What is the soil temperature in ZIP code 59487 today?

About 48°F on average in the top 4 inches (0–10 cm), low 46°F and high 53°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 12.8 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 59487?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 2 and 55°F from Jun 6.

ZIP 59487 · Great Falls, MT · Nov 11, 2026

Soil temperature for ZIP code 59487

48°Faverage today, 0–4 in deep (modelled)
low 46°F · high 53°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 12.8 km from the ZIP centre point

On a week ago

9° warmer

40°F on Nov 4

5-day mean

47°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	39.6°F	36.2°F	44.7°F	analysis
Nov 5	40.1°F	36.2°F	45.3°F	analysis
Nov 6	41.4°F	38.2°F	45.8°F	analysis
Nov 7	47.4°F	45.2°F	51.1°F	analysis
Nov 8	46.9°F	44.2°F	50.3°F	analysis
Nov 9	45.1°F	42.7°F	47.8°F	analysis
Nov 10	45.1°F	42.0°F	49.7°F	analysis
Today	48.2°F	45.6°F	52.6°F	analysis
Nov 12	47.3°F	44.7°F	50.5°F	forecast
Nov 13	44.3°F	41.8°F	47.5°F	forecast
Nov 14	44.0°F	40.9°F	48.6°F	forecast
Nov 15	43.0°F	40.0°F	46.7°F	forecast
Nov 16	42.9°F	40.6°F	46.2°F	forecast
Nov 17	43.0°F	40.9°F	45.6°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 2
55°F	Crabgrass can germinate	Jun 6
60°F	Tomatoes	not reached
65°F	Warm-season grass seed	not reached

Great Falls, MT, 27 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

59443 48°F · 59483 48°F · 59468 47°F · 59485 49°F · 59404 49°F · 59401 50°F · 59414 50°F · 59477 47°F

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

Questions

What is the soil temperature in ZIP code 59487 today?: About 48°F on average in the top 4 inches (0–10 cm), low 46°F and high 53°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 12.8 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 59487?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 2 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).