37.0°F	44.6°F	forecast
Nov 13	38.0°F	36.1°F	40.1°F	forecast
Nov 14	37.2°F	36.6°F	37.8°F	forecast
Nov 15	34.6°F	33.2°F	37.7°F	forecast
Nov 16	32.3°F	31.9°F	33.2°F	forecast
Nov 17	32.0°F	31.9°F	32.1°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 2
50°F	Pre-emergent window opens	May 25
55°F	Crabgrass can germinate	Jun 17
60°F	Tomatoes	not reached
65°F	Warm-season grass seed	not reached

This ZIP code area covers about 558 square miles; the reading is for the model grid cell nearest its Census centre point, which can be far from where you are. Try a neighbouring ZIP if it looks off.

Nearby ZIP codes

Today's modelled average.

83353 37°F · 83354 37°F · 83327 42°F · 83333 43°F · 83227 41°F · 83716 41°F · 83313 45°F · 83322 45°F

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

Questions

What is the soil temperature in ZIP code 83340 today?: About 40°F on average in the top 4 inches (0–10 cm), low 36°F and high 45°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 6.8 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 83340?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 25 and 55°F from Jun 17.

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).