, cool and humid throughout the year.
The island is located in the English Channel, a short distance from the French coast of Lower Normandy, and belongs to Great Britain.
amounts to 840 millimeters (33 inches) per year. The relatively wettest season is autumn, the least rainy is summer.
, from December to February, is quite cold: temperatures are not so low, but wind and humidity can increase the sensation of cold. The sky is often cloudy, and rainfall is frequent. Sometimes, intense Atlantic depressions can cause wind storms.
Snowfalls are relatively rare and not abundant. Usually, cold spells are not intense and do not last long. The temperature rarely drops below -3 °C (26.5 °F), although the coldest record is -7.8 °C (18 °F), set in January 1963.
, from March to May, the temperature slowly rises, and Atlantic fronts become a bit less frequent. In May, it is often still quite cold, especially in the first half of the month.
, from June to August, is cool, with quite frequent rains, but also with a bit of good weather. Sometimes fog can form.
Hot days are rare: the temperature may not reach 25 °C (77 °F) for an entire month. However, it can sometimes exceed 30 °C (86 °F). The highest record is 34.2 °C (93.6 °F) and was set in July 2022.
, from September to November, is gray, cloudy and rainy, and with each passing week, it gets progressively colder. In November, the wind is often moderate or strong.
in Guernsey does not shine often from October to March (although it can come out between one disturbance and another), while from April to September, it shines for an acceptable number of hours. In one year, there are 1,865 hours of sunshine: we are at the levels of the English south coast, which is the highest in Great Britain.
is cold all year round, however, from July to September the water temperature reaches 17/18 °C (62/64 °F).
to visit Guernsey runs from June to mid-September. July and August are the warmest months, or the least cool, however, it's better to bring a sweatshirt and a light jacket also in midsummer.
. Here are the average temperatures.
January is generally a quite mild month. The average temperature is of
7.2 °C, with a minimum of
5.3 °C and a maximum of
9 °C.
On the coldest nights of the month, the temperature usually drops to around
0.5 °C. However, it dropped to
-4.5 °C in January 1997.
On the warmest days of the month, the temperature usually reaches around
12 °C. However, it reached
13.3 °C in January 2007.
Precipitation amounts to
95 mm, distributed over 15 days.
The day lasts on average 8 hours and 40 minutes.
There are on average 2 hours of sunshine per day. So, the sun shines 23% of the time.
The average humidity is 84%. Hence, the air is normally humid.
The average wind speed is of
24.7 kph.
The average sea temperature is of
10 °C. Therefore, the sea is very cold for swimming.
February, the coldest month of the year, is generally a quite mild month. The average temperature is of
6.8 °C, with a minimum of
4.8 °C and a maximum of
8.8 °C.
On the coldest nights of the month, the temperature usually drops to around
0 °C. However, it dropped to
-7.2 °C in February 1991.
On the warmest days of the month, the temperature usually reaches around
12 °C. However, it reached
16.1 °C in February 2019.
Precipitation amounts to
70 mm, distributed over 11 days.
The day lasts on average 10 hours and 10 minutes.
There are on average 3 hours of sunshine per day. So, the sun shines 30% of the time.
The average humidity is 83%. Hence, the air is normally humid.
The average wind speed is of
23.1 kph.
The average sea temperature is of
9 °C. Therefore, the sea is very cold for swimming.
March is generally a quite mild month. The average temperature is of
8 °C, with a minimum of
5.7 °C and a maximum of
10.2 °C.
On the coldest nights of the month, the temperature usually drops to around
2 °C. However, it dropped to
-3 °C in March 2018.
On the warmest days of the month, the temperature usually reaches around
15 °C. However, it reached
18.6 °C in March 2012.
Precipitation amounts to
65 mm, distributed over 12 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 4 hours of sunshine per day. So, the sun shines 34% of the time.
The average humidity is 83%. Hence, the air is normally humid.
The average wind speed is of
21.5 kph.
The average sea temperature is of
9 °C. Therefore, the sea is very cold for swimming.
April is generally a mild month. The average temperature is of
9.6 °C, with a minimum of
6.9 °C and a maximum of
12.3 °C.
On the coldest nights of the month, the temperature usually drops to around
3 °C. However, it dropped to
0.1 °C in April 2013.
On the warmest days of the month, the temperature usually reaches around
18.5 °C. However, it reached
24.5 °C in April 2020.
Precipitation amounts to
55 mm, distributed over 10 days.
The day lasts on average 13 hours and 50 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 47% of the time.
The average humidity is 82%. Hence, the air is normally humid.
The average wind speed is of
19.5 kph.
The average sea temperature is of
10 °C. Therefore, the sea is very cold for swimming.
May is generally a mild month. The average temperature is of
12.2 °C, with a minimum of
9.3 °C and a maximum of
15.1 °C.
On the coldest nights of the month, the temperature usually drops to around
6 °C. However, it dropped to
1.9 °C in May 1997.
On the warmest days of the month, the temperature usually reaches around
22 °C. However, it reached
25.9 °C in May 2003.
Precipitation amounts to
50 mm, distributed over 9 days.
The day lasts on average 15 hours and 25 minutes. So the days are long.
There are on average 7.5 hours of sunshine per day. So, the sun shines 49% of the time.
The average humidity is 82%. Hence, the air is normally humid.
The average wind speed is of
19.1 kph.
The average sea temperature is of
12 °C. Therefore, the sea is very cold for swimming.
June is generally a very mild month. The average temperature is of
14.7 °C, with a minimum of
11.7 °C and a maximum of
17.7 °C.
On the coldest nights of the month, the temperature usually drops to around
8.5 °C. However, it dropped to
7 °C in June 1991.
On the warmest days of the month, the temperature usually reaches around
24.5 °C. However, it reached
29.8 °C in June 1995.
Precipitation amounts to
45 mm, distributed over 7 days.
The day lasts on average 16 hours and 10 minutes. So the days are long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
There are on average 8 hours of sunshine per day. So, the sun shines 51% of the time.
The average humidity is 83%. Hence, the air is normally humid.
The average wind speed is of
18.2 kph.
The average sea temperature is of
14 °C. Therefore, the sea is very cold for swimming.
July is generally a very mild month. The average temperature is of
16.6 °C, with a minimum of
13.7 °C and a maximum of
19.6 °C.
On the coldest nights of the month, the temperature usually drops to around
11 °C. However, it dropped to
8.7 °C in July 1996.
On the warmest days of the month, the temperature usually reaches around
26 °C. However, it reached
32.6 °C in July 2016.
Precipitation amounts to
40 mm, distributed over 8 days.
The day lasts on average 15 hours and 40 minutes. So the days are long.
There are on average 8 hours of sunshine per day. So, the sun shines 52% of the time.
The average humidity is 83%. Hence, the air is normally humid.
The average wind speed is of
17.9 kph.
The average sea temperature is of
17 °C. Therefore, the sea is cold for swimming.
August, the warmest month of the year, is generally a very mild month. The average temperature is of
17 °C, with a minimum of
14.1 °C and a maximum of
19.8 °C.
On the coldest nights of the month, the temperature usually drops to around
11.5 °C. However, it dropped to
10.3 °C in August 1993.
On the warmest days of the month, the temperature usually reaches around
25.5 °C. However, it reached
32 °C in August 2020.
Precipitation amounts to
50 mm, distributed over 8 days.
The day lasts on average 14 hours and 20 minutes. So the days are long.
There are on average 7.5 hours of sunshine per day. So, the sun shines 52% of the time.
The average humidity is 84%. Hence, the air is normally humid.
The average wind speed is of
17.1 kph.
The average sea temperature is of
18 °C. Therefore, the sea is cold for swimming.
September is generally a very mild month. The average temperature is of
15.6 °C, with a minimum of
13.1 °C and a maximum of
18.2 °C.
On the coldest nights of the month, the temperature usually drops to around
9.5 °C. However, it dropped to
7.9 °C in September 2010.
On the warmest days of the month, the temperature usually reaches around
23 °C. However, it reached
28.1 °C in September 2020.
Precipitation amounts to
60 mm, distributed over 9 days.
The day lasts on average 12 hours and 30 minutes.
There are on average 6 hours of sunshine per day. So, the sun shines 48% of the time.
The average humidity is 82%. Hence, the air is normally humid.
The average wind speed is of
18.8 kph.
The average sea temperature is of
17 °C. Therefore, the sea is cold for swimming.
October is generally a mild month. The average temperature is of
13.1 °C, with a minimum of
11 °C and a maximum of
15.3 °C.
On the coldest nights of the month, the temperature usually drops to around
7 °C. However, it dropped to
3.5 °C in October 2003.
On the warmest days of the month, the temperature usually reaches around
19 °C. However, it reached
22.2 °C in October 2011.
Precipitation amounts to
95 mm, distributed over 13 days.
The day lasts on average 10 hours and 40 minutes.
There are on average 4 hours of sunshine per day. So, the sun shines 35% of the time.
The average humidity is 82%. Hence, the air is normally humid.
The average wind speed is of
21.5 kph.
The average sea temperature is of
15 °C. Therefore, the sea is cold for swimming.
November is generally a mild month. The average temperature is of
10.2 °C, with a minimum of
8.4 °C and a maximum of
12.1 °C.
On the coldest nights of the month, the temperature usually drops to around
4 °C. However, it dropped to
-0.8 °C in November 2010.
On the warmest days of the month, the temperature usually reaches around
15.5 °C. However, it reached
17.1 °C in November 2016.
Precipitation amounts to
105 mm, distributed over 15 days.
The day lasts on average 9 hours and 5 minutes.
There are on average 2.5 hours of sunshine per day. So, the sun shines 29% of the time.
The average humidity is 82%. Hence, the air is normally humid.
The average wind speed is of
23.2 kph.
The average sea temperature is of
13 °C. Therefore, the sea is very cold for swimming.
December is generally a quite mild month. The average temperature is of
8 °C, with a minimum of
6.2 °C and a maximum of
9.9 °C.
On the coldest nights of the month, the temperature usually drops to around
1.5 °C. However, it dropped to
-1.8 °C in December 1991.
On the warmest days of the month, the temperature usually reaches around
13 °C. However, it reached
14.4 °C in December 2015.
Precipitation amounts to
115 mm, distributed over 16 days.
The day lasts on average 8 hours and 10 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
There are on average 2 hours of sunshine per day. So, the sun shines 23% of the time.
The average humidity is 83%. Hence, the air is normally humid.
The average wind speed is of
24.9 kph.
The average sea temperature is of
12 °C. Therefore, the sea is very cold for swimming.