The light northerly airstream dominated the weather on Sunday being predominantly dry, just an occasional light shower in the afternoon, but noticeably cooler. The thermometer struggled to reach 13.4C being 1.3C below the average and the coolest day since 27th April. However, the clear skies overnight saw the temperature drop to a minimum of 1.1C at 06.15. This produced a ground frost, the first of the season, obviously just above the temperature needed for an air frost.
Sunday arrived with sunshine as soon as the sun rose above the horizon. An anticyclone just off the west coast of Ireland will maintain the light, northerly air stream, so an even cooler day prospect. This anticyclone has seen the pressure rise 11mb over the last twenty-four hours as it gets closer to the UK, with a reading of 1027.1mb at 08.00.