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Weather Statistics for September

Looking back at September as a whole it turned out to be a fairly average month, although there were a few notable events. For the first time in 4 years we saw temperatures reach 30 degrees and a few long running observing sites recorded their highest September temperature on record, although the end of the month saw more unsettled weather and cooler air, including a record low September temperature for Northern Ireland.

The first few days of September were rather unsettled, with frontal systems moving across from the west. Southern areas began to see less in the way of rain from the 9th onwards, whereas fronts continued to affect the north, with an especially wet period in western Scotland on the 12th/13th. Warm air moved into southern and eastern areas from the 14th, with a late-season hot spell bringing temperatures not far off 30°C on the 14th and peaking at 31.7°C on the 15th, and settled conditions continuing beyond that for another few days. However, around the 23rd the weather became more unsettled and decidedly cooler.


September rainfall was well below average for most regions of the UK, with only parts of western Scotland and East Anglia bucking this trend. Argyll and Bute received 203mm of rainfall, thanks mainly to heavy rain on the 12th while a slow-moving band of rain sat over much of the East Anglian coast on the 25th boosting rainfall levels here. Over the month Norfolk recorded 93.7mm of rain, 66% above its September average, with Houghton Hall receiving 45.2mm of rainfall on the 25th alone, while Cambridge weather station, around 55 miles inland, recorded no rainfall at all on that day.

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