What is the earths temperature a 100 feet down?

At a depth of 100 feet (about 30 meters), the Earth's temperature typically ranges from 50°F to 60°F (10°C to 16°C), depending on the geographic location and local geothermal gradients. This temperature is relatively stable compared to surface temperatures and tends to increase gradually with depth, averaging about 1°F (0.5°C) for every 100 feet in many areas. However, variations can occur based on factors such as soil composition, moisture content, and proximity to geothermal features.