Air Temperature

Highest Maximum 29.9°C 3rd
Lowest Maximum 25.7°C 10th
Highest Minimum 24.5°C 1st
Lowest Minimum 18.6°C 11th

 

Mean Maximum 28.7°C
Mean Minimum 22.3°C
Mean 25.5°C

 

Relative Humidity

Highest Relative Humidity 72% Several days
Lowest Relative Humidity 40% 13th

 

Mean Relative Humidity 62.4%

 

Atmospheric Pressure

Highest Atmospheric Pressure 1025.2hPa 12th
Lowest Atmospheric Pressure 1009.8hPa 10th

 

Mean Atmospheric Pressure 1017.3hPa

 

Wind

Highest Gust 48.3km/h 7th

 

Mean Wind Speed 8.2km/h
Mean Gust Speed 29.7km/h
Mean Wind + Gust Speed 19.0km/h
Most Frequent Wind Direction Northwest

 

Precipitation

Total Rainfall During September 2019 78.4 mm
Total Rainfall Since Last 01/09 78.4 mm

 

Highest 24 Hour Total 44.7 mm 10th

 

Rain Days 8
Thunderstorm Days 4
Hail Days 1

 

Rainfall Events

01/09/2019 1.0 mm Light Rain
02/09/2019 17.9 mm Thunderstorm
04/09/2019 6.7 mm Thunderstorm
05/09/2019 0.5 mm Light Rain; Distant Thunder
09/09/2019 1.5 mm Isolated Shower
10/09/2019 44.7 mm Thunderstorm with Hail
11/09/2019 5.4 mm Isolated Showers
22/09/2019 0.7 mm Light Rain

 

September 2019 Compared to the Climate Means 

  Climate Mean September 2019 Anomaly
Mean Maximum Temperature 28.3°C 28.7°C +0.4°C
Mean Minimum Temperature 20.8°C 22.3°C +1.5°C
Mean Temperature 24.6°C 25.5°C +0.9°C
Mean Relative Humidity 77% ed-hrvatski.com 62.4% -14.6%
Mean Atmospheric Pressure 1017.4hPa 1017.3hPa -0.1hPa
Mean Wind Speed 13.7 km/h 19.0km/h +5.3km/h
Most Frequent Wind Direction Northwest Northwest 0°
Total Rainfall 55.5 mm 78.4 mm +22.9 mm
Total Rainfall Since Last 01/09 55.5 mm 78.4 mm +22.9 mm
Total Rain Days 4 8 +4
Total Thunderstorm Days 3 4 +1
Total Hail Days 1 1 0


Warmer but Wetter September 2019

A warmer than average September brought summer 2019 to a close. The mean temperature was calculated at 25.5°C, 0.9°C higher than the climate norm. Nights were particularly warm. Temperatures were consistent throughout September, with no extreme values. The warmest day was the 3rd with a high of 29.9°C. The coolest temperature was recorded at 18.6°C, during a thunderstorm on the 11th.

September 2019 produced 78.4 mm of precipitation at our weather station in Għarb. The first half of the month was especially wet, with 99% of the month’s rainfall falling during the initial two weeks. The second half of the month was practically completely dry. The highest 24 hour rainfall was measured at 44.7 mm on the 10th, during a heavy thunderstorm. Another notable rainfall event this month was a thunderstorm on the 2nd. The striking feature in this particular storm was the incessant lightning that affected the Maltese Islands, particularly Gozo. There were 8 days of rain in September 2019. 4 of these were accompanied by thunder. Some hail was observed on 1 of these.

Humidity was also low when compared to the norm. This was due to the higher than average temperatures. Another contributing factor was the plentiful sunshine that characterized the final two weeks of September 2019.

Atmospheric pressure was in line with the norm. A relatively stable second half of the month compensated for the instability experienced in the first half of September 2019.

The wind was stronger than usual. Despite this, no extremes were measured. The strongest gust was measured at only 48.3 km/h from the Northwest on the 7th.