Weather in Jersey in August 2025
- August is usually the hottest month of the year in Jersey;
Average weather
Average temperature in Jersey in August
Going from a maximum of +22°C during the day to a minimum of +15°C during the night, the temperature in August averages around +18°C.
The average maximum temperature goes up 14% by the end of the month, compared with the beginning of the month, from +18°C to +19°C.
Is Jersey warm or cold in August?
Jersey is typically mild in August.
Maximum temperatures go up compared to the previous month from +19°C to +19°C. The minimum temperature also goes up from +15°C to +15°C.
Pack a light jacket as it will be warm in the day and cool in the evenings.
August is the hottest month in Jersey, here is the comparison with other months:
Climate in Jersey in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +19°C | +19°C | +18°C | ||||
| Min. temperature | ||||||
| +11°C | +10°C | +7°C | ||||
| Max. temperature | ||||||
| +35°C | +33°C | +31°C | ||||
| Rainfall | ||||||
| 40 mm | 52 mm | 71 mm | ||||
| Wind | ||||||
| 4 m/s | 4 m/s | 5 m/s | ||||
| Humidity | ||||||
| 81% | 81% | 80% | ||||
| Air pressure | ||||||
| 1016 HPa | 1016 HPa | 1016 HPa | ||||
| Sunny days | ||||||
| 6 | 5 | 4 | ||||
| Cloudy days | ||||||
| 11 | 11 | 10 | ||||
| Rainy days | ||||||
| 12 | 14 | 14 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as ok as in July. The temperature levels stay the same in the area of +19°C for average maximum temperature during the day. Prepare for more rain. Average rainfall goes from 40 mm to 52 mm. Humidity levels don’t change as the month goes on, averaging around 81%. The average wind speed doesn’t change much during August, staying around 4 m/s. The days becoming less sunny, going from 6 sunny days in July to 5 in August.
September brings much the same weather, it remains ok.
Wind
The average wind speed is 4 m/s getting up to 11 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 decreasing during August, going from 7 m/s to 5 m/s over the course of the month.
Rain
How was the weather last August in Jersey?
Climate Change over Years
The climate in Jersey in August has not changed much over the last 43 years.
The average temperature was the lowest in 1979 (+12°C) and the highest in 2020 (+15°C). The driest year was 1989 with only 603 mm of rainfall, and the wettest year was 2020 with 1376 mm.
FAQ
Is August a good time to visit Jersey?
Can you sunbathe in Jersey in August?
Is Jersey rainy in August?
Is it sunny in Jersey in August?
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.