Locals and tourists in the city of Rovaniemi in Finland's Lapland were treated to a magnificent display of colourful Northern Lights in the Arctic sky overnight from Friday to Saturday last weekend.

The Northern Lights, also known as Aurora Borealis, started their dance at around 10.30pm local time, to the delight of local photographers and a few tourists visiting Lapland in northern Finland.

The auroras kept showing for several hours and while it looked like the show was coming to an end at around 2am, they came back even stronger, lighting up the sky without interruption for over 30 minutes in a myriad of colours from fluorescent greens and white to pink and purple.

The end of September is usually a good time for spotting the Northern Lights, a result of electrically charged particles from the sun entering the Earth's atmosphere.