Ar y cyfan, mae cynnydd wedi bod yn nifer yr achosion ar draws Cymru, a hynny mewn telerau absoliwt ac fel cyfran o nifer y bobl sy’n cael eu profi.  Fodd bynnag, mae’r darlun ehangach yn fwy cymhleth oherwydd mae rhai rhannau o’r wlad wedi dod yn fannau problemus o ran y feirws, tra bo eraill ond wedi gweld un neu ddau achos ychwanegol.
Overall, there has been an increase in the number of cases across Wales, both in absolute terms and as a proportion of the number of people being tested. However, the wider picture is more complex as while some parts of the country have become coronavirus hotspots, others have seen just single-digit increases in cases.