DULLEST JUNE AT ARMAGH FOR EIGHT YEARS, WARMER AND SLIGHTLY WETTER THAN AVERAGE
Armagh Observatory reports that June 2020 was much duller than average, the dullest June for eight years and the sixth-dullest June on record at Armagh. It was also slightly wetter and warmer than average. Total precipitation was 69.85 mm (2.75 inches), including 1 trace value (i.e. 69.80 mm if trace values are ignored). This is 10.5% more than the long-term (1838–2010) average June precipitation at Armagh and nearly 20% more than the most recent (1981–2020) 30-year June average. The wettest day was the 27th with 13.4 mm (0.53 inches) of rainfall, followed by the 22nd with 7.2 mm.
Thunder was noted on three days of the month: early afternoon on the 5th, late afternoon and evening on the 15th, and very early in the morning on the 26th. A flock of gulls was observed passing over the Observatory shortly after the thunder, lightning and heavy rain on the evening of the 15th. The mean monthly temperature was 14.66 degrees Celsius (58.4 Fahrenheit), approximately 1.26 C warmer than the long-term (1796–2010) average June temperature at Armagh 0.80 C warmer than the most recent (1981–2010) 30-year June average. This was the warmest June at Armagh for two years, that is, since June 2018 (mean temperature 16.16 C).
The warmest day (highest maximum air temperature) was 25.9 C (78.62 F) on the 1st. This was the warmest day of the year so far. The second and third warmest June days this year were the 25th (25.8 C) and the 2nd (25.4 C). The warmest night (highest minimum temperature over the previous 24 hours) was 15.6 C recorded on the 26th, followed by 13.5 C on the 24th. The night of the 25th/26th was the warmest June night at Armagh for 13 years, that is, since the night of the 11th/12th June 2007, which achieved the
same highest minimum temperature (15.6 C).
The coolest day (lowest maximum air temperature) was 11.9 C on the 6th, followed by 13.1 C on the 28th. The coolest night (lowest minimum air temperature over the previous 24 hours) was 3.0 C on the 8th, preceded by 5.8 C on the 6th. There were two nights with ground frost, that is, with a minimum grass temperature less than or equal to 0.0 C. These ground frosts were recorded on the 8th and 9th June, with grass-minimum temperatures of -4.9 C and -0.7 C respectively. There were no nights with air frost.
This June was much duller than average, recording a total of only 90.4 hours of strong sunshine, just 52% of the long-term (1881–2010) June average at Armagh and approximately 63% of the most recent (1981–
2010) 30-year June average. This was the sixth-dullest June on record at Armagh and the dullest June for eight years, that is, since June 2012 (87.2 hours of strong sunshine). The sunniest day was the 1st, with 14.4 hours of strong sunshine, followed by the 5th with 11.7 hours.
These data refer to observations at Armagh Observatory, which has been recording the weather at Armagh since 1795.
FOR FURTHER INFORMATION PLEASE CONTACT: Mark Bailey at the Armagh Observatory, College Hill, Armagh, BT61 9DG. Tel.: 028-3752-2928; FAX: 028-3752-7174; firstname.lastname@example.org; URL: http://climate.armagh.ac.uk/.