Hydropower produced 93.5% of Norway's electricity in May, according to Statistics Norway (SSB) on Monday.
The country produced 9.81 terawatt-hours (TWh) of electricity.
In addition to hydropower, the country produced 3.7% of its electricity from wind power and 2.9% from thermal power.
The extraction of crude petroleum and natural gas, and power-intensive manufacturing composed the largest share of consumption.
The Nordic country's electricity consumption increased by 6.9% in May, compared to the same period last year.
By Murat Temizer