Grono is a municipality in the Moesa Region in the Italian speaking part of the Swiss canton of Grisons.

[7] Before the merger Grono had an area, (as of the 2004/09 survey) of 14.83 square kilometers (5.73 sq mi).

Over the same time period the amount of forested land has increased by 25 ha (62 acres).

[13] The age distribution, as of 2000[update], in Grono is; 93 children or 10.2% of the population were between 0 and 9 years old.

[9] The historical population is given in the following table:[4] The Torre Fiorenzana is listed as a Swiss heritage site of national significance.

Grono features an oceanic climate (Köppen: Cfb), closely bordering on a humid continental climate (Köppen: Dfb) with hot, humid summers and cold, somewhat dry but quite snowy winters.

The nationwide record temperature of 41.5 °C (106.7 °F) was registered in Grono during the 2003 European heat wave on 11 August 2003.

[19] In comparison, the coldest temperature ever measured in Switzerland was −41.8 °C (−43.2 °F) in La Brévine.

The wettest month was August during which time Grono received an average of 164 mm (6.5 in) of precipitation over 10.6 days.

The driest month of the year was February with an average of 49 mm (1.9 in) of precipitation over 4.6 days.

A minority (21.3%) of the secondary sector employees worked in very small businesses.

[28] In 2014 the crime rate, of the over 200 crimes listed in the Swiss Criminal Code (running from murder, robbery and assault to accepting bribes and election fraud), in Grono was 50.2 per thousand residents, slightly lower than the national average (64.6 per thousand).

There were no drug crimes nor violations of immigration, visa and work permit laws.