Belmont Soil Temperature Tracker

Belmont, NC 28012 · Gaston County · loading…

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Soil Explorers

What is the ground doing today? Let's dig in and find out.

Did you know?

  • Soil works like a blanket. A few feet down, the ground stays about the same temperature all year long.
  • Earthworms dig deeper when the top of the ground gets too cold or too hot.
  • The ground holds heat after sunset, so the soil is often warmer than the air on cool nights.

Try this!

  • On the heat calendar, which month is the reddest? Which is the bluest?
  • On the day and night wave, which line is the flattest? Why do you think so?
  • Guess tomorrow's surface temperature. Check the "Tomorrow" button to see if you were close!

Dig deeper · detailed data

Science Lab

Hourly readings, long-term trends, comparisons with past years, and the raw data to analyze yourself.

How this works

  • Where the numbers come from: Open-Meteo, a free weather API. Current and forecast values come from weather models; history comes from ECMWF IFS and ERA5 reanalysis, which combine satellite, radar, and weather-station observations into a gap-free record.
  • Modeled, not measured: these are estimates for a grid cell about 9 km across that includes Belmont, not a thermometer in the ground. Real soil varies with shade, moisture, color, and soil type (lots of red clay here).
  • Depths: current readings and hourly charts use point depths of 0, 6, 18, and 54 cm (surface, 2.4″, 7″, 21″). Daily history uses depth layers: 0–7 cm (0–2.8″), 7–28 cm (2.8–11″), and 28–100 cm (11–39″).
  • Location: 35.24° N, 81.04° W. Data refreshes every time the page loads.

Questions to investigate

  • How many hours does the 7″ reading lag behind the surface reading each day? Does the lag change with the seasons?
  • Which year had the earliest spring warm-up? Was it also the warmest spring for air temperature?
  • Predict this year's fall 50°F date before it happens, then check.
  • Why might a thermometer pushed into a garden bed or a lawn read differently from these model numbers?