Live soil temperature · 2 inches down
Soil temperature in Louisville, KY
Right now · 40202
52.5°FCool
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
- 45.2°F
- 2 in depth
- 52.5°F
- 6 in depth
- 59.8°F
Past 14 days · 24-hour average
This week in Louisville
Over the past week, soil 2 inches down in Louisville, KY ranged from 56.2°F to 74.3°F and fell 7.3°F, averaging 67.5°F. 3 of those days sat inside the fall pre-emergent window, before soil drops below 70°F.
| Day | Surface | 2 in | 6 in |
|---|---|---|---|
| Sun | 62.9°F | 63.5°F | 64.7°F |
| Mon | 68.3°F | 67°F | 65.3°F |
| Tue | 75.2°F | 72.9°F | 69.7°F |
| Wed | 75.5°F | 74.3°F | 72.6°F |
| Thu | 74.6°F | 73.8°F | 72.5°F |
| Fri | 61.2°F | 65.1°F | 69.4°F |
| Sat | 53.1°F | 56.2°F | 60.5°F |
Daily averages from Open-Meteo for Louisville, KY 40202. 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 Louisville
- Lexington, KY70 miles from Louisville · ZIP 40502
- Cincinnati, OH91 miles from Louisville · ZIP 45201
- Evansville, IN101 miles from Louisville · ZIP 47701
- Indianapolis, IN107 miles from Louisville · ZIP 46201
- Dayton, OH131 miles from Louisville · ZIP 45401
- Nashville, TN155 miles from Louisville · ZIP 37201
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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 06:33:38 GMT