Armagh Observatory, 3rd February 2017: Armagh Observatory reports that January 2017 was rather warmer than average, very dry and sunnier than average. This was the driest January at Armagh for 20 years, that is, since the exceptionally dry January 1997.
Total precipitation was 27.6 mm (1.09 inches), including six trace values, which is less than 38% of the average January precipitation at Armagh. This was the driest January at Armagh since 1997 and the ninth-driest January on record at Armagh, that is, since the Observatory's daily rainfall records began in 1838. The wettest day was the 30th with 9.8 mm of rainfall, followed by the 12th with 5.5 mm. There were two days with light snow cover, each with less than a couple of centimetres of snow lying.
The mean temperature was approximately 5.6 degrees Celsius (42.0 degrees Fahrenheit), slightly cooler than last January but still nearly 0.9 C warmer than the most recent (1981-2010) 30-year average January temperature at Armagh and almost 1.5 C warmer than the long-term (1796-2010) average.
The warmest day (that is, the highest maximum air temperature) was 11.7 C, a maximum that was reached on both the 10th and 25th January. The coldest day (lowest maximum air temperature) was 2.5 C on the 12th. The warmest night (highest minimum air temperature) was 8.3 C on the 25th, and the coldest night (lowest minimum air temperature) was -4.0 C on the 23rd. There were several sharp ground frosts, the coldest of which, on the 23rd, had a minimum grass temperature of -10.4 C. In all, there were 14 nights with ground frost and 10 with air frost.
January 2017 was also slightly sunnier than average, registering 52.0 hours of strong sunshine, a little over 4% more than the long-term (1881-2010) average at Armagh and 12% more than the most recent (1981-2010) 30-year average.
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; mebarm.ac.uk; URL: http://climate.arm.ac.uk
Last Revised: 2017 February 7th