Air Temperature

Highest Maximum 22.5°C 3rd
Lowest Maximum 12.0°C 29th
Highest Minimum 16.4°C 3rd and 18th 
Lowest Minimum 6.5°C 30th

 

Mean Maximum 17.5°C
Mean Minimum 13.5°C
Mean 15.5°C

 

Relative Humidity

Highest Relative Humidity 100% Several days
Lowest Relative Humidity 54% 28th

 

Mean Relative Humidity 83.5%

 

Atmospheric Pressure

Highest Atmospheric Pressure 1028.9hPa 31st
Lowest Atmospheric Pressure 1000.8hPa 14th

 

Mean Atmospheric Pressure 1017.7hPa

 

Wind

Highest Gust 82.1km/h 14th

 

Mean Wind Speed 14.0km/h
Mean Gust Speed 45.6km/h
Mean Wind + Gust Speed 29.8km/h
Most Frequent Wind Direction Northwest

 

Precipitation

Total Rainfall During December 2019 34.6 mm https://southafrica-ed.com/kamagra-in-south-africa/
Total Rainfall Since Last 01/09 348.3 mm

 

Highest 24 Hour Total 11.0 mm 10th

 

Rain Days 10
Thunderstorm Days 3
Hail Days 4

 

Rainfall Events

09/12/2019 0.2 mm Drizzle
10/12/2019 9.2 mm Rain/Hail Showers
11/12/2019 0.3 mm Drizzle
12/12/2019 11.0 mm Intermittent Rain/Hail
13/12/2019 3.5 mm Isolated Showers
14/12/2019 0.8 mm Drizzle
22/12/2019 1.0 mm Drizzle
23/12/2019 0.3 mm Drizzle
30/12/2019 2.8 mm Rain/Hail Showers
31/12/2019 5.5 mm Rain/Hail Showers

 

December 2019 Compared to the Climate Means 

  Climate Mean December 2019 Anomaly
Mean Maximum Temperature 17.1°C 20.7°C +0.4°C
Mean Minimum Temperature 11.8°C 15.6°C +1.7°C
Mean Temperature 14.5°C 18.2°C +1.0°C
Mean Relative Humidity 79% 71.7% +4.5%
Mean Atmospheric Pressure 1017.3hPa 1012.3hPa +0.4hPa
Mean Wind Speed 18.2 km/h 10.0km/h -4.2km/h
Most Frequent Wind Direction Northwest South 0°
Total Rainfall 109.7 mm 129.3 mm -75.1 mm
Total Rainfall Since Last 01/09 342.1 mm 313.7 mm +6.2 mm
Total Rain Days 14 10 -4
Total Thunderstorm Days 4 3 -1
Total Hail Days 1 4 +3


Warmer and Drier December 2019

Temperatures throughout the last month of 2019 followed the trend set in previous months. Daytime highs exceeded the norm by just less than half a degree. Nighttime lows, on the other hand, were almost a solid 2˚C warmer than average. December 2019 started on a very warm note, with maximum temperatures of around 20˚C throughout the first week. Nighttime lows never dipped below the 16˚C mark for the duration of the first week. A few days with cooler than average temperature values followed. This didn’t last long, however, as warm conditions returned to the Maltese Islands by mid-December. These prevailed till after Christmas, when the first cold snap of winter gripped the central Mediterranean. It was at this time, that the coldest day and night were measured, with temperatures of 12.0˚C and 6.5˚C respectively.

In a stark contrast to the previous autumnal months, December 2019 was very dry. The 34.6 mm accumulated during the month were a full 75 mm short of the climate average. A typical December is the wettest month of the year. This was the result of anticyclonic conditions that prevailed over the central and eastern Mediterranean. These acted as a barrier, deviating the majority of storm systems to the north. The 10 days of rain and 3 days of thunder observed last month less than the average for this time of year. The 4 days of hail exceeded the climate average, however.

Averaging at 14.0 km/h, the wind speed was weaker than the norm. Weaker winds have been a dominant feature of autumn so far. The month’s windiest day was the 14th, when a gust of 82.1 km/h (Force 9) blowing from a Northwest direction was recorded.

Atmospheric pressure conformed with the norm.

Last month’s highlight was a severe Mistral on the 14th. A depression (980hPa) formed over the Gulf of Genoa, and migrated across Italy and into central/southern Adriatic Sea. Simultaneously, a ridge of high pressure developed to its east, over France. The pressure difference generated a severe gale from the Northwest across the central Mediterranean. The depression was derived from one which had produced a windstorm across the British Isles and northwest Europe some days before. This was only the second gale in an otherwise unusually calm autumn. The bulk of last month’s precipitation was produced by this system. The severe gale-force winds and heavy rain from the system caused disruption and some light damage.