Annual average weather for Channel Islands

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Annual Average Weather for Channel Islands

The annual average maximum daily temperature is 13.9°C (57.0°F) which is too cold for sunbathing. The annual average water temperature is typically 13.5°C (56.3°F) which is cold for swimming, a full wet suit is required to spend any length of time in the sea. Annually there are on average 16.6 days of rain per month and 5.2 hours of sun per day.

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When is the best time to visit Channel Islands?

The best months to visit Channel Islands are June, July, August, September, for the best beach weather, the most sunshine and optimal sunbathing and swimming conditions with the least chance of rain.

The sea is best for swimming between June and November when the sea temperature is above the average 14°C (56°F) which is cold for swimming, a full wet suit is required to spend any length of time in the sea.

Can you sunbathe in Channel Islands year round?

No, you can't sunbathe in Channel Islands all year round. Some months are too cold for sunbathing, however you might enjoy other beach activities such as taking a walk, going hiking along trails or just enjoying the scenery.

Even during the warmest month, sunbathing may not be ideal as temperatures don't reach 20°C (72°F). The warmest month in Channel Islands is July when the average maximum temperature is 20°C (68°F), average temperature is 17°C (62°F) and average minimum temperature is 14°C (57°F).

More info about the annual temperatures and sunshine.

Can you swim in Channel Islands year round?

No, you can't swim in Channel Islands all year round.

The warmest sea water temperatures in Channel Islands are found in August when they peak at 18°C (65°F) and lowest in March when they dip to 9°C (47°F).

The sea temperature is above average for swimming between June and November when the sea temperature is above 14°C (56°F) which is cold for swimming, a full wet suit is required to spend any length of time in the sea.

More info about the annual sea temperatures

When is the hottest month in Channel Islands?

The hottest month in Channel Islands is July when the average maximum temperature is not that warm but sunbathing may be possible on some clear days 20°C (68°F), average temperature is 17°C (62°F) and average minimum temperature is 14°C (57°F).

More info about the annual temperatures and sunshine.

When is the coldest month in Channel Islands?

The coolest month in Channel Islands is February when the average maximum temperature is 8°C (47°F), average temperature is 6°C (44°F) and average minimum temperature is 5°C (41°F).

More info about the annual temperatures and sunshine

When is the sunniest month in Channel Islands?

The sunniest days in Channel Islands are in June which has the most hours of sunshine per day. In June the sunshine percentage is 51% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 8.3 hours of sunshine per day.

More info about the annual sunshine.

When is the least sunny month in Channel Islands?

December has the least sunshine. In December the sunshine percentage is 22% making it extremely gloomy and overcast with little sunshine. There are 1.8 hours of sunshine per day.

More info about the annual sunshine.

When is the driest month in Channel Islands?

The driest month in Channel Islands is May with 0.3cm (0.1inches) of rain and June has the fewest days of rain with 12.8 days with some rain, a pretty wet time to visit the beach.

More info about the annual rainfall

When is the wettest month in Channel Islands?

The wettest month in Channel Islands is December with 0.9cm (0.4inches) of rain and January has the most days of rain with 21.6 days with some rain, a very wet time to visit the beach.

More info about the annual rainfall.

When is the sea the coldest in Channel Islands?

The coldest sea water temperatures in Channel Islands are found in March when they dip to 9°C (47°F) which is very cold and bracing, it's not recommended you swim with out a full wet suit.

More info about the annual sea temperatures.

When is the sea the warmest in Channel Islands?

The warmest sea water temperatures in Channel Islands are found in August when they peak at 18°C (65°F) which is cool for swimming, shorty wetsuit may help you extend your time in the water.

More info about the annual sea temperatures.

When is the most humid month in Channel Islands?

The most humid month in Channel Islands is August with a dew point (an indicator of humidity) of 15°C (60°F) which is comfortable for everyone.

More info about the annual humidity.

When is the least humid month in Channel Islands?

The least humid month in Channel Islands is February with a dew point of 6°C (42°F) which is a bit dry for some.

More info about the annual humidity.

When is the windiest month in Channel Islands?

The most windy month in Channel Islands is December when the average maximum windspeed is 37KM/H (23MPH) and the average wind speed is 25KM/H (15MPH).

More info about the annual wind conditions.

Annual Temperature for Channel Islands

The hottest month in Channel Islands is July when the average maximum temperature is 20°C (68°F), average temperature is 17°C (62°F) and average minimum temperature is 14°C (57°F).

The coolest month in Channel Islands is February when the average maximum temperature is 8°C (8°F), average temperature is 6°C (44°F) and average minimum temperature is 5°C (41°F).

Annual Sunshine for Channel Islands

The longest days in Channel Islands are in June, with an average of 16.2 hours of daylight per day. December has the shortest days with an average of 8.2 hours of daylight per day.

The sunniest days in Channel Islands are in June which has the most hours of sunshine per day. The sunshine percentage is 51% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 8.3 hours of sunshine per day.

December has the least sunshine. The sunshine percentage is 22% making it extremely gloomy and overcast with little sunshine. There are 1.8 hours of sunshine per day.

The ultraviolet index is the highest in June when it reaches 7.9 and lowest in December when it reaches 0.6.

An ultraviolet index reading of 8 to 10 indicates a very high risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 15 minutes. Take extra precautions because unprotected skin and eyes will be damaged and can burn quickly. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.

Annual Sea Temperature for Channel Islands

The warmest sea water temperatures in Channel Islands are found in August when they peak at 18°C (65°F) and lowest in March when they dip to 9°C (47°F).

The sea is best for swimming between June and November when the temperature is above 14°C (56°F) which is cold for swimming, a full wet suit is required to spend any length of time in the sea.

Annual Rainfall for Channel Islands

The wettest month in Channel Islands is December with 0.9cm (0.4inches) of rain and January has the most days of rain with 21.6 days with some rain, a very wet time to visit the beach.

The driest month in Channel Islands is May with 0.3cm (0.1inches) of rain and June has the fewest days of rain with 12.8 days with some rain, a pretty wet time to visit the beach.

Annual Humidity for Channel Islands

The most humid month in Channel Islands is August with a dew point (an indicator of humidity) of 15°C (60°F) which is comfortable for everyone.

The least humid month in Channel Islands is February with a dew point of 6°C (42°F) which is a bit dry for some.

Annual Wind Speed for Channel Islands

The most windy month in Channel Islands is December when the average maximum windspeed is 37KM/H (23MPH) and the average wind speed is 25KM/H (15MPH).

The least windy month in Channel Islands is August when the average maximum windspeed is 27KM/H (17MPH) and the average wind speed is 18KM/H (11MPH).

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