Weather in Jersey for September 2025
Until now, September 2025 in Jersey is slightly cooler than the historical average by -1.1 °C.
Expect cooler weather in the next days in Jersey with the forecast suggesting a temperature of 16.9 °C, lower than the historical average.
In general, the average temperature in Jersey at the beginning of September is 19.3 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 16.7 °C by the end of September.
Jersey in September brings notable rainfall, with an average of 19 rainy days and a total precipitation of 92.1 mm.
Temperatures
Rain 🌧️
Jersey Weather September
Temperatures trend during September in Jersey
September weather in Jersey day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain shower | 18° /17° | 10.9 mm | 4 | |
| 2 Sept. |  Partly cloudy | 19° /16° | 5.3 mm | 4 | |
| 3 Sept. | Light rain shower | 20° /17° | 1.6 mm | 5 | |
| 4 Sept. |  Sunny | 19° /17° | 1.2 mm | 5 | |
| 5 Sept. | Sunny | 19° /16° | 1.7 mm | 5 | |
| 6 Sept. | Partly cloudy | 20° /17° | 0 mm | 5 | |
| 7 Sept. | Light rain shower | 20° /17° | 3.9 mm | 5 | |
| 8 Sept. | Partly cloudy | 18° /16° | 4 mm | 5 | |
| 9 Sept. | Patchy rain possible | 20° /16° | 2 mm | 4 | |
| 10 Sept. |  Patchy light rain with thunder | 18° /16° | 6.5 mm | 4 | |
| 11 Sept. | Light rain shower | 17° /15° | 2.1 mm | 4 | |
| 12 Sept. | Partly cloudy | 17° /15° | 3.4 mm | 4 | |
| 13 Sept. |  Overcast | 17° /15° | 1 mm | 4 | |
| 14 Sept. | Sunny | 18° /15° | 0.4 mm | 5 | |
| 15 Sept. | Sunny | 19° /15° | 0.4 mm | 5 | |
| 16 Sept. | Patchy rain possible | 19° /17° | 0.7 mm | 5 | |
| 17 Sept. | Partly cloudy | 19° /16° | 0 mm | 1.2 | |
| 18 Sept. | Partly cloudy | 19° /17° | 0.1 mm | 1.1 | |
| 19 Sept. | Sunny | 20° /18° | 0 mm | 1 | |
| 20 Sept. | Patchy rain possible | 19° /15° | 0.5 mm | 0.2 | |
| 21 Sept. | Patchy rain possible | 15° /14° | 0.4 mm | 3 | |
| 22 Sept. | Patchy rain possible | 14° /13° | 1 mm | 3 | |
| 23 Sept. | Patchy rain possible | 15° /13° | 0.1 mm | 3 | |
| 24 Sept. | Patchy rain possible | 16° /13° | 3.3 mm | 3 | |
| 25 Sept. | Patchy rain possible | 16° /15° | 0.3 mm | 4 | |
| 26 Sept. | Sunny | 16° /14° | 0.1 mm | 4 | |
| 27 Sept. | Sunny | 16° /14° | 0 mm | 5 | |
| 28 Sept. | Partly cloudy | 17° /15° | 0 mm | 5 | |
| 29 Sept. | Sunny | 18° /15° | 0 mm | 5 | |
| 30 Sept. | Sunny | 18° /15° | 1.9 mm | 5 | |
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Guide for Jersey in September
In September, Jersey experiences a transition from late summer to early autumn, bringing about noticeable changes in the weather. At the beginning of the month, Jersey typically enjoys mild and pleasant conditions with average temperatures around 17° and occasional sunny spells.
However, as the month progresses, the weather gradually becomes cooler and more unpredictable. By the end of September, temperatures tend to drop to around 14° with an increased chance of rain showers and overcast skies.
The island's coastal location means that it can be influenced by the surrounding sea temperatures, which can moderate the weather conditions. Additionally, September marks the end of the peak tourist season, so visitors can expect fewer crowds and a more relaxed atmosphere.
It's important to note that Jersey's weather in September can be quite changeable, so it's advisable for travelers to pack layers and be prepared for varying conditions.
Overall, September offers a mix of late summer warmth and early autumnal chill, making it a unique time to explore the island's natural beauty and charming attractions.
Jersey in September - FAQ
September rainfall patterns in Jersey
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