After the coldest night since January, Friday during daylight hours, brought us the coldest day since 5th March as after the hard frost the thermometer struggled to reach 5.4C at 13.46. However, we were not encased in fog that was close to the north, and occasionally crept over the Marlborough Downs towards Marlborough but not reached, as we enjoyed 3.4 hours of sunshine in the morning that faded away after 13.00. The temperature dipped to 3.3C late afternoon at 16.00 before recovering overnight to reach 7.1C at 08.00 on Saturday. The wind on Friday was from the northeast but a subtle change late in the afternoon on Friday saw it veer into the east allowing slightly warmer and moist air to arrive.
A fragmented band of rain crossed the area during the early hours of Saturday producing 0.7mm of rain that triggered the rain gauge at 04.45.
Saturday dawned with fog that limited visibility at first to 200m. I suspect that the fog is due more to a very low cloud base than the moist air travelling over the cold ground condensing in the almost still air.