ZIP 59648 · Montana · Nov 11, 2026

Soil temperature for ZIP code 59648

44°Faverage today, 0–4 in deep (modelled)
low 43°F · high 46°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 10.9 km from the ZIP centre point

On a week ago
8° 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.

30°40°50°60°50–55°F windowNov 4Nov 6Nov 8TodayNov 14Nov 1637°44°39°
View as table
DayAverageLowHigh
Nov 436.6°F34.8°F41.6°Fanalysis
Nov 537.8°F36.2°F39.2°Fanalysis
Nov 637.6°F36.2°F39.8°Fanalysis
Nov 743.0°F41.3°F47.2°Fanalysis
Nov 843.5°F41.4°F45.8°Fanalysis
Nov 941.0°F38.8°F44.2°Fanalysis
Nov 1041.1°F39.2°F43.9°Fanalysis
Today44.3°F43.4°F46.2°Fanalysis
Nov 1244.5°F42.5°F47.5°Fforecast
Nov 1343.2°F41.5°F45.3°Fforecast
Nov 1441.8°F40.0°F44.0°Fforecast
Nov 1538.5°F36.3°F41.6°Fforecast
Nov 1638.8°F36.6°F42.2°Fforecast
Nov 1739.0°F37.7°F40.8°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 lettuceApr 8
50°FPre-emergent window opensJun 15
55°FCrabgrass can germinateJun 17
60°FTomatoesnot reached
65°FWarm-season grass seednot reached

Helena, MT, 57 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

This ZIP code area covers about 705 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.

59633 43°F · 59640 43°F · 59421 45°F · 59477 47°F · 59639 36°F · 59602 43°F · 59636 47°F · 59483 48°F

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

Questions

What is the soil temperature in ZIP code 59648 today?
About 44°F on average in the top 4 inches (0–10 cm), low 43°F and high 46°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 10.9 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 59648?
The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Jun 15 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).