An historical perspective of the climate statistics for Coventry during December 2018


Temperature

This decade (6.1C) has seen average December temperatures 2C warmer than the first decade of the 21st century (4.1C). It has been the warmest December decade in records dating back into the 19th century, with 1971-1980 the previous record at 5.2C.

So, it is no surprise to find that December 2018 has been yet another mild month (average = 6.8C), 2.2C higher than Coventry’s 30-year mean (1981-2010). It has been the 8th milder than average December in succession in Coventry.

So, it has been our mildest December since 2015 9.7C), which itself was the warmest December in records dating back to 1892.

We find that only six December months have been milder than December 2018 in the past 126 years, as shown below:

9.7C                2015                             

7.5C                1898,1974      

7.4C                1988                           

7.1C                1900                           

6.9C                1918                           

 

There were just 3 air frosts during the month, though in 2015 there were none, and just one in 1977, 1989, 1998 and 2013.



Rainfall


Although not as wet as December 2017 (97.6mm), we have recorded 31% more rainfall than average in December 2018 (80.8mm), so it has been another wet December in the city.

Only 4 December months have been wetter than December 2018 in Coventry since the Millennium; December 2015 was the wettest December in Coventry (102.4mm) since 2012 (116.7mm), though as a contrast, December 2016 was relatively dry with just 23.0mm of rain.

There was no recorded December snow fall this year for the 4th December out of the past 6; only one December ( 7 days in 2017) has seen any snow lying in the past 8 years.

December snowfall does seem to be coming more of a rarity these days with just an average of 2 snow days in this current decade, compared to 3.3 2110-2010 and 3.8 between 1991 and 2000.


Sunshine


There has been a steady increase in December sunshine totals in Coventry since the 1980s (45.7hr), with 37% more sunshine recorded in the city this decade so far ( 62.8hr).

Having said that, December 2018 ( 57.5hr) has been our dullest December since 2015 (41.1hr), though this is still 3% above Coventry 30 year averages (1981-2010).

However, only 3 December months have recorded sunshine totals lower than these 30 year averages since the Millennium.

Steve Jackson

Bablake Weather Station

Coventry UK