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Nigel Marriott's Blog

An independent statistician using data to understand our world and to predict the future

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UK Weather Tracker #102 – July 2025

August 2, 2025 By Nigel Marriott

It was the 5th warmest July on record in the UK making it also the 5th month in a row where temperatures have exceeded the historical upper decile.  The weather in the UK continues to be unremarkable in terms of rainfall and sunshine but we are on track for the warmest summer and year on record.
[Read more…] about UK Weather Tracker #102 – July 2025

Filed Under: Archive Tagged With: Index, Presenting data, Weather, Weather Tracker

UK Weather Tracker #101 – June 2025

July 2, 2025 By Nigel Marriott

June 2025 was the 2nd warmest June on record in the UK, just behind the record set 2 years ago.  Otherwise, the weather in the UK was unremarkable.
[Read more…] about UK Weather Tracker #101 – June 2025

Filed Under: Archive Tagged With: Index, Presenting data, Weather, Weather Tracker

UK Weather Trends #36 – Spring 2025

June 6, 2025 By Nigel Marriott

Spring 2025 in the UK was both the hottest & sunniest on record as well as the 5th driest.  For sunshine, 2025 was even more extraordinary than the exceptionally sunny spring in 2020 and was the result of 3 very sunny months in a row.  For temperature, there was no doubt in my mind this time the data was correct unlike last year when I questioned whether spring 2024 was in fact the warmest in record.  The Met Office has not corrected the record so apparently it was.

[Read more…] about UK Weather Trends #36 – Spring 2025

Filed Under: Archive Tagged With: multivariate data, Presenting data, principal components analysis, standardisation, trend analysis, Weather, weather trends, z-scores

UK Weather Tracker #100 – May 2025

June 6, 2025 By Nigel Marriott

The 2nd sunniest May on record in the UK follows the sunniest ever April & the 3rd sunniest March and resulted in the sunniest spring on record.  I am not surprised that in many regions it was also the warmest spring on record.
[Read more…] about UK Weather Tracker #100 – May 2025

Filed Under: Archive Tagged With: Index, Presenting data, Weather, Weather Tracker

UK Weather Tracker #99 – April 2025

May 5, 2025 By Nigel Marriott

April 2025 was the sunniest April on record in the UK.  It beat the previous record set in 2021 which in turn beat the record set in 2020 during COVID19 lockdown.  There may be a theme but equally I’m not going to bet on all April’s being sunny.  Given March was also the 3rd sunniest on record, there’s a good chance this Spring will beat the extraordinarily sunny Spring of 2020.
[Read more…] about UK Weather Tracker #99 – April 2025

Filed Under: Archive Tagged With: Index, Presenting data, Weather, Weather Tracker

UK Weather Tracker #98 – March 2025

April 6, 2025 By Nigel Marriott

Finally we have more interesting weather in the UK in 2025!  March was warmer, drier and sunnier than usual but it was still cool at night which meant frost levels were normal.  Altogether, the month was fractionally below my definition of an unusual month.
[Read more…] about UK Weather Tracker #98 – March 2025

Filed Under: Archive Tagged With: Index, Presenting data, Weather, Weather Tracker

UK Weather Trends #35 – Winter 2025

March 5, 2025 By Nigel Marriott

Winter 2025 in the UK was unremarkable.  Last year I explained I believe our winters are following a steady trend to warmer and wetter winters which began in the early 1980s.  The data for the winter just gone doesn’t my conclusions.

[Read more…] about UK Weather Trends #35 – Winter 2025

Filed Under: Archive Tagged With: multivariate data, Presenting data, principal components analysis, standardisation, trend analysis, Weather, weather trends, z-scores

UK Weather Tracker #97 – February 2025

March 5, 2025 By Nigel Marriott

The weather in the UK in February was thoroughly unremarkable.
[Read more…] about UK Weather Tracker #97 – February 2025

Filed Under: Archive Tagged With: Index, Presenting data, Weather, Weather Tracker

UK Weather Tracker #96 – January 2025

February 9, 2025 By Nigel Marriott

It was the 5th brightest January on record in the UK but I doubt anyone noticed!  Otherwise, the weather was unremarkable.
[Read more…] about UK Weather Tracker #96 – January 2025

Filed Under: Archive Tagged With: Index, Presenting data, Weather, Weather Tracker

UK Weather Trends #34 – Annual Temperatures in 2024

January 7, 2025 By Nigel Marriott

The 2024 calendar year was the 4th hottest year on record in the UK.  Last year, I used a Control Chart to conclude “a step change upwards (in UK temperatures) has taken place but the pace of change is not yet clear“.  I am now less confident in my conclusion after updating with 2024 data, especially when I look at temperature trends based on the meteorological year of December to November instead.

[Read more…] about UK Weather Trends #34 – Annual Temperatures in 2024

Filed Under: Weather Tagged With: SPC, Statistical Process Control, t-test, temperature, trend analysis, Weather, weather trends

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