September continues run of heat months


The primary 9 months of this yr have provisionally been the warmest on file for the United Kingdom in a sequence which matches again to 1884.

September endured this yr’s run of each month up to now being hotter than common in keeping with imply temperature, with 13.4°C sitting at 0.5°C upper than the long-term common for the month.  

Mixed, the primary 9 months of 2022 were hotter than the similar duration in some other yr in a sequence which matches again to 1884. The former file for the January-September duration was once 2014, which went directly to be the United Kingdom’s warmest yr on file.

Dr Mark McCarthy of the Nationwide Local weather Data Centre mentioned: “The beginning of September endured the summer time’s theme of above common temperatures with top drive dominating. Because the month has stepped forward, an Atlantic affect has introduced extra unsettled climate, with some northerly winds in fresh days bringing temperatures additional down. 

“Even if 2022 is on target to be probably the most warmest years on file if the hotter than common stipulations persist, we will’t rule out a duration of beneath common temperatures throughout the approaching months which might deliver it beneath 2014’s imply temperature for the calendar yr.” 

Map of the UK that shows September 2022's mean temperature versus the long term average. The map shows near-average temperatures in the south and above average for much of the north.
September 2022 imply temperature as opposed to the long-term common for the month.

Close to-average rain this month

Overdue rain in September boosted totals to above common for some areas throughout the United Kingdom, even if now not sufficient to deal with the dry yr up to now.  

A mean of 101.3mm of rain fell throughout the United Kingdom in September, which is 11% greater than common. It was once a equivalent tale throughout the United Kingdom, with Scotland seeing 9% extra rain than common, England 10% and Wales 2%. Alternatively, Northern Eire had 58% extra rain than its common for the month, with a complete of 138.7mm falling.  

In spite of near-average rain for many in September, the primary 9 months of the yr have nonetheless been considerably dry, particularly in spaces to the south and east. Provisionally, rainfall from January-September 2022 in the United Kingdom has been 639mm. This makes the primary 9 months of the yr the driest since 2003 (595mm).  

For England, January-September 2022 has noticed 424mm of rain, which is the 9th driest for the duration and the driest since 1959 (400mm). East Anglia has been in particular dry, with 267mm of rain up to now this yr. That is the 3rd driest on file, with best 1921 (241mm) and 1929 (251mm) drier for a similar duration.  

Mark McCarthy added: “September’s near-average rainfall has performed little to offset the rainfall deficit constructed up over the yr up to now for some spaces of the United Kingdom, particularly within the south and east. 1976, which has lengthy been used because the yardstick for warm and dry climate, had an exceptionally rainy September, that means it not threatens the dry information at this level within the yr.  

“The affect of Atlantic climate techniques from the west has introduced with it some rain, with the overdue month rainfall managing to tip many spaces of the United Kingdom to totals relatively above common for the month of September.” 

Map of the UK showing rainfall amounts for September 2022 versus the long-term average. The map shows wetter than average conditions in the far south of England and the east of Scotland.
September 2022 rainfall quantities as opposed to the long-term common for the month.

Uninteresting for many

Sunshine hours had been in moderately brief provide for some, even if now not sufficient to hassle any information. The United Kingdom was once 8% duller than common with 117.3 hours of light. Wales was once in particular boring, with 25% fewer sunshine hours than common at 97.5 hours. Northern Eire, regardless of seeing greater than its justifiable share of rain, had 4% extra sunshine than common with 117.8 hours.

Map showing the average number of sunshine hours for the UK versus the long-term average. The map shows a predominantly duller than average month, especially in Wales.
September 2022 sunshine hours as opposed to the long-term common for the month.
Provisional September 2022 Imply temp (°C)   Sunshine (hours)   Rainfall (mm)  
  Exact  Diff from avg (°C) Exact % of avg Exact % of avg
UK  13.4  0.5  117.3 92   101.3  111
England  14.3  0.4  126.3 89  75.2  110
Wales  13.5  0.4  97.5 75  113.6  102
Scotland  11.9  0.6  107.1 100  134.7  109
N Eire  13.2  0.6  117.8 104  138.7 158



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