Technically Marlborough has now experienced a ‘heatwave’ as described by the Meteorological Office. We have now had three consecutive days when the maximum daily temperature exceeded 27C, the threshold set for Wiltshire. The peak on Wednesday was 30.3C being a significant 11.4C above the 39-year average. It was the hottest September day I have recorded since this station was set up in 1984 and the hottest day of the year.
It was also a very warm night as the thermometer did not drop below 16.9C, recorded at 05.23 on Thursday, being 7.6C above the long-term average.
The UV level is still peaking at High with the loss of equivalent rainfall through evaporation from ground sources and plantlife exceeding 3mm each day.
Thursday revealed a sun behind misty conditions, however, by 08.00 the thermometer had risen 19.5C. The barometric pressure continues higher reading o 1018.1mb at 08.00, thanks to an anticyclone centered over Scandinavia.
Update at 17.30: cloud encroaching late afternoon limited temperature rise to 29.8C. Maximum of 30.3C yesterday. Evidence of Saharan dust on car this morning.
