Durham v Northamptonshire finishes as a draw after a second successive day is abandoned without a ball being bowled.
Nottinghamshire and Hampshire draw after a third straight washout, while other games are also affected by bad weather.
South African Ricardo Vasconcelos makes an unbeaten 105 as Northants rally well to lead against Durham at the Riverside.
Ben Raine and Brydon Carse came to Durham's rescue with an unbroken century stand on day one against Northamptonshire.
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Durham captain Cameron Bancroft says he is happy to be enjoying his cricket again and would like to see David Warner and Steve Smith play for Australia at this year's World Cup.
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How to get into cricket - physical exertion with a chess-like element in matches which range from half an hour to five days.