Weather in Jersey in September 2025
Average weather
Average temperature in Jersey in September
Going from a maximum of +73°F during the day to a minimum of +55°F during the night, the temperature in September averages around +68°F.
The average maximum temperature goes up 10% by the end of the month, compared with the beginning of the month, from +64°F to +66°F.
Is Jersey warm or cold in September?
Jersey is typically mild in September.
Maximum temperatures go down compared to the previous month from +66°F to +64°F. The minimum temperature also goes down from +59°F to +57°F.
Pack a light jacket as it will be warm in the day and cool in the evenings.
September is one of the warmest months in Jersey, here is the comparison with other months:
Climate in Jersey in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +66°F | +64°F | +59°F | ||||
| Min. temperature | ||||||
| +50°F | +45°F | +39°F | ||||
| Max. temperature | ||||||
| +91°F | +88°F | +73°F | ||||
| Rainfall | ||||||
| 52 mm | 71 mm | 110 mm | ||||
| Wind | ||||||
| 4 m/s | 5 m/s | 5 m/s | ||||
| Humidity | ||||||
| 81% | 80% | 81% | ||||
| Air pressure | ||||||
| 1016 HPa | 1016 HPa | 1014 HPa | ||||
| Sunny days | ||||||
| 5 | 4 | 2 | ||||
| Cloudy days | ||||||
| 11 | 10 | 9 | ||||
| Rainy days | ||||||
| 14 | 14 | 19 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as ok as in August. It’s getting colder in September. From +66°F in the day, the average maximum temperature lowers to +64°F. Prepare for more rain. Average rainfall goes from 52 mm to 71 mm. It feels drier, as humidity decreases from 81% to 80%. Winds are stronger in comparison to August, going up from 4 m/s to 5 m/s on average. The days becoming less sunny, going from 5 sunny days in August to 4 in September.
October brings much the same weather, it remains ok.
Wind
The average wind speed is 4 m/s getting up to 8 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Jersey is gradually increasing during September, going from 3 m/s to 3 m/s over the course of the month.
Rain
How was the weather last September in Jersey?
Climate Change Over the Years
The climate in Jersey in September has not changed that much over the last 43 years.
The average temperature was the lowest in 1979 (+53°F) and the highest in 2020 (+59°F). The driest year was 1989 with only 603 mm of rainfall, and the wettest year was 2020 with 1376 mm.
FAQ
Is September a good time to visit Jersey?
Can you sunbathe in Jersey in September?
Is Jersey rainy in September?
Is it sunny in Jersey in September?
Monthly weather in Jersey
Source of the data
For this page, we’ve looked at the typical weather in Jersey, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.