Climate Mo i Rana's climate is usually classified as subarctic (Köppen Dfc bordering on Dsc), with long, cold winters, and short, warm summers. Mo I Rana is situated about from the coast line, giving it colder winters than towns at the coast. There is much precipitation due to the mountains north and east of town, often with much snow in winter. Blizzards in winter can go on for hours, potentially creating traffic difficulties and cancelling flights. Because of Mo i Rana's latitude, summer days are very long and winter days are very short on daylight. In the winter season, the Northern Lights can be seen on the night sky. It varies in intensity, coloured from white green to deep red, and comes in different shapes, such as beams, arches and draperies. thumb|280x280px|Sky view of Ranfjorden; Mo i Rana is down to the right; the river is also visible July and August are the warmest months; July mean is and average daily high (1991–2020). There are usually two to three warm periods during the summer, when the average temperature is between at daytime. The warm days may last for 2–14 days, with the temperature peaking at . On rare occasions, the overnight low does not go below , known in Norway as tropical night (tropenatt Norwegian).
Climate Mo i Rana's climate is usually classified as subarctic (Köppen Dfc bordering on Dsc), with long, cold winters, and short, warm summers. Mo I Rana is situated about from the coast line, giving it colder winters than towns at the coast. There is much precipitation due to the mountains north and east of town, often with much snow in winter. Blizzards in winter can go on for hours, potentially creating traffic difficulties and cancelling flights. Because of Mo i Rana's latitude, summer days are very long and winter days are very short on daylight. In the winter season, the Northern Lights can be seen on the night sky. It varies in intensity, coloured from white green to deep red, and comes in different shapes, such as beams, arches and draperies. thumb|280x280px|Sky view of Ranfjorden; Mo i Rana is down to the right; the river is also visible July and August are the warmest months; July mean is and average daily high (1991–2020). There are usually two to three warm periods during the summer, when the average temperature is between at daytime. The warm days may last for 2–14 days, with the temperature peaking at . On rare occasions, the overnight low does not go below , known in Norway as tropical night (tropenatt Norwegian).