89.1 mm This Month

90.1 mm This Month.

90.9 mm This Month.

Final total for December here is 80mm making it a fairly wet month (156% average).

Grand total for 2020 here is 551mm, so a rather dry year here (93% average).  Our driest year since 2011, and drier by over 300mm compared to 2019 !

80.7mm during December, the third wettest month of the year, although wettest month October had over twice as much (170.7mm)

Entirely due to October, 2020 was the wettest year I've recorded since I started recording in 2017. Total rainfall was 787.5mm.

All of the above data is taken from the Scottish Environment Protection Agency (SEPA) wherever possible, but also from weathercast.co.uk (as data from SEPA still hasn't been updated since 11pm on 23 December 2020) and is for up until 10:00 UTC (10am GMT) on 1 January 2021.

Last Month's data runs from 09:00 UTC (9am GMT) on 1 December 2020

This winter's data runs from 09:00 UTC (9am GMT) on 1 December 2020

Last year's data runs from 09:00 UTC (9am GMT) on 1 January 2020

LTA = 1981-2010 average for the month, season or year in question at that particular station.

Overall, December 2020 was a substantially wetter than average month at both of those stations both in terms of the actual amounts and in terms of the number of official rain days. In terms of the actual rainfall amounts, it was the wettest December since 2015.

2020 as a whole as also substantially wetter than average at both of those stations, both in terms of the actual rainfall amounts and in terms of the number of official rain days. In terms of the actual rainfall amounts, it was the wettest year since 2012 and the second wettest year on record at Edinburgh Gogarbank.

Horrendous final total of 144.4mm just short of my record of 145.4mm in 2012 

Dyce recorded 154mm making it one of only 11 December's in the past 160+ years where an Aberdeen station has reached 150mm 

1876 – 238mm at King’s College, Old Aberdeen; 225mm at Bon Accord Street

1929 – 218mm at Craibstone; 196mm at Mannofield Reservoir; 168mm at King’s College, Old Aberdeen

1882 – 185mm at Gordon’s College

1896 – 180mm at King’s College, Old Aberdeen; 174mm at Gordon's College

1915 – 178mm at Cranford House, Mannofield

2012 – 164mm at Dyce

1978 – 160mm at Dyce

1911 – 156mm at Cranford House, Mannofield

2020 – 154mm at Dyce

1919 – 150mm at Cranford House, Mannofield

1945 – 150mm at Mannofield Reservoir (193mm at Braemar)

Most of the wettest Decembers have been over a century ago which is surprising even given the drying trend in winter associated with increased westerlies. This was the first wetter than average December since 2015.

Colder winters have always been wetter due to the tendency for cold snowy northerlies to alternate with much less cold, rainy easterly muck.

However now we are seeing the easterly muck alternate with pitiful NW'lies that produce the exact same rain and non-existent diurnal range 

Annual total finished at 711.6mm just below average which is incredible given that the first five months were the driest on record.

Similar rain pattern to 1896 which had one of the driest starts then a washout second half. Only real difference - the very wet September in 1896 (figures from Gordon's College).

Total rainfall here for December was 104.4mm which is 138% of the LTA. A wet month, especially from the more than 20mm in one day just after Christmas.

Total for the year was 784.8mm (111% of LTA).  So a wetter than average year, despite the agricultural drought in the summer months, when the drying effect of weeks of NE winds in the late Spring reduced soil moisture a great deal.

Of particular note is the fact that of that 784.8mm, 591.0mm (75% of the year's rainfall) came in the 6 months Jan-Mar and Oct-Dec (now known as the Wet Season) and 193.8mm (25% of the year's rainfall) came in the 6 months Apr-Sep (now known as the Dry Season).