Air Temperature

Highest Maximum 33.9°C 7th
Lowest Maximum 24.6°C 17th
Highest Minimum 26.9°C 4th
Lowest Minimum 17.7°C 21st

 

Mean Maximum 28.5°C
Mean Minimum 21.8°C
Mean 25.1°C

 

Relative Humidity

Highest Relative Humidity 95% Numerous days
Lowest Relative Humidity 46% 15th

 

Mean Relative Humidity 78.9%

 

Wind

Highest Gust 45.1km/h 14th

 

Mean Wind Speed 9.8km/h
Most Frequent Wind Direction South Southeast

 

Atmospheric Pressure

Highest Atmospheric Pressure 1021.7hPa 30th
Lowest Atmospheric Pressure 1007.8hPa 9th

 

Mean Atmospheric Pressure 1015.1hPa

 

Precipitation

Total Rainfall During September 2024 29.7 mm
Total Rainfall Since Last 01/09 29.7 mm

 

Highest 24 Hour Total 9.1 mm 20th

 

Rain Days 11 days
Thunderstorm Days 2 days
Hail Days 1 day

 

Rainfall Events

09/09/2024 3.8 mm Isolated Showers
13/09/2024 2.5 mm Light Rain
17/09/2024 4.0 mm Light Ran
18/09/2024 0.8 mm Light Rain; Distant Thunder
19/09/2024 0.0 mm Distant P.M. Downpour
20/09/2024 9.1 mm Showers; Distant Thunderstorm with Hail
21/09/2024 0.5 mm Light Rain
23/09/2024 7.6 mm Showers
24/09/2024 0.3 mm Light Rain
25/09/2024 0.8 mm Light Rain
26/09/2024 0.3 mm Light Rain

 

September 2024 Compared to the Climate Means

  Climate Mean September 2024 Anomaly
Mean Maximum Temperature 28.5°C 28.5°C  /
Mean Minimum Temperature 21.6°C 21.8°C +0.2°C
Mean Temperature 25.0°C 25.1°C +0.1°C
Mean Relative Humidity 76.6% 78.9% +2.3%
Mean Atmospheric Pressure 1016.7hPa 1015.1hPa -1.6hPa
Total Rainfall 54.9 mm 29.7 mm -25.2 mm
Total Rainfall Since Last 01/09 54.9 mm 29.7 mm -25.2 mm
Total Rain Days 5 days 11 days +6 days
Total Thunderstorm Days 3 days 2 days -1 day
Total Hail Days 0 days 1 day +1 day

 

A Stifling Start to September 2024

Meteorological autumn kicked off on a stifling note. Hot temperatures coupled with very high levels of humidity and a sticky southerly wind made conditions across the Maltese Islands very uncomfortable. With temperatures at approximately 33°C and relative humidity levels consistently around 85%, real-feels were pushed into the mid to upper 40s. With a maximum temperature of 33.9°C, the 7th was last months warmest day. With a minimum temperature of 26.9°C, the night between the 3rd and 4th was the year’s warmest. A cold front traversed the central Mediterranean in the early hours of the 9th, bringing with it cooler temperatures and also the first autumn showers. This proved a turning point in meteorological conditions locally, as it was followed by consistent outbreaks of instability.

Successive episodes of strong North-westerly winds from the 9th onward maintained fresh air across the central Mediterranean. A maximum wind gust of 45.1km/h was measured on the 14th, during one of 6 such breezy episodes.

These outbreaks of instability brought a series of showers, some of which included localized thunderstorms, to the central Mediterranean. Whilst most localities experienced moderate showers, a handful were affected by downpours. These were mainly the harbour regions and localities of central Malta. There were 11 days of rain. Thunder was heard on 2 of these. Hail was recorded on 1. 29.7 mm of rain was measured by our weather station in Għarb. This was just over half of the climate norm. September, however, is naturally a hit-or-miss month. The lack, or abundance, of rainfall is rarely an indicator for the rain season ahead. Localities across harder-hit areas measured in excess of 60 mm of precipitation. The wettest, Msida, recorded 90.5 mm. The heaviest rainfall event occurred on the 20th in the form of a downpour.

Rainfall Totals around the Maltese Islands in September 2024 (and since last September 1st):

Għarb: 29.7 mm (29.7 mm)

Victoria: 34.4 mm (34.4 mm)

Xewkija: 24.3 mm (24.3 mm)

Nadur: 31.8 mm (31.8 mm)

Marsalforn: 26.7 mm (26.7 mm)

Mellieħa: 41.8 mm (41.8 mm)

Buġibba: 51.6 mm (51.6 mm)

Mġarr: 25.2 mm (25.2 mm)

Naxxar: 66.6 mm (66.6 mm)

Mosta: 64.8 mm (64.8 mm)

Dingli: 28.0 mm (28.0 mm)

Msida: 90.5 mm (90.5 mm)

Valletta: 64.7 mm (64.7 mm)

Imqabba: 36.7 mm (36.7 mm)

Birżebbuġa: 30.9 mm (30.9 mm)

Sliema: 62.5 mm (62.5 mm)

Fgura: 83.0 mm (83.0 mm)

NATIONAL MEAN: 46.7 mm (46.7 mm)