In the Premier Division, third-placed Three Bridges v top-of-the-table Preston Nomads, and East Grinstead v Brighton & Hove were both cancelled without a ball being bowled.
The other fixtures saw the first innings completed before the weather took hold.
Sean Heather (59) and Mahesh Rawat (101*) starred for Middleton (257-8) in their abandoned game with Haywards Heath (88-0). Heath's Jonny Phelps struck an unbeaten 51 off 31 balls before the rain intervened.
Cuckfield (44-8) were grateful for the rain's assistance at Eastbourne (149-8).
And wicketkeeper Harry Scowen hit 66 for bottom-of-the-table Hastings & St Leonards Priory (147-9dec) in their abandoned game at home to reigning Premier Division champions Roffey (27-0).
Meanwhile, Chichester Priory Park (86-5) v St James's Montefiore was the only game in Division 2 to see any action.
Roffey 2nd XI v Bognor Regis, Horsham v Mayfield, the Mid Sussex derby between Lindfield and Burgess Hill, and Preston Nomads 2nds v Billingshurst were all called off before the start of play.
Other notable performances:
Division 3 East: Luke Payton 144 off 91 balls for Rye.
Division 4 West: Hywel Jones 168 not out for Steyning.
Division 6 West: Richards Hobbs 104 off 65 balls for Rustington.
Division 7 West: Harry Hood 103 off 74 balls for Bognor Regis 2nd XI, Roshan Gamage 104 not out for Slinfold 2nd XI.
Division 9 West: Charlie Caddy 100 off 97 balls for West Wittering 2nd XI.
Division 10 Central: James Witt 5-15 for Edenbridge 2nd XI.
Division 11 West (South): Alex Ryder 5-43 for Aldwick 2nd XI, Ian Guppy 60 not out off 19 balls for Aldwick 2nd XI.
Division 11 Central (South): James Pitchford 100 not out and Andrew Parle 99 for St Peters 4th XI
Division 12 West (North): Matt Hennings 114 not out off 100 balls for West Chiltington & Thakeham 4th XI.
Division 12 East (South): Graham Corke 5-12 for Westfield 2nd XI.