Malappuram district is located in the Indian state of Kerala, and has a tropical monsoon climate. The district experiences heavy rainfall during the monsoon season, which lasts from June to September. The average annual rainfall in the district is about 3000 mm. The district also receives some rainfall during the post-monsoon season (October-November) and the winter season (December-February). 

The temperature in Malappuram district remains relatively stable throughout the year due to its proximity to the sea. The average temperature in the district ranges from 24°C to 32°C. The humidity in the district is high throughout the year due to its coastal location, and ranges from 70% to 85%. 

Overall, Malappuram district has a warm and humid climate, with heavy rainfall during the monsoon season.