June Weather Round-up

The average temperature in June was 16.9oC, which was 1.1oC cooler than the year before but 0.8oC above the thirty-year average.  Rainfall totalled 41mm for the month, almost identical to June of 2017 with 7mm less rainfall than the seasonal norm.    

Looking at the number of hours of sunshine we find that the total of 268 hours, some 28 hours fewer than was recorded twelve months previously but 11 hours ahead of what is typical for the time of year.

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In summary, the June weather was very close to the thirty-year average when focussing just on the aggregate statistics, indicating that the weather ought not to have had a distorting impact on visitor behaviour.

Averages can be misleading – you can have many values that are a bit below normal being offset by a single value that is significantly above normal. In meteorological terms for example you could have a month during which 28 days see not a drop of rain, but three days of torrential downpours.  Statistically this might lead to an ‘average’ amount of rainfall for the month, but most visitors would not have experienced ‘average’ weather.

Looking at June there were just two days on which no sunshine was recorded and two more days with less than one hour of sunshine. There were thirteen days during June when the sun shone for 12 hours or more.  The lowest minimum temperature was around 10oC on 22 June.  26 June saw the warmest temperature of the month at 25oC, there were sixteen days on which the temperature breached the 20 degree threshold. Other parts of the British Isles (England, Scotland, Wales, Northern Ireland and the Republic of Ireland) saw June maximums some five degrees higher than Jersey.

There were 19 days on which no recorded rain fell and six days with only trace amounts of around 1mm.  The wettest day of the month was 08 June with 25mm.

June Weather Data