Located in northwest Hainan, it is 56 km (35 mi) wide (east to west) and 70 km (43 mi) long (north to south).
It has a total land area of 2,067.6 km² (798.3 sq mi).
Climate-wise, it is tropical with ample sunshine and moderate rainfall all year round; on average, the county receives 2060.5 hours of sunshine and 1,756 mm (69.1 in) of rain each year.
The average annual temperature is 23.7 °C (74.7 °F).

With a total land area of 206.7 km² (79.8 sq mi), melons and other tropical crops are grown around the county.

More than 20 rivers flow through the county, providing 17.4×10⁹ m³ (610×10⁹ cu ft) of water per year.
Located in northwest Hainan, it is 56 km (35 mi) wide (east to west) and 70 km (43 mi) long (north to south). It has a total land area of 2,067.6 km² (798.3 sq mi). Climate-wise, it is tropical with ample sunshine and moderate rainfall all year round; on average, the county receives 2060.5 hours of sunshine and 1,756 mm (69.1 in) of rain each year. The average annual temperature is 23.7 °C (74.7 °F).
With a total land area of 206.7 km² (79.8 sq mi), melons and other tropical crops are grown around the county.
More than 20 rivers flow through the county, providing 17.4×10⁹ m³ (610×10⁹ cu ft) of water per year.
Chengmai County