JerseyThe weather in May in Saint Helier
It's cool to moderate in May in Saint Helier with an average temperature of 16°C. Temperatures this month range from a low of 13°C to a high of 19°C. At night, you can expect temperatures between 8°C and 13°C.
Looking for sun and warm weather? May isn’t a good month to be in Saint Helier. The temperatures are too low for a warm stay this month.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in May 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 28°C in 2017, Saint Helier reached the highest temperature in May over the past 10 years. The lowest daytime temperature in this month was 9°C in 2021. The extreme nighttime temperatures ranged from a lowest recorded value of 4°C to a highest value of 16°C.
Water temperature
The water temperature at Saint Helier is 12°C this month. This is too cold to swim without protective gear.
Rainfall amount
In May, there is an average of 29 mm of precipitation, spread over 7 days. The wind speed is around 4 Bft, mostly coming from the South.
Daily weather in May for Saint Helier
Click on any day in May 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.
May weather comparison
| Saint Helier | New York | |
|---|---|---|
| Average temperature | 16°C | 22°C |
| Max. temperature | 19°C | 28°C |
| Min. temperature | 8°C | -5°C |
| Total precipitation | 29 mm | 105 mm |
| Rainy days | 7 days | 14 days |
Start of May
The month of May starts in Saint Helier with cool temps, averaging around 16°C during the day and nights around 10°C.
Mid May
By mid-May, daytime temps stay steady at around 16°C, with nights around 11°C. Not much precipitation expected during this period. It’s mostly dry and sunny.
End of May
By the end of May, the average daytime temperature in Saint Helier is around 18°C, while nighttime temps are about 12°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 9 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 May 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 May in Saint Helier
Temperature in May in Saint Helier over the years
Precipitation charts
These charts show the average amount of precipitation in May 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 May in Saint Helier
Total precipitation in May in Saint Helier over the years
Daily UV index in May in Saint Helier
This chart shows the average daily UV index in May 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 May 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.