uk_monthly_climate_summary_201909.pdf
, and the 20th saw 11.6 hours of sunshine at Aldergrove (County Antrim) and at Magilligan (County Londonderry). 21st to 30th The weather quickly turned very unsettled and often wet. The night of the 20th/21st was unusually warm in places with temperatures not dropping below 15.5 °C at Killowen (County Down