Air Temperature

Highest Maximum 24°C 11th, 24th, 25th and 29th
Lowest Maximum 18°C 6th, 7th and 16th
Highest Minimum 17°C 26th, 28th and 29th
Lowest Minimum 12°C 3rd, 8th and 17th

 

Mean Maximum 21.0°C
Mean Minimum 14.0°C
Mean 17.5°C

 

Relative Humidity

Highest Relative Humidity 73% 2nd and 3rd
Lowest Relative Humidity 29% 22nd

 

Mean Relative Humidity 61.0%

 

Atmospheric Pressure

Highest Atmospheric Pressure 1022.0hPa 30th
Lowest Atmospheric Pressure 1000.0hPa 4th

 

Mean Atmospheric Pressure 1014.0hPa

 

Wind

Highest Gust 68km/h 6th

 

Mean Wind Speed 12km/h
Mean Gust Speed 30km/h
Mean Wind + Gust Speed 21.5km/h
Most Frequent Wind Direction Northwest

 

Precipitation

Total Rainfall During May 2019 21.1 mm
Total Rainfall Since Last 01/09 503.7 mm

 

Highest 24 Hour Total 7.8 mm 3rd

 

Rain Days 8
Thunderstorm Days 4
Hail Days 0

 

Rainfall Events

03/05/2019 7.8 mm Showers
04/05/2019 0.5 mm Thunderstorm
12/05/2019 2.5 mm Thunderstorm
13/05/2019 0.3 mm Light Rain
14/05/2019 2.3 mm Light Rain
16/05/2019 5.6 mm Thunderstorm
26/05/2019 1.8 mm Thunderstorm
30/05/2019 0.3 mm Light Rain

 

May 2019 Compared to the Climate Means 

  Climate Mean May 2019 Anomaly
Mean Maximum Temperature 23.9°C 21.0°C -2.9°C
Mean Minimum Temperature 15.7°C 14.0°C -1.7°C
Mean Temperature 19.8°C 17.5°C -2.3°C
Mean Relative Humidity 74% 61% -13%
Mean Atmospheric Pressure 1015.3hPa 1014.0hPa +1.3hPa
Mean Wind Speed 17.0 km/h 21.5km/h +4.5km/h
Most Frequent Wind Direction Northwest Northwest Nil
Total Rainfall 10.6 mm 21.1 mm +10.5 mm
Total Rainfall Since Last 01/09 572.3 mm 503.7 mm -68.6 mm
Total Rain Days 3 5 +2
Total Thunderstorm Days 1 2 +1
Total Hail Days 0 0 0


Cooler and Wetter in May 2019

May 2019 was rather cool, as below-average temperatures were recorded throughout. The mean maximum temperature of 23.9°C was exceeded on only 4 days out of 31 days. Overall, the air temperature was 2.3°C colder than the norm. Once again, the biggest margin from the mean was registered by the daytime highs. May 2019 was infact one of the coldest ever. Unseasonal anticyclones over Scandinavia persisted throughout the month. This deflected bad weather towards the Mediterranean. This bad weather brought with it frequent blasts of cold air from the north, allowing temperatures to remain colder than average throughout.

Total rainfall measured at our weather station in Għarb, at 21.1 mm was above the mean for this time of year. The number of days with rain and thunderstorms, at 8 and 4 respectively, were also greater than the norm. This observation is also the result of prevailing anticyclones over Scandinavia, deviating bad weather to the south.

A number of windy days dotted May. Winds were significantly stronger than the average for May. The wind reached Force 6 or higher on 6 days. This was the consequence of air moving from high pressure over Scandinavia towards successive low pressure systems traversing the Mediterranean. The prevailing wind direction was the Northwest. The strongest wind gust was of 68 km/h, registered on the 6th.