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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 #109 – February 2026

March 6, 2026 By Nigel Marriott

The UK weather in February was warm, wet and dark for this time of year.  We also had the 2nd lowest range of temperatures on record with maximum and minimums across the 24 hours varying by only 4.5 degrees on average.

[Read more…] about UK Weather Tracker #109 – February 2026

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

UK Weather Tracker #108 – January 2026

February 2, 2026 By Nigel Marriott

The 2026 calendar year in the UK began with a wetter January than usual but otherwise the weather in this month was unremarkable.

[Read more…] about UK Weather Tracker #108 – January 2026

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

UK Weather Trends #39 – Annual Temperatures in 2025

January 6, 2026 By Nigel Marriott

The year 2025 was both the hottest and 2nd hottest year on record in the UK.  Last year, I used a CUSUM Chart to conclude “if the calendar year average is greater than 9.48 degrees Celsius and the meteorological year average is greater than 9.33 degrees Celsius … (this will) signal an upwards trend change“.  By co-incidence, the average 24-hour temperature across the UK in 2025 was 10.09 degrees Celsius for both the calendar (Jan to Dec) and the meteorological (Dec to Nov) years which is clearly higher than these thresholds.  It’s only taken me four years of writing to conclude a new upward trend in UK temperatures has begun.

[Read more…] about UK Weather Trends #39 – Annual Temperatures in 2025

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

UK Weather Tracker #107 – December 2025

January 5, 2026 By Nigel Marriott

The 2026 meteorological year in the UK began with a warmer and less frosty December than usual but otherwise the weather in this month was unremarkable.

[Read more…] about UK Weather Tracker #107 – December 2025

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

UK Weather Trends #38 – Autumn 2025

December 3, 2025 By Nigel Marriott

The UK autumn in 2025 was warmer and wetter than usual but not exceptionally so and continues to be consistent with the step change in our autumnal climate seen 25 years ago.

[Read more…] about UK Weather Trends #38 – Autumn 2025

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

UK Weather Tracker #106 – November 2025

December 3, 2025 By Nigel Marriott

The weather in the UK in November was warmer and wetter than usual but not to an unusual extent.

[Read more…] about UK Weather Tracker #106 – November 2025

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

UK Weather Tracker #105 – October 2025

November 4, 2025 By Nigel Marriott

Like last month, the weather in the UK in October was unremarkable.  I must confess I found myself noticing the cold more than usual but perhaps I was subconsciously noticing the lack of sunshine and the narrow range of temperatures as shown in my refreshed dashboard below?

[Read more…] about UK Weather Tracker #105 – October 2025

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

UK Weather Tracker #104 – September 2025

October 4, 2025 By Nigel Marriott

After the hottest summer on record, the weather in the UK in September was unremarkable.  However, my local fishing club has just announced that a lake closed due to low water levels has reopened since water levels are back to normal so the above average rainfall in September has been welcomed in many areas.

 

[Read more…] about UK Weather Tracker #104 – September 2025

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

UK Weather Trends #37 – Summer 2025

September 7, 2025 By Nigel Marriott

The 2025 meteorological summer in the UK was the warmest on record.  This came less from heatwaves setting new temperate peaks and more from steady warmth throughout June, July & August.  Overall it was sunnier and drier than usual in the UK but not to any significant degree.  As a result, whilst the 1st principal component confirms the summer can be regarded as a “good summer”, it was a long way from being an exceptional summer like 1976 & 1995.

[Read more…] about UK Weather Trends #37 – Summer 2025

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

UK Weather Tracker #103 – August 2025

September 7, 2025 By Nigel Marriott

It was the 8th warmest August on record in the UK.  When combined with the 5th warmest July and the 2nd warmest June, the result was the warmest summer on record.  Otherwise, the weather on average in the UK continues to be unremarkable in terms of rainfall and sunshine but that disguises some significant regional variations.
[Read more…] about UK Weather Tracker #103 – August 2025

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

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