Rain is set to dominate the first half of the week across the country before giving way to drier conditions and more sunshine by next weekend. Highs will run between eight and 13 degrees Celsius through Thursday, then fall to six to ten degrees by Saturday, Weeronline reports.Overnight lows are set to stay well above freezing most nights. The exception will arrive in the night of Tuesday, when temperatures will drop to about zero degrees in the northeast and around four degrees in the south.