September 2019 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 few 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.

September Weather

September 2019

September was wetter, although also a bit sunnier, than is typically the case.

September was a relatively wet month with 77.2mm of rain, 41.6mm more rain than last September and 14.5mm more than the 30-year average. We saw 201.4 hours of sunshine, 42.4 hours less than last September. However, September 2018 was sunnier than is usual for this time or year, so looking at the 30-year average, September 2019 still saw 8.9 hours more sunshine than is typical for this time of year.

The average temperature in September was 16.7°C, which is very similar to last September and the thirty-year average (16.8 and 16.5 respectively).

There was only one day without any recorded sunshine. There was recorded rainfall on 60% of September days with the wettest day being the 23 September with 13mm of rain. The lowest minimum temperature was around 10°C on the 02, 06 and 09 of the month, while the warmest temperature was around 25°C on 01 September

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.

September 2019 Weather Data