Lawn Dominator

Live soil temperature · 2 inches down

Soil temperature in Nashville, TN

Right now · 37201

54.9°FCool

30°40°50°60°70°80°90°
Fall pre-emergent windowAnnual bluegrass germinates below 70°F

Annual bluegrass (Poa annua) and winter annual weeds: First fall window has passed. Most labels call for a second application 8 to 10 weeks after the first. Pre-emergent is a product that stops weed seeds before they sprout, so it only works ahead of germination.

By depth

Surface
45.1°F
2 in depth
54.9°F
6 in depth
63.9°F

Past 14 days · 24-hour average

50°60°70°80°10/410/710/1010/1310/16
Fall pre-emergent window

This week in Nashville

Over the past week, soil 2 inches down in Nashville, TN ranged from 60°F to 78.8°F and fell 5.2°F, averaging 69.8°F. 1 of those days sat inside the fall pre-emergent window, before soil drops below 70°F.

Daily average soil temperature in Nashville, TN 37201 for the past week, by depth
DaySurface2 in6 in
Sun64.1°F65.2°F66.7°F
Mon69.2°F68.1°F66.7°F
Tue74°F72°F70°F
Wed78.3°F76.3°F73.1°F
Thu80.6°F78.8°F76°F
Fri62°F68°F73.1°F
Sat55.7°F60°F64.7°F

Daily averages from Open-Meteo for Nashville, TN 37201. Readings refresh every six hours.

Interpretation

What this means for your grass.

Bermuda
Bermuda is shutting down for the year. Hold nitrogen. Annual bluegrass has been germinating since soil passed 70°F, so a pre-emergent now only stops seed that hasn't sprouted yet.
Zoysia
Zoysia is dormant or nearly so. Hold all fertilizer and PGR. Winter weeds have already germinated, so treat what is visible instead of applying a pre-emergent.
St. Augustine
St. Augustine is slowing toward winter. Hold nitrogen. Winter weeds are already up, so treat what you can see rather than applying a pre-emergent now.
Cool-season
The best growing range of the year for cool-season grass. This is prime time to fertilize and to overseed. If you are overseeding, do not apply pre-emergent: it stops grass seed the same way it stops weed seed.

Nearest readings

Soil temperature near Nashville

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Weather data from Open-Meteo. Timing guidance follows the sources on when to apply pre-emergent and how to use soil temperature.Data as of Sun, 18 Oct 2026 06:33:35 GMT