What is the soil temperature in ZIP code 59489 today?

About 49°F on average in the top 4 inches (0–10 cm), low 45°F and high 54°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 13.9 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 59489?

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 6.

ZIP 59489 · Montana · Nov 11, 2026

Soil temperature for ZIP code 59489

49°Faverage today, 0–4 in deep (modelled)
low 45°F · high 54°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 13.9 km from the ZIP centre point

On a week ago

8° warmer

40°F on Nov 4

5-day mean

48°F

what the verdicts use

Held 55°F last spring

Jun 6

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	40.5°F	37.0°F	45.1°F	analysis
Nov 5	40.9°F	37.0°F	46.8°F	analysis
Nov 6	43.6°F	40.6°F	47.7°F	analysis
Nov 7	48.9°F	46.2°F	53.2°F	analysis
Nov 8	48.3°F	44.5°F	53.1°F	analysis
Nov 9	46.2°F	43.6°F	48.9°F	analysis
Nov 10	45.9°F	42.6°F	51.0°F	analysis
Today	48.8°F	45.1°F	54.1°F	analysis
Nov 12	49.7°F	46.9°F	52.8°F	forecast
Nov 13	46.0°F	43.5°F	48.2°F	forecast
Nov 14	45.0°F	40.9°F	51.2°F	forecast
Nov 15	46.3°F	43.2°F	49.8°F	forecast
Nov 16	45.5°F	43.3°F	48.6°F	forecast
Nov 17	45.0°F	43.1°F	47.6°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 3
55°F	Crabgrass can germinate	Jun 6
60°F	Tomatoes	Jun 19
65°F	Warm-season grass seed	not reached

This ZIP code area covers about 607 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.

59451 50°F · 59535 46°F · 59471 49°F · 59430 50°F · 59457 47°F · 59527 46°F · 59546 48°F · 59520 46°F

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

Questions

What is the soil temperature in ZIP code 59489 today?: About 49°F on average in the top 4 inches (0–10 cm), low 45°F and high 54°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 13.9 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 59489?: 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 6.

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).