What is the soil temperature in ZIP code 59520 today?

About 46°F on average in the top 4 inches (0–10 cm), low 42°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 6.6 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 59520?

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 15.

ZIP 59520 · Montana · Nov 11, 2026

Soil temperature for ZIP code 59520

46°Faverage today, 0–4 in deep (modelled)
low 42°F · high 53°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 6.6 km from the ZIP centre point

On a week ago

6° warmer

41°F on Nov 4

5-day mean

47°F

what the verdicts use

Held 55°F last spring

Jun 15

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	40.6°F	37.0°F	45.3°F	analysis
Nov 5	41.9°F	38.2°F	47.5°F	analysis
Nov 6	41.8°F	37.7°F	47.4°F	analysis
Nov 7	49.6°F	46.2°F	54.1°F	analysis
Nov 8	49.3°F	46.7°F	53.5°F	analysis
Nov 9	45.7°F	43.4°F	48.3°F	analysis
Nov 10	46.1°F	42.6°F	51.4°F	analysis
Today	46.4°F	41.6°F	53.2°F	analysis
Nov 12	46.8°F	43.3°F	50.9°F	forecast
Nov 13	46.3°F	43.8°F	49.5°F	forecast
Nov 14	47.0°F	43.8°F	51.4°F	forecast
Nov 15	44.4°F	40.4°F	48.5°F	forecast
Nov 16	43.6°F	40.6°F	47.7°F	forecast
Nov 17	43.9°F	41.7°F	46.9°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 15
60°F	Tomatoes	Jun 19
65°F	Warm-season grass seed	not reached

This ZIP code area covers about 1,120 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.

59521 48°F · 59446 51°F · 59535 46°F · 59532 49°F · 59489 49°F · 59525 48°F · 59501 47°F · 59528 48°F

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

Questions

What is the soil temperature in ZIP code 59520 today?: About 46°F on average in the top 4 inches (0–10 cm), low 42°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 6.6 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 59520?: 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 15.

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).