Temperatures across the UK ranged from a high of 5C in the southwest of England to freezing in parts of Scotland.
The Met Office tweeted: “A cold and frosty start for many with sunshine and a few wintry showers.”
The agency added that sunshine, wintry showers and cold temperatures should be expected for the remainder of the day.
Twitter users shared photos of the spring sunshine showing snow settled on the ground.
Snow fell in parts of the UK, including Manchester, on Saturday after northerly air spread down across country from the Arctic.
But temperatures are expected to be warmer and brighter in the coming week, with a possible high of 17C on Thursday.
Dry and sunny spells are also expected on Tuesday and Thursday and no weather warnings have been issued for Monday, when all shops and outdoor hospitality venues are set to reopen in England.
From tomorrow, zoos and theme parks can welcome visitors, while pubs will be allowed to serve people seated outside. Campsites can reopen and self-catering holidays will be allowed.
People will also be able to travel in and out of Wales to the rest of the UK, while in Northern Ireland 10 people from two households can meet outdoors for the first time since lockdown restrictions were reimposed.