ZIP 59644 · Montana · Nov 11, 2026

Soil temperature for ZIP code 59644

45°Faverage today, 0–4 in deep (modelled)
low 42°F · high 49°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 10.3 km from the ZIP centre point

On a week ago
7° warmer
38°F on Nov 4
5-day mean
44°F
what the verdicts use
Held 55°F last spring
Jun 16
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.

30°40°50°60°50–55°F windowNov 4Nov 6Nov 8TodayNov 14Nov 1638°45°40°
View as table
DayAverageLowHigh
Nov 437.8°F35.4°F41.7°Fanalysis
Nov 538.1°F35.4°F42.2°Fanalysis
Nov 637.1°F34.7°F41.7°Fanalysis
Nov 741.2°F38.4°F46.3°Fanalysis
Nov 845.1°F42.3°F49.8°Fanalysis
Nov 943.9°F41.3°F46.5°Fanalysis
Nov 1044.4°F42.2°F48.1°Fanalysis
Today44.6°F42.0°F48.8°Fanalysis
Nov 1245.1°F43.4°F47.3°Fforecast
Nov 1343.2°F41.3°F46.0°Fforecast
Nov 1443.8°F41.7°F47.0°Fforecast
Nov 1542.7°F40.7°F44.6°Fforecast
Nov 1640.9°F39.0°F43.3°Fforecast
Nov 1740.5°F38.2°F43.6°Fforecast
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.

SoilWhat it meansHeld from (spring 2026)
40°FPeas and lettuceMar 21
50°FPre-emergent window opensMay 3
55°FCrabgrass can germinateJun 16
60°FTomatoesnot reached
65°FWarm-season grass seednot reached

Helena, MT, 49 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

This ZIP code area covers about 716 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.

59647 44°F · 59635 44°F · 59643 45°F · 59645 41°F · 59602 43°F · 59714 44°F · 59642 42°F · 59752 46°F

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

Questions

What is the soil temperature in ZIP code 59644 today?
About 45°F on average in the top 4 inches (0–10 cm), low 42°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 10.3 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 59644?
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 Jun 16.

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).