Air Temperature

Highest Maximum 25.4°C 29th
Lowest Maximum 14.7°C 5th
Highest Minimum 16.4°C 29th 
Lowest Minimum 8.3°C 9th

 

Mean Maximum 18.9°C
Mean Minimum 13.1°C
Mean 16.0°C

 

Relative Humidity

Highest Relative Humidity 95%  30th
Lowest Relative Humidity 40% 30th

 

Mean Relative Humidity 75.3%

 

Atmospheric Pressure

Highest Atmospheric Pressure 1029.8hPa 9th
Lowest Atmospheric Pressure 1005.6hPa 27th

 

Mean Atmospheric Pressure 1016.4hPa

 

Wind

Highest Gust 72.4km/h schweiz-libido.com 16th

 

Mean Wind Speed 11.4km/h
Mean Gust Speed 20.5km/h
Mean Wind + Gust Speed 15.9km/h
Most Frequent Wind Direction East Southeast

 

Precipitation

Total Rainfall During April 2021 1.4 mm
Total Rainfall Since Last 01/09 414.7 mm

 

Highest 24 Hour Total 1.4 mm 5th 

 

Rain Days 1
Thunderstorm Days 0
Hail Days 0

 

Rainfall Events

 

05/04/2021 1.4 mm Isolated Shower

 

April 2021 Compared to the Climate Means

  Climate Mean April 2021 Anomaly
Mean Maximum Temperature 19.4°C 18.9°C -0.5°C
Mean Minimum Temperature 12.8°C 13.1°C +0.3°C
Mean Temperature 16.1°C 15.9°C -0.2°C
Mean Relative Humidity 77% 75.3% -1.7%
Mean Atmospheric Pressure 1014.3hPa 1016.4hPa +2.1hPa
Mean Wind Speed 18.9 km/h 15.9 km/h -3.0 km/h
Most Frequent Wind Direction Northwest East Southeast
Total Rainfall 20.9 mm 1.4 mm -19.5 mm
Total Rainfall Since Last 01/09 533.7 mm 414.7 mm -119.0 mm
Total Rain Days 5 days 1 day -4 days
Total Thunderstorm Days 1 day 0 days -1 day
Total Hail Days 1 day 0 days -1 day

 

Almost Completely Dry in April 2021

April 2021 was another month with temperatures around the average. Overall, temperatures were marginally below the mean for the time of year. Days were slightly cooler, while nights were a bit warmer. This was the result of persistent anticyclones over Europe directing colder air from the north towards the central Mediterranean. A brief cool spell towards the start of the month registered April’s lowest temperature readings. With a nighttime low of 8.3°C, the morning of the 9th was the coolest last month. The warmest day in April 2021 was the 29th. A daytime high of 25.4°C was registered on the day, as a warm stream of air from the Sahara blew across the central Mediterranean.

An isolated shower on the 5th brought last month’s only measurable rain. With the exception of a few drops of dusty rain on a few days, April 2021 was otherwise completely dry. Although spring is synonymous with frequent days of grey skies and airborne fine dust, last month did exceed expectation.

With regards to wind, April 2021 featured dominant southerly winds. The most frequent wind direction last month was the East Southeast. Half of the days in April 2021 were characterized by winds blowing from the southern quadrant. April 2021 lived up to its expectation of being a wind-swept month. Gusts of at least Force 6 were recorded on a staggering 16 days, the highest of which was one of 72.4km/h (Force 8), measured on the 16th. This was during the passage of a north African low. Accompanying most windy days were grey skies and airborne fine dust.