What is the soil temperature in ZIP code 59635 today?

About 44°F on average in the top 4 inches (0–10 cm), low 41°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 7.9 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 59635?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 24 and 55°F from Jun 17.

ZIP 59635 · Helena Valley Southeast, MT · Nov 11, 2026

Soil temperature for ZIP code 59635

44°Faverage today, 0–4 in deep (modelled)
low 41°F · high 49°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 7.9 km from the ZIP centre point

On a week ago

7° warmer

37°F on Nov 4

5-day mean

43°F

what the verdicts use

Held 55°F last spring

Jun 17

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	37.3°F	35.4°F	40.3°F	analysis
Nov 5	36.8°F	34.7°F	40.3°F	analysis
Nov 6	36.6°F	33.9°F	40.8°F	analysis
Nov 7	40.9°F	37.5°F	46.7°F	analysis
Nov 8	44.6°F	41.6°F	49.0°F	analysis
Nov 9	43.1°F	40.4°F	46.3°F	analysis
Nov 10	42.3°F	40.0°F	45.7°F	analysis
Today	43.9°F	40.6°F	49.1°F	analysis
Nov 12	44.9°F	42.5°F	47.9°F	forecast
Nov 13	42.7°F	40.2°F	45.9°F	forecast
Nov 14	42.6°F	40.6°F	45.4°F	forecast
Nov 15	39.7°F	36.8°F	43.1°F	forecast
Nov 16	39.3°F	36.8°F	42.8°F	forecast
Nov 17	39.4°F	37.2°F	42.6°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 21
50°F	Pre-emergent window opens	May 24
55°F	Crabgrass can germinate	Jun 17
60°F	Tomatoes	not reached
65°F	Warm-season grass seed	not reached

Helena, MT, 17 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

59647 44°F · 59623 47°F · 59625 47°F · 59602 43°F · 59634 47°F · 59636 47°F · 59638 43°F · 59601 43°F

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

Questions

What is the soil temperature in ZIP code 59635 today?: About 44°F on average in the top 4 inches (0–10 cm), low 41°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 7.9 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 59635?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 24 and 55°F from Jun 17.

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).