Live soil temperature · 2 inches down
Soil temperature in Wilmington, DE
Right now · 19801
64.5°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
- 64.4°F
- 2 in depth
- 64.5°F
- 6 in depth
- 64°F
Past 14 days · 24-hour average
This week in Wilmington
Over the past week, soil 2 inches down in Wilmington, DE ranged from 58°F to 64°F and held steady, averaging 61.7°F.
| Day | Surface | 2 in | 6 in |
|---|---|---|---|
| Mon | 64°F | 63.7°F | 64.3°F |
| Tue | 59.1°F | 58.9°F | 62.1°F |
| Wed | 59.7°F | 58°F | 59.8°F |
| Thu | 65.1°F | 64°F | 63.1°F |
| Fri | 63°F | 62.5°F | 63.6°F |
| Sat | 62.8°F | 62°F | 62.8°F |
| Sun | 63.8°F | 63°F | 63.7°F |
Daily averages from Open-Meteo for Wilmington, DE 19801. Readings refresh every six hours.
Interpretation
What this means for your grass.
- Bermuda
- Bermuda's growth is slowing toward dormancy. Stop pushing nitrogen. Soil is already below the 70°F annual bluegrass germination point, so fall pre-emergent is late, but it still blocks the seed that germinates over the next couple of months.
- Zoysia
- Zoysia is slowing toward dormancy. Stop nitrogen. Soil is below the 70°F annual bluegrass germination point, so fall pre-emergent is late but still worth putting down for later-germinating seed.
- St. Augustine
- St. Augustine's growth is winding down and the fall pre-emergent window is closing: soil is at or below 70°F, so annual bluegrass is germinating. Apply now if you haven't, and expect to treat some weeds that are already up.
- 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 Wilmington
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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 Mon, 12 Oct 2026 00:07:29 GMT