An Average May but the Coolest Spring Since 1979

Armagh Observatory reports that the weather in May was somewhat wetter, and slightly sunnier and slightly cooler than average.

Precipitation amounted to 75.7 mm (2.98 inches), that is, about 30% more than the most recent (1981–2010) 30-year average. Over half the monthly rainfall fell on three days.

The number of hours of sunshine was 179.8, that is, about 5.5 hours more than the most recent (1981–2010) 30-year average.

The mean monthly temperature was 10.6 degrees Celsius (51.1 degrees Fahrenheit), which is about 0.5 C less than the most recent (1981–2010) 30-year average. There were eight nights with grass frost.

With both April and March being significantly cooler than average, the mean temperature of 7.1 degrees Celsius for the three months March, April and May made Spring 2013 the coolest spring at Armagh for 34 years, that is since the much colder spring of 1979.

These data refer to observations at Armagh Observatory, which has been recording the weather at Armagh since 1795.

FOR FURTHER INFORMATION PLEASE CONTACT: John McFarland at the Armagh Observatory, College Hill, Armagh, BT61 9DG. Tel.: 028-3752-2928; FAX: 028-3752-7174; jmfat URL:

Last Revised: 2013 June 5th