By Tuesday, temperatures in parts of north and west Scotland and west Northern Ireland may exceed 20C (68F). However, by Wednesday, eastern Scotland and eastern England will experience cooler temperatures of 9-13C (48-55F) amid some cloud cover, while later in the week, parts of England and Wales could see highs of 20-22C (68-72F). Gardeners should be cautious as nighttime temperatures remain chilly, with potential for light frost in many areas outside urban centers early in the week.