A little sun, a little rain and mild

Saturday gave us just 32 minutes of sunshine and 5.7mm of precipitation.

The flow of mild, moist Atlantic air meant a very mild day with the maximum occurring not by day but by night in the early hours of Sunday when at 02.43 the thermometer read 12.8C. This was a significant 5C above 34-year average.

The minimum over the past twenty-four hors was set at 08.00 on Saturday with a reading of 8.8C as the temperature steadily rose throughout the morning and afternoon. This meant the minimum was almost 7C above average.

Sunday dawned still under the influence of the Atlantic air mass with the thermometer reading 12.0C at 08.00 when readings were taken. The wind, now from the south west, is moderate in strength bringing occasional short, light showers.

November 2018 review
November reversed the trend of six consecutive drier than average months with a total rainfall of 96.5mm, which was 5.2mm above the 34-year average. The extreme rainfall months of November occurred in 1990 with just 27.8mm and 203.5mm in 2002.

The wettest day occurred towards the end of the month with 16.0mm on the 27th although there were three other days when the daily rainfall ran into double figures. There were eleven totally dry days, a figure close to the average for this month.

The rainfall for the eleven months of January to November was 670mm being 83mm below the average. The extremes were 564mm in 1996 and 1043mm in 2014.

The late autumn month was slightly warmer than average, +0.7C, in contrast to September and October, which were a little below average.

We enjoyed two spells when the thermometer rose well above average due to mild, Atlantic air such as 5th to 15th, with several days at least 4C above average and the warmest day with 14.4C on the 6th. However, strong northeasterly winds brought an abrupt change from the 19th to the 26th when the opposite was true with the coldest day on the 22nd producing a maximum of only 4.5C being almost 6C below average.

An air frost was recorded on six days with the early morning of the 2nd being the coldest when the thermometer dropped to-2.0C. However, that was quite mild compared to the November 30th minimum in 2016 when the frost was severe, down to -7.3C.

Due to the passage of several Atlantic depressions, fortunately mainly to the west of southern England, we have survived a number of very windy days. The 6th to the 10th gave days with maximum gusts of 25mph and above with a peak gust of 38mph on the 9th. Storm Diana brushed close to the country at the end of the month so there were stormy days from the 27th to the 29th with the windiest day of the month occurring on the 29th with a peak gust of 47mph.

The average November sunshine total over the past four years, when that instrument was installed, stands at 39 hours but November 2018 gave us 70 hours of welcome strong sunshine.

Autumn 2018 review
Autumn, meteorologically, consists of the three complete months of September to November, purely for the ease of statistical calculations. The past autumn mean temperature was marginally above average (+0.2C).

Rainfall totalling 189mm was 49mm below the 34-year average. During the three months the equivalent rainfall of 101mm was lost through evaporation from ground sources and plant life, which was 14mm above the seven-year average, due to the drier than average September and October months.

A total of 358 hours of sunshine was recorded. That was well above the average for the past four years, which currently stands at 236 hours.