What is the soil temperature in ZIP code 59231 today?

About 44°F on average in the top 4 inches (0–10 cm), low 40°F and high 49°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 11.2 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 59231?

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 May 24.

ZIP 59231 · Montana · Nov 11, 2026

Soil temperature for ZIP code 59231

44°Faverage today, 0–4 in deep (modelled)
low 40°F · high 49°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 11.2 km from the ZIP centre point

On a week ago

3° warmer

40°F on Nov 4

5-day mean

45°F

what the verdicts use

Held 55°F last spring

May 24

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	35.7°F	46.9°F	analysis
Nov 5	41.8°F	37.9°F	46.8°F	analysis
Nov 6	42.3°F	39.2°F	46.3°F	analysis
Nov 7	45.2°F	41.3°F	50.3°F	analysis
Nov 8	44.7°F	40.7°F	50.2°F	analysis
Nov 9	45.2°F	43.4°F	48.0°F	analysis
Nov 10	43.5°F	39.9°F	48.9°F	analysis
Today	43.9°F	40.0°F	48.8°F	analysis
Nov 12	44.0°F	40.9°F	47.7°F	forecast
Nov 13	43.4°F	40.9°F	46.2°F	forecast
Nov 14	42.2°F	40.0°F	44.7°F	forecast
Nov 15	42.4°F	38.9°F	46.7°F	forecast
Nov 16	43.6°F	40.2°F	47.9°F	forecast
Nov 17	45.5°F	43.5°F	48.7°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	Apr 6
50°F	Pre-emergent window opens	May 3
55°F	Crabgrass can germinate	May 24
60°F	Tomatoes	Jun 16
65°F	Warm-season grass seed	not reached

Nearby ZIP codes

Today's modelled average.

59248 45°F · 59244 44°F · 59273 47°F · 59230 47°F · 59241 46°F · 59250 43°F · 59240 43°F · 59260 43°F

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

Questions

What is the soil temperature in ZIP code 59231 today?: About 44°F on average in the top 4 inches (0–10 cm), low 40°F and high 49°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 11.2 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 59231?: 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 May 24.

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).