Artificial turf is laid in various places, such as fields and parks. Previous studies have shown that an increase in surface temperature on the ground during the hot season causes environmental effects. This study measured the moisture content and the ground temperature of shallow ground covered by artificial turf for about five months. Compared with data collected from uncovered ground, the influence on moisture content is subtle, but the ground temperature is affected. Temperatures over 40 ℃ were recorded for several weeks in summer with small rainfalls. The approximate duration of the ground temperature rise can be predicted from rainfall and air temperature measurements.