September weather forecast
Jersey

September in Jersey signifies the arrival of autumn, with the weather gradually transitioning from the warmth of summer to the cooler conditions of the upcoming season. Average temperatures typically range from 14°C (57.2°F) to 18°C (64.4°F), marking a decrease from the summer highs but still maintaining a comfortable warmth, especially in the early part of the month.

In St. Helier, as well as the rest of Jersey, September temperatures usually represent a balanced mix of the departing summer warmth and the incoming autumn coolness. The island's small size ensures that there are no significant variations in weather conditions between different regions.

In terms of precipitation, September experiences a slight increase compared to August, with the island receiving around 70mm (2.76") of rain, typically spread over about 13 days. This marks the beginning of the wetter autumn season, although there are still many dry and sunny days to enjoy.

One noticeable change in September is the decrease in daylight hours. As the autumn equinox approaches, the length of daylight reduces to about 12 to 13 hours per day by the end of the month. However, the ample sunlight still provides enough daylight for a range of outdoor activities.

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• Saint Helier - September »
  In Saint Helier during September, the rain falls for 13.3 days and regularly aggregates up to 31mm (1.22") of precipitation. In Saint Helier, in September, during 13.3 rainfall days, 31mm (1.22") of precipitation is typically accumulated.
• Saint Aubin - September »
  In September, Saint Aubin, Jersey witnesses a transition sweeping into autumn, with a subsequent decrease in temperatures relative to August. In the transition from August to September, Saint Aubin reports an average high-temperature of a still refreshing 17.4°C (63.3°F), indicating a close resemblance to the prior month.
• Gorey - September »
  September in Gorey, Jersey marks the onset of autumn, though with a gentle descent in temperatures to an average daytime high of 15.5°C (59.9°F). The commencement of September in Gorey notes an average high-temperature of a still comfortable 17.5°C (63.5°F), exhibiting little difference from the previous month.
• Six Rues - September »
  In Six Rues in September, it is raining for 13.4 days, with typically 29mm (1.14") of accumulated precipitation. On the first day of September in Six Rues, sunrise is at 06:25 and sunset at 19:51.
• Rozel - September »
  In Rozel during September, the rain falls for 13.3 days and regularly aggregates up to 31mm (1.22") of precipitation. The months with the highest UV index in Rozel are June through September, with an average maximum UV index of 5.
• Portinfer - September »
  In Portinfer during September, the rain falls for 13.4 days and regularly aggregates up to 29mm (1.14") of precipitation. On the first day of September in Portinfer, sunrise is at 06:25 and sunset at 19:51.
• Millbrook - September »
  In Millbrook in September, during 13.3 rainfall days, 31mm (1.22") of precipitation is typically accumulated. Millbrook greets September with an average high-temperature of a still comfortable 17.5°C (63.5°F), marking a slight deviation from the preceding month.
• Les Creux - September »
  September weather in Les Creux starts showing signs of autumn with temperatures tracing back between 15.6°C (60.1°F) and 17.4°C (63.3°F). On the first day of September in Les Creux sunrise is at 06:25 and sunset at 19:51.
• Le Rondin - September »
  In Le Rondin during September, the rain falls for 13.4 days and regularly aggregates up to 29mm (1.14") of precipitation. The month of September in Le Rondin, Jersey, is marked by an average minimum temperature of 15.6°C (60.1°F), slightly cooler than its daytime counterpart.
• La Moye - September »
  In La Moye, Jersey, in September, during 13.4 rainfall days, 29mm (1.14") of precipitation is typically accumulated. On the first day of September in La Moye, sunrise is at 06:26 and sunset at 19:51.
• La Hougue - September »
  On the first day of September in La Hougue sunrise is at 06:25 and sunset at 19:51. In La Hougue, Jersey, in September, during 13.4 rainfall days, 29mm (1.14") of precipitation is typically accumulated.