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Nigel Marriott's Blog

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

You are here: Home / Archive / UK Weather Tracker #47 – December 2020

UK Weather Tracker #47 – December 2020

January 7, 2021 By Nigel

The weather in the UK in the first month of the new meteorological year was wetter than usual but otherwise unremarkable.
The meteorological year starts in December which is why December appears as the 1st data point in the charts below.  More information on the layout of the charts can be found in this post.  Points lying between the upper and lower deciles are shown as open black circles, points lying between the deciles and minimum/maximum are shown as solid black circles and any month with a new record is shown as solid black squares.  All data is supplied by the Met Office and can be found here.

As I explained in October 2018, the addition of a Temperature Range chart (B) means I update 7 charts every month so I rotate which 6 appear in the deck above and plot the 7th as a separate chart here.  Since it is now Winter, Sunshine (chart G) is shown here since that is of least interest in these months.

 

How abnormal was December 2020?

Chart H displays my UK Weather Abnormality Index (Scroll down my May 2019 post for details).  The closer to zero this index is, the less abnormal and thus more “average” a month is.  The higher it is, the more abnormal the month is.  When the index is over 100%, we can describe the month as unusual in some way.

The abnormality index was 60% in December 2020 which was in line with the median.

 


PS: If you bookmark this link, it will be refreshed with the latest month’s data.  I usually post the update in the first week of each month.

Click the relevant month to see my other weather trackers.  Alternatively click the Weather Tracker hash tag below this post to see a list of all such posts.

  • Click here for the latest month.
  • 2020 – January, February, March, April, May, June, July, August, September, October, November, December
  • 2019 – January, February, March, April, May, June, July, August, September, October, November, December
  • 2018 – January, February, March, April, May, June, July, August, September, October, November, December
  • 2017 – January, February, March, April, May, June, July, August, September, October, November, December 

For analysis of trends by seasons, please click on the relevant season from this list or the Weather Trends hashtag below this post.

  • 2020 – Winter, Spring, Summer, Autumn
  • 2019 – Winter, Spring, Summer, Autumn
  • 2018 – Winter, Spring, Summer, Autumn
  • 2017 – Winter, Spring, Summer, Autumn

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

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