Monday was not only memorable for its total cloud cover blocking out any possibility of sunshine but also no UV light triggered the sensor.
It was a very calm day. The anemometer, for long periods of time, was stationary with the maximum gust registering just 7mph. The movement of the air mass started from the southwest, slowly backed into the south for the largest part of the day and then into the south east.
In the evening and overnight further rain fell amounting to 6.0mm bringing the monthly total to 71.6mm, which is 79% of the 35year December average.
Tuesday was very dark after dawn with thick cloud low over the Marlboorugh Downs giving foggy conditions limiting visibility to 200 metres.