December 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 and others tend to see higher numbers of admissions on rainy days.

The below 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.

Couple on beach

December Weather

Average Temperature

The average temperature in December 2019 was 8.6°C, which is fairly typical for this time of year, at 0.6°C cooler than December 2018 but 1.3°C warmer than the 30-year average for December.

The highest temperature recorded was just under 13°C on 13 and 19 December and the lowest temperature recorded was just above 0°C on 05 December.

Total Rainfall

December 2019 had 123mm of recorded rainfall. This was not as wet as October and November which both saw very high levels of rainfall. However, it was 13.9mm more rain than December 2018 and 9.3mm more than the 30-year average for December.

The wettest day was 16 December with 17mm of rain.

There were only seven days during the month with no recorded rainfall.

There were 16 days with at least 2mm of rain and of these days, three days had 10mm or more of rain. 

Sunshine Hours

We had quite a sunny December with 92.6 hours of sunshine during the month, which is 42.2 hours more sunshine than December 2018 and 25.4 hours more sunshine than the 30-year average. This is the sunniest December since December 2016 which saw 98.7 hours of sunshine.

There were six days with no recorded sunshine at all and a further eight days with less than two hours of sunshine.

The sunniest day was 03 December with just under eight hours of sunshine.

There were seven days with six or more hours of sunshine.

(Please note that 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).

December Weather Data