What is the soil temperature in ZIP code 59721 today?

About 46°F on average in the top 4 inches (0–10 cm), low 42°F and high 51°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 14.3 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 59721?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 3 and 55°F from Jun 16.

ZIP 59721 · Montana · Nov 11, 2026

Soil temperature for ZIP code 59721

46°Faverage today, 0–4 in deep (modelled)
low 42°F · high 51°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 14.3 km from the ZIP centre point

On a week ago

7° warmer

38°F on Nov 4

5-day mean

45°F

what the verdicts use

Held 55°F last spring

Jun 16

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	38.5°F	35.9°F	43.4°F	analysis
Nov 5	38.4°F	35.5°F	43.3°F	analysis
Nov 6	39.1°F	35.7°F	44.9°F	analysis
Nov 7	42.7°F	38.8°F	48.9°F	analysis
Nov 8	45.1°F	41.4°F	50.5°F	analysis
Nov 9	44.6°F	41.8°F	48.1°F	analysis
Nov 10	44.7°F	42.0°F	48.9°F	analysis
Today	45.5°F	42.2°F	50.8°F	analysis
Nov 12	45.0°F	42.2°F	48.4°F	forecast
Nov 13	42.4°F	39.0°F	47.2°F	forecast
Nov 14	44.0°F	41.3°F	47.8°F	forecast
Nov 15	43.4°F	40.7°F	46.1°F	forecast
Nov 16	40.6°F	37.9°F	44.3°F	forecast
Nov 17	42.2°F	40.2°F	45.2°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	Mar 18
50°F	Pre-emergent window opens	May 3
55°F	Crabgrass can germinate	Jun 16
60°F	Tomatoes	not reached
65°F	Warm-season grass seed	not reached

Butte, MT, 55 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

59747 47°F · 59735 46°F · 59759 45°F · 59760 46°F · 59752 46°F · 59745 45°F · 59632 43°F · 59751 45°F

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

Questions

What is the soil temperature in ZIP code 59721 today?: About 46°F on average in the top 4 inches (0–10 cm), low 42°F and high 51°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 14.3 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 59721?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 3 and 55°F from Jun 16.

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).