Benmore Botanic Garden weather summary
December 2018 Highest max air temp: 12.5ºC on the 28th Lowest max air temp: 2.0ºC on the 24th Average max air temp: 7.9ºC Lowest min air temp: -1.7ºC on the 24th Highest min air temp: 9.0ºC on the 31st Average min air temp: 2.9ºC Highest min at grass level: 8.0ºC on the 31st Lowest min at grass level: 4ºC on the 4th Average min at grass level: 0.6ºC Air min below 0.0ºC on 4 days Grass level min below 0.0ºC on 14 days Hail on 1 day Snow/sleet on 2 days Thunder on 0 days Gale on 0 days Greatest rainfall in one day: 34.6mm on the 7th Rain 0.2mm or more on 30 days Rain 1.0mm or more on 25 days Rain 5.0mm or more on 16 days Trace (between 0.0mm & 0.1mm): 0 days Total with measurable rain: 31 days Average relative humidity: 90.9% Total rainfall for month: 314.8mm (12.4 inches) Total rainfall for a year: 2403.3mm (94.6 inches) December was fairly mild with the occurrence of air frost being down by 60% and ground frost down by 22%.
The average maximum daily air temperature was up by 0.7ºC and the minimum by 1.1ºC.
Rainfall was around average for the time of year but with precipitation recorded on every day it was the most humid month of the year. Year 2018 Temperatures Highest max air temp: 30.9°C on June 28 Lowest max air temp: -1.0ºC on January 7 Highest min air temp: 16.1°C on July 23 Lowest min air temp: -6.4ºC on January 8 Highest min temp at grass level: 16.1°C on August 3 Lowest min temp at grass level: -13.0ºC on January 8 Frost Air frost on 53 days Last air frost on May 1 First air frost on October 16 Between last and first air frost: 167 days Ground frost on 122 days Last ground frost on June 13 First ground frost on July 7 Between last and first ground frost: ground frost was recorded in every month Rainfall Total rainfall for year: 2403.3mm (94.6 inches) Greatest rainfall in one day 55.6mm on October 8 0.2mm or more on 260 days 1.0mm or more on 221 days 5.0mm or more on 142 days Measurable rain on 283 days Average relative humidity 83.6% Other phenomena Gales on 3 days Hail on 9 days Snow or sleet on 21 days Thunder on 4 days On the face of it 2018 was an average year weather-wise at Benmore but delving further into the detail reveals a more complicated set of circumstances. Total precipitation for 2018 fell almost exactly on the long-term average of 2397.0mm (being only 6.3mm above this). This does not show the whole picture, however, with January being particularly wet and the period September to December experiencing above average rainfall. The months of February, March, May, June and July all recorded below average precipitation with July showing the largest aberration with rainfall down by 35%.
Benmore Botanic Garden.