An historical perspective of the climate statistics for Coventry during July 2021

Temperature

There has been a 1.5C warming during July in the past hundred years, with average monthly temperatures of 17.6C from 2011-20, compared to 16.1C in the decade 1911-1920. In between times however, it was a much cooler month fifty years ago with mean monthly temperatures in the 1960s just 15.5C.

 

With an average monthly temperature of 18.7C, July 2021 has been 3.2C warmer than would have been expected 50 years ago, but only the warmest in recent years since 2018 (20.1C).

 

However, looking even further back in our records, we find that only 7 July months have been warmer than 2021 since records were first kept in Coventry in 1892 (1911, 1983, 1994, 1995, 2006, 2013 and 2018).

 

Note that this July has even been warmer than the much vaunted 1976 (18.5C)!

Rainfall

July rainfall totals are the most variable of any month in Coventry. The 1940's were particularly dry (48.4mm) for example, compared to the 1930's (76.7mm). In recent years, the trend has been for wetter July months since the Millennium (2001-2020 average of 68.8mm), with just 49.4mm as the July rainfall mean in the 1990s.

Although it was particularly dry through mid-month, with just 0.8mm of rain from the 7th to the 26th July, July 2021 has been the wettest July (92.0mm) in Coventry since 2012 (99.4mm).

It is interesting to note that 66% of the monthly rainfall fell towards the end of the month in the 4 days from the 27th to the 30th.

Looking back through the archives, we find that only 7 July months have been wetter than 2021 since 1980 (1988, 1991, 1992, 2007, 2008, 2009 and 2012).

Sunshine

The July months of the 1990's were not only the warmest decade on record in Coventry, but they were also the sunniest (average 220.6hr). By comparison the 1960's were remarkably cool and dull (average sunshine just 147.4hr).

There has been a decrease in average sunshine however in Coventry since the Millennium, with a mean of 192.0hr from 2001 to 2020.

With 205.3hr of sunshine, this has been the sunniest July in Coventry since 2018 (265.4hr), though only 4% higher than the 30-year Bablake average 1991-2020, not exceptional at all in historical records, ranking 34th sunniest in the past 126 years.

Even so, given the depressed sunshine figures so far this century, only 4 July months have been sunnier than 2021 since the Millennium (2006, 2013, 2014 and 2018).