JerseyThe weather in August in Saint Helier
It's pleasantly warm in August in Saint Helier with an average temperature of 21°C. Temperatures this month range from a low of 20°C to a high of 22°C. At night, you can expect temperatures between 14°C and 16°C.
Looking for great weather? August is a good time to be in Saint Helier. The temperatures are nice, and there’s not too much rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in August for Saint Helier, Jersey. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 33°C in 2020, Saint Helier reached the highest temperature in August over the past 10 years. The lowest daytime temperature in this month was 15°C in 2017. The extreme nighttime temperatures ranged from a lowest recorded value of 10°C to a highest value of 19°C.
Water temperature
The water temperature at Saint Helier is 18°C this month. You can swim, but it's a bit chilly.
Rainfall amount
In August, there is an average of 37 mm of precipitation, spread over 7 days. The wind speed is around 4 Bft, mostly coming from the Southwest.
Daily weather in August for Saint Helier
Click on any day in August to get detailed info about the usual weather on that day in Saint Helier. Check out the historical temperatures and precipitation over the past 10 years on this day.
August weather comparison
| Saint Helier | New York | |
|---|---|---|
| Average temperature | 21°C | 30°C |
| Max. temperature | 22°C | 31°C |
| Min. temperature | 14°C | -5°C |
| Total precipitation | 37 mm | 79 mm |
| Rainy days | 7 days | 13 days |
Start of August
The month of August starts in Saint Helier with warm temps, averaging around 22°C during the day and nights around 16°C.
Mid August
By mid-August, daytime temps drop to around 21°C, with nights around 16°C. Not much precipitation expected during this period. It’s mostly dry and sunny.
End of August
By the end of August, the average daytime temperature in Saint Helier is around 21°C, while nighttime temps are about 16°C. There’s hardly any chance of precipitation. The weather will be mostly dry with plenty of sun.
UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Check out the climate of Saint Helier for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in August in Saint Helier, Jersey. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in August in Saint Helier
Temperature in August in Saint Helier over the years
Precipitation charts
These charts show the average amount of precipitation in August in Saint Helier, Jersey. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in August in Saint Helier
Total precipitation in August in Saint Helier over the years
Daily UV index in August in Saint Helier
This chart shows the average daily UV index in August in Saint Helier, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in August in Saint Helier
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Average weather in Saint Helier by month
Click on a month below to see detailed weather info for Saint Helier. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.