Ferrera is a municipality in the Viamala Region in the Grisons, Switzerland.

The combined historical population of the two municipalities is given in the following table:[3][4] Innerferrera village in Ferrera has an average of 118.2 days of rain per year and on average receives 1,238 mm (48.7 in) of precipitation.

The wettest month is August during which time Innerferrera receives an average of 158 mm (6.2 in) of precipitation.

The driest month of the year is February with an average of 44 mm (1.7 in) of precipitation over 12.2 days.

[5] Media related to Ferrera at Wikimedia Commons