Live soil temperature · 2 inches down
Soil temperature in Trenton, NJ
Right now · 08601
61°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
- 58.9°F
- 2 in depth
- 61°F
- 6 in depth
- 61.1°F
Past 14 days · 24-hour average
This week in Trenton
Over the past week, soil 2 inches down in Trenton, NJ ranged from 53.7°F to 61°F and held steady, averaging 58.1°F.
| Day | Surface | 2 in | 6 in |
|---|---|---|---|
| Mon | 59.8°F | 60.8°F | 61.7°F |
| Tue | 53.2°F | 55.8°F | 58.9°F |
| Wed | 52.9°F | 53.7°F | 55.6°F |
| Thu | 61.6°F | 61°F | 60.2°F |
| Fri | 56.7°F | 58.1°F | 59.6°F |
| Sat | 57.2°F | 57.5°F | 58.4°F |
| Sun | 59.9°F | 59.9°F | 60.2°F |
Daily averages from Open-Meteo for Trenton, NJ 08601. 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 Trenton
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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 00:06:22 GMT