North Devon is set for a week of temperamental weather due to the arrival of the polar maritime air mass.The air mass comes from northern Canada and Greenland and reaches the UK on a north westerly air stream, bringing with it frequent showers and potentially hail and thunder, too.Monday in North Devon should be mainly dry this week, with heavy rain on Tuesday and showers until Friday. Monday and Friday will be the warmest days of the week, with temperatures around the 14°C mark, however...
