A Cool, Wet September

Armagh Observatory reports that September was wetter, brighter and cooler than average.

Rainfall amounted to 86.3 mm (3.40 inches), that is, about a quarter more than the most recent 30-year (1981-2010) monthly average, although four of the last six Septembers were wetter still. The wettest day was the 24th when 40.2 mm fell.

The number of hours of sunshine was 123.8, that is, just under 9% more than the most recent 30-year average. September 2012 was the sunniest recorded at Armagh since 2003.

The mean monthly temperature was 12.6 degrees Celsius (54.7 degrees Fahrenheit), which is about 0.6 degrees Celsius below the most recent 30-year average. This was the coolest September recorded at Armagh since 1994. The warmest days occurred on the 3rd and 8th with maximum temperatures of 22.0 deg. C. The coldest air temperature was 1.5 deg. C on 22nd.

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 signarm.ac.uk; URL: climate.arm.ac.uk.

Last Revised: 2012 October 2nd