May 2018 Weather Round Up

The day-to-day weather has very little impact on the volume of visits to Jersey, but can play a major role in influencing the types of activities that visitors who are here do, and thereby, the amount of money that they spend. Some attractions and activity providers thrive only when the sun shines, others see higher patronage on rainy days.

The following tables show the monthly profile of temperatures, rainfall and sunshine over the past three years, the annual change, and finally the variance to the thirty-year average. When looking at the monthly figures warmer temperatures, drier weather and higher sunshine hours are shaded green, and when looking at comparisons a warmer, drier and sunnier relative outcome is shaded green.


May 2018

The average temperature in May was 14.6oC, which was 0.1oC lower than the year before but 1.1oC above the thirty-year average. Rainfall totalled 26mm for the month, making it the driest month since December 2016, with less than half the seasonal norm of rainfall.

Looking at the number of hours of sunshine we find that the total of 323.7 hours, significantly higher than in May of last year and what one could reasonably expect for the time of year, being the sunniest month for more than four years.

In summary, the May weather was much drier and sunnier than is normal with temperatures close to normal – so particularly favourable for outdoor focussed activities.

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 May there were no days on which no sunshine was recorded. There were fifteen days during May when the sun shone for 12 hours or more. The lowest minimum temperature was around 5oC on the first day of the month. May 7th saw the warmest temperature of the month at 26oC, there were eleven days on which the temperature breached the 20 degree threshold.

There were 22 days on which no recorded rain fell and five days with only trace amounts of around 1mm. The wettest day of the month was 29th May with 12mm.

May weather