None of the matches in the top flight reached a conclusion, although Bletchley Town were in a decent position against high flying Cumnor before rain stopped play.
Town were put into bat on a green track, but found batting easy, as Ed Packard (79) and James Sprittles (61) added 102 for the second wicket.
Only off spinner Adam Cook (3-60) enjoyed much success with the ball as the hosts reached 209-4 from 51 overs.
Cumnor had struggled to 33-0 after 15 overs in reply when the heavy rain made any further play impossible.
Bletchley Town 6pts, Cumnor 6
Leaders Dinton made 222-7 at home to Oxford 2nd, with Lee Marland (66), Ashley Smith (46) and Adam Mould (32) all batting well.
Ian Evans took 3-58 for the visitors, who only faced eight balls in reply before a shower put paid to any further action.
Dinton 6, Oxford 2nd 6
Only 9.3 overs were possible as Shipton-under-Wychwood reached 21-1 at home to Buckingham Town before the weather intervened.
Shipton 6, Buckingham Town 6
The other two matches were abandoned before a ball was bowled, with Banbury Twenty, Horspath, Oxford Downs and Bicester & North Oxford all collecting six points on a frustrating day.
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