Climate and Weather of Alderney, Guernsey

The climate of Alderney

According to Abbreviationfinder, Alderney is one of three islands that make up the Bailiwick of Guernsey. The island is the northernmost Channel Island that belongs to the British crown. The island is only three kilometers long and three kilometers wide, making it the largest of the Channel Islands after Guernsey and Jersey. The only real settlement on Alderney is Saint Anne, where the vast majority of all islanders live. Alderney’s main source of income is tourism. In the summer months, many tourists come to the island from the French mainland by ferry. Mostly to admire the beautiful nature, but also to shop in Victoris street or take a ride on the tourist railway. It is also a popular place for sailors who come to the shelter of the island’s harbor for a while.

Temperate maritime climate

The location of the Channel Island of Alderney ensures that this island has a moderate maritime climate. This Cfb climate is known for moderate temperatures, which are a result of the influence the surrounding seawater has on the weather. As a result, both heat and cold are less likely to occur on Alderney. Winters are mild and quite gloomy. The summer months are characterized by higher temperatures and significantly more sunshine. The chance of a rain shower or a rainy day also remains during the summer.

The average maximum temperature on Alderney is between 7 and 10 degrees in winter to about 20 degrees during the hottest months. Every now and then a summer day is recorded. The maximums then rise to at least 25 degrees Celsius. Very occasionally it comes to a tropical day, when the mercury reaches the limit of 30 degrees. This happens once or twice in an average year. Average minimum temperatures on Alderney are between 5 to 6 degrees in winter. The highest maximums are reached in July and August: 13 to 14 degrees on average.

Precipitation falls on Alderney evenly throughout the year. Statistically, summers are slightly drier than winter. There is no guarantee on this. Some years have a different precipitation pattern. The average annual precipitation sum is 750 to 800 millimeters. It snows several days a year. The snow rarely lasts longer than a day.

Climate figures

The figures below are based on long-term average climate statistics. The temperatures are displayed in degrees Celsius (°C).

maximum temperature minimum temperature hours of sunshine per day days of rainfall per month water temperature
January 10℃ 8℃ 4 13 11℃
February 9℃ 7℃ 4 11 10℃
March 9℃ 8℃ 6 9 9℃
April 11℃ 9℃ 9 8 10℃
May 112℃ 11℃ 9 6 11℃
June 15℃ 13℃ 10 6 14℃
July 17℃ 15℃ 10 6 16℃
August 17℃ 16℃ 9 7 17℃
September 17℃ 15℃ 7 8 17℃
October 15℃ 14℃ 6 12 16℃
November 13℃ 11℃ 4 14 14℃
December 11℃ 9℃ 4 14 12℃

The weather in Alderney

Here you will find the weather forecast for Alderney. View the current weather in Alderney and the forecast for the coming days, such as temperatures, the chance of precipitation, the wind direction and the wind strength. With this weather data you can see what kind of weather you can expect in Alderney. Based on the climate statistics, we describe the weather per month in Alderney. This is not a long-term forecast, but gives the average weather forecast for all months of the year. Do you want to see the detailed weather forecast for Alderney? On the page with extra weather information we show the chance of snow, the wind chill, visibility, UV strength, air pressure and more good weather information.

The weather in January

In January, the average maximum temperature in Alderney is around 10 degrees Celsius. The average minimum temperature in January is 8 degrees. The number of hours that the sun is visible in January at this destination is around 4 hours per day. Within the whole month there is precipitation for about 13 days. If you look at the long-term averages, this results in a month with quite a lot of precipitation.

The weather in February

In the month of February, the average maximum temperature in Alderney is around 9 degrees Celsius. The average minimum temperature in February is 7 degrees. The number of hours that the sun is visible in February at this destination is around 4 hours per day. Within the whole month there is rainfall for about 11 days. If you look at the long-term averages, this ensures a reasonable amount of precipitation during this month.

The weather in March

In the month of March, the average maximum temperature in Alderney is around 9 degrees Celsius. The average minimum temperature in March is 8 degrees. The number of hours that the sun is visible in March at this destination is around 6 hours per day. Within the whole month there is precipitation for about 9 days. If you look at the long-term averages, this ensures a reasonable amount of precipitation during this month.

The weather in April

In the month of April, the average maximum temperature in Alderney is around 11 degrees Celsius. The average minimum temperature in April is 9 degrees. The number of hours that the sun is visible in April at this destination is around 9 hours per day. Within the whole month there is precipitation for about 8 days. If you look at the long-term averages, this means that there will not be much precipitation this month.

The weather in May

In the month of May, the average maximum temperature in Alderney is around 112 degrees Celsius. The average minimum temperature in May is 11 degrees. The number of hours that the sun is visible in May in this destination is around 9 hours per day. Within the whole month there is precipitation for about 6 days. If you look at the long-term averages, this means that there will not be much precipitation this month.

The weather in June

In the month of June, the average maximum temperature in Alderney is around 15 degrees Celsius. The average minimum temperature in June is 13 degrees. The number of hours that the sun is visible in June at this destination is around 10 hours per day. Within the whole month there is precipitation for about 6 days. If you look at the long-term averages, this means that there will not be much precipitation this month.

The weather in July

In July, the average maximum temperature in Alderney is around 17 degrees Celsius. The average minimum temperature in July is 15 degrees. The number of hours that the sun is visible in July at this destination is around 10 hours per day. Within the whole month there is precipitation for about 6 days. If you look at the long-term averages, this means that there will not be much precipitation this month.

The weather in August

In the month of August, the average maximum temperature in Alderney is around 17 degrees Celsius. The average minimum temperature in August is 16 degrees. The number of hours that the sun is visible in August in this destination is around 9 hours per day. Within the whole month there is precipitation for about 7 days. If you look at the long-term averages, this means that there will not be much precipitation this month.

The weather in September

In September, the average maximum temperature in Alderney is around 17 degrees Celsius. The average minimum temperature in September is 15 degrees. The number of hours that the sun is visible in September at this destination is around 7 hours per day. Within the whole month there is precipitation for about 8 days. If you look at the long-term averages, this ensures a reasonable amount of precipitation during this month.

The weather in October

In October, the average maximum temperature in Alderney is around 15 degrees Celsius. The average minimum temperature in October is 14 degrees. The number of hours that the sun is visible in October at this destination is around 6 hours per day. Within the whole month there is precipitation for about 12 days. If you look at the long-term averages, this results in a month with quite a lot of precipitation.

The weather in November

In November, the average maximum temperature in Alderney is around 13 degrees Celsius. The average minimum temperature in November is 11 degrees. The number of hours that the sun is visible in November at this destination is around 4 hours per day. Within the whole month there is precipitation for about 14 days. If you look at the long-term averages, this results in a month with quite a lot of precipitation.

The weather in December

In December, the average maximum temperature in Alderney is around 11 degrees Celsius. The average minimum temperature in December is 9 degrees. The number of hours that the sun is visible in December at this destination is around 4 hours per day. Within the whole month there is precipitation for about 14 days. If you look at the long-term averages, this results in a month with quite a lot of precipitation.

Alderney, Guernsey