BWS said Sunday’s bone-chilling temperature fell to 47.7 Fahrenheit (8.7 Celsius) at 9.30 p.m., a record low for the date.
The previous low for March 5 was 52F recorded in 1978, the BWS’s deputy director James Dodgson said.
The last time the island recorded a low similar to Sunday’s was on February 27, 2006, when it dropped to 47.1F.
The island’s lowest recorded temperature was 43.3F on February 26, 1993.
Dodgson said cold north-to-northwesterly outbreaks were often accompanied by blustery showers, some of which can produce small hail, as was the case on Sunday.
The island began to warm up again with a high of 63F forecast for Tuesday, climbing to 65F on Wednesday.