The average temperature in Cuc Phuong is 21 Celsius (70 Fahrenheit), with a mean winter temperature of 9C (48F). High temperatures can reach above 30C (85 F) and lows are just above zero (32 F).

At the low elevations in the valley the temperature is hot and humid while at higher elevations the temperature drops and frostbite is a threat. On average it rains more than 200 days a year and the average annual rainfall is 2,100mm (7 feet). The dry season is November to February, the driest months being December and January.