April 2021 Weather in Armagh – Astronotes


Armagh Observatory stories that April 2021 was drier and sunnier than common at Armagh, however a lot cooler. It was the seventh driest April at Armagh since each information of precipitation started in 1838, and the driest for 4 years. Though the whole variety of hours of sturdy sunshine almost equaled that in the course of the exceptionally sunny April 2020, this yr’s April was a lot cooler.
Complete precipitation was 12.three mm (0.48 inches) together with 2 hint values (that’s, 12.2 mm if hint values are ignored). That is lower than 1 / 4 of the 183-year -term (1838–2020) common April precipitation at Armagh (52.Eight mm) and simply over a fifth of the latest (1991–2020) 30-year April common (55.9 mm). The wettest day was the 29th, with 2.5 mm (0.10 inches) of rainfall, adopted by the eighth with 2.1mm.

The imply month-to-month temperature was 7.four levels Celsius (45.four Fahrenheit), which is roughly 0.5 C cooler than the 225-year long-term (1796–2020) common April temperature at Armagh (7.9 C) and 1.four C cooler than the latest (1991–2020) 30-year April common (8.Eight C). This was the good April at Armagh for 5 years, that’s, since April 2016 (7.Zero C).
This April was uncommon in being cooler than the earlier month (March), an occasion that happens on common solely as soon as each ten or twenty years within the long-term Armagh report. It was additionally uncommon in having a sample of climate dominated by areas of excessive strain and with few if any intervals of conventional April showers. Snowflakes or snow pellets had been noticed on the fifth, sixth and 11th, and on the ninth.

The warmest day (highest most air temperature) was 18.6 C on the 24th, which was the warmest day of the yr to this point. This warmest April day was adopted by 17.6 C on the 26th. The bottom most air temperature was 6.6 C, which occurred throughout late night of the fifth, adopted by 8.four C throughout late night of the sixth.
The best minimal air temperature was 7.Zero C, recorded throughout early morning of the 27th, adopted by 6.7 C on the . The bottom minimal air temperature was minus 2.5 C, a worth that occurred throughout early morning on each the 10th and 11th.
There have been a number of fairly sharp floor frosts among the many 24 nights with recorded floor frosts (minimal grass temperature lower than or equal to zero), the coldest three of which had been -11.5 C on the 10th, -10.6 C on the 11th and -8.5 C on the 23rd.
There have been 5 days with nighttime air frosts.

This April was exceptionally sunny, with almost the identical variety of hours of sturdy sunshine as in April 2020, that’s, 210.5 hours in comparison with 213.7 hours, making April 2021 the third sunniest April at Armagh since sunshine information started on the Observatory round 1881. This April was roughly 40% sunnier than the latest (1991–2020) 30-year common (149.9 hours).
The sunniest day was the 24th with 12.7 hours of sturdy sunshine, adopted by the 2nd with 11.9 hours.

These information discuss with observations at Armagh Observatory, which has been recording the climate at Armagh since 1795.


Mark Bailey on the
Armagh Observatory, School Hill, Armagh, BT61 9DG.

Tel.: 028-3752-2928;

FAX: 028-3752-7174;


URL: http://local weather.armagh.ac.uk/.

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