What is the soil temperature in ZIP code 59451 today?

About 50°F on average in the top 4 inches (0–10 cm), low 46°F and high 55°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 14.7 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 59451?

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 59451 · Lewistown, MT · Nov 11, 2026

Soil temperature for ZIP code 59451

50°Faverage today, 0–4 in deep (modelled)
low 46°F · high 55°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 14.7 km from the ZIP centre point

On a week ago

8° warmer

42°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	41.5°F	38.1°F	45.9°F	analysis
Nov 5	42.1°F	37.9°F	48.0°F	analysis
Nov 6	44.0°F	40.8°F	48.3°F	analysis
Nov 7	49.4°F	46.5°F	54.0°F	analysis
Nov 8	49.2°F	45.6°F	53.8°F	analysis
Nov 9	46.4°F	43.8°F	49.0°F	analysis
Nov 10	46.6°F	43.5°F	51.7°F	analysis
Today	49.7°F	46.1°F	55.0°F	analysis
Nov 12	50.8°F	47.8°F	54.1°F	forecast
Nov 13	47.4°F	44.9°F	49.6°F	forecast
Nov 14	46.4°F	42.0°F	52.6°F	forecast
Nov 15	46.6°F	43.4°F	50.0°F	forecast
Nov 16	45.7°F	43.1°F	49.1°F	forecast
Nov 17	45.1°F	42.9°F	47.8°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	Jun 18
65°F	Warm-season grass seed	not reached

Nearby ZIP codes

Today's modelled average.

59457 47°F · 59489 49°F · 59430 50°F · 59471 49°F · 59462 50°F · 59535 46°F · 59464 43°F · 59032 49°F

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

Questions

What is the soil temperature in ZIP code 59451 today?: About 50°F on average in the top 4 inches (0–10 cm), low 46°F and high 55°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 14.7 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 59451?: 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).