#astronomy July 2021 Climate in Armagh – Astronotes
JULY 2021 MUCH DRIER, WARMER AND SUNNIER THANAVERAGE Armagh Observatory reviews that July was the driest at Armagh for 21 years, the warmest for eight years and the sunniest for 3 years.Whole precipitation was 25.55 mm (1.01 inches) together with three hint values (i.e., 25.four mm if hint values are ignored). This was roughly 35%
JULY 2021 MUCH DRIER, WARMER AND SUNNIER THAN
Armagh Observatory reviews that July was the driest at Armagh for 21 years, the warmest for eight years and the sunniest for 3 years.
Whole precipitation was 25.55 mm (1.01 inches) together with three hint values (i.e., 25.four mm if hint values are ignored). This was roughly 35% of the 183-year long-term (1838–2020) common precipitation at Armagh (73.four mm) and 37% of the newest (1991–2020) 30-year July common (69.zero mm), making this July the driest at Armagh since July 2000 (13.three mm), and the thirteenth-driest July at Armagh on file.
The wettest day was the 4th with 15.9 mm (zero.6 inches) of precipitation, largely related to a heavy thundery bathe round lunchtime that day. The second-wettest day was the 27th with 5.2 mm of rainfall. Thunder was famous on the 4th and through late afternoon on the 12th. A uncommon, spoked rainbow was noticed close to Clogher on the night of the twelfth.
The imply temperature (the month-to-month common of the every day most and minimal temperatures) was practically 17.9 levels Celsius (64.2 Fahrenheit). This was roughly three.zero C hotter than the 225-year long-term (1796 2020) common July temperature at Armagh (14.87 C) and practically 2.2 C hotter than the newest (1991–2020) 30-year July common (15.72 C). This was the warmest July at Armagh for eight years, that’s, since July 2013 (imply temperature 18.2 C), and the fifth-warmest July at Armagh since every day temperature information started on the Observatory round 1796. The 5 warmest Julys at Armagh are actually 1989 and 2013 (each 18.2 C), 1983 and 2006 (each 18.zero C) and 2021 (17.9 C).
July 2021 was exceptional for an exceptionally lengthy spell of scorching climate through the second half of the month. For every of ten days, from the 16th to 25th July, the utmost every day temperature reached or exceeded 26.zero C (78.eight F). The 21st briefly recorded a price (30.5C), which at that time was the very best ever recorded at Armagh. This file was damaged the next afternoon (the 22nd) by 31.three C, equalling that reported from Castlederg, Co. Tyrone, the day gone by. The UK Meteorological Workplace defines a warmth wave in Northern Eire to be any interval of at the least three consecutive days when the utmost every day temperature meets or exceeds 25.zero C (77.zero F), so brief warmth waves are usually not unusual. Nonetheless, these lasting at the least ten days are rather more uncommon. The final time this occurred at Armagh throughout July was 38 years in the past throughout a spell of scorching climate lasting from the sixth to 15th July 1983.
July is often, however not all the time, the warmest month of the yr. Over the past 40 years, the imply July temperature at Armagh has been a mean of 1.8C hotter than June and zero.four C hotter than August. It’s due to this fact fascinating to notice that in a world of accelerating world common temperatures latest 30 yr July common temperatures at Armagh have been slowly rising. Thirty years in the past, the (1961-1990) 30-year common was 15.2 C whereas the newest (1991-2020) 30-year common is 15.7 C. That is in step with common summer time temperatures at Armagh growing roughly according to world warming, at the moment at roughly 1.7 levels Celsius per century.
The warmest day this month (highest most air temperature) was 31.3C (88.three F) on the afternoon of the 22nd, preceded by 30.5 C on the 21st and adopted by 29.2 C on the 23rd. The coldest day (lowest most air temperature) was 18.zero C, which occurred on three days: the 28th, 29th and 31st. The best minimal air temperature was 15.1 C on the morning of the 22nd, and the bottom minimal air temperature was 10.zero C on the seventh. There have been no nights with floor frost (grass minimal temperatures lower than or equal to zero Celsius).
This July additionally recorded a complete of 160.zero hours of sturdy sunshine at Armagh. That is roughly 18% greater than the corresponding 140-year (1881-2020) long-term common (135.6 hours) and practically 19% greater than the newest (1991-2020) 30-year common (134.eight hours). This was the sunniest July at Armagh for 3 years, that’s, since 178.9 hours of sturdy sunshine was recorded in July 2018.
The sunniest days have been the 16th and 17th, which each recorded 13.6 hours of sturdy sunshine, adopted by the 21st with 13.1 hours. These knowledge discuss with observations at Armagh Observatory, which has been recording the climate at Armagh since 1795.
For additional info, please contact:
Professor Mark E. Bailey
Emeritus Director of Armagh Observatory
Armagh Observatory and Planetarium