Climate and monthly weather forecastGrandes Capelles, Guernsey
Climate and monthly weather forecast
The climate of Grandes Capelles
Based on the Köppen climate classification, the capital of Guernsey, Grandes Capelles, is categorized as having a marine west coast climate, with warm summers. Geographically located in the English Channel, the weather in Grandes Capelles exhibits characteristics of Northern latitude climates.An intriguing subtlety of Grandes Capelles climate is the rather limited temperature fluctuations. With the average high temperature plateauing from 9.2°C (48.6°F) to 17.8°C (64°F) and the lowest temperatures showing a similar trend with averages ranging from 7°C (44.6°F) to 15.3°C (59.5°F), the mildness of this marine climate becomes apparent. Humidity stands relatively high throughout the year, peaking at 84% during the summer months and dropping slightly to 77% during winter.
The town's precipitation tendencies bring an element of predictability, with rainfall ranging from 26mm (1.02") in July to a high of 87mm (3.43") in November. Despite the island body's position in the Channel, snowfall in Grandes Capelles is a rare occurrence; it remains close to none throughout the year. The southwestern winds of the Atlantic maintain a steady pace throughout the year, escalating slightly during winter months with speeds from 21.9km/h (13.6mph) to 36km/h (22.4mph).
The best time to visit Grandes Capelles
Factoring in parameters such as temperature, precipitation, daylight, and sunshine hours, the most opportune time for a visit to Grandes Capelles might be between June and August. This period presents the peak of pleasant weather conditions. Summer days in Grandes Capelles are typically warm with high temperatures averaging between 15.2°C (59.4°F) to 17.8°C (64°F), providing a comfortable atmosphere for outdoor activities. The rainfall is also at its minimum during these months, averaging from 26mm (1.02") to 33mm (1.3").The worst time to visit Grandes Capelles
Oppositely, planning a visit during late autumn to early winter, specifically between November and January, might prove to be less hospitable. The period is characterized by the year's lowest daylight hours, 9.1 hours to 8.3 hours, and highest rainfalls, with 87mm (3.43") in November and 70mm (2.76") in December. Moreso, it can be chilly with the average high temperature a mere 11.1°C (52°F) to 9.8°C (49.6°F), and the average low temperature hovering between 9.2°C (48.6°F) to 7.8°C (46°F).Spring weather in Grandes Capelles
Spring in Grandes Capelles is mild and becoming. From March to May, daily highs steadily increase from 9.8°C (49.6°F) in March to 12.8°C (55°F) in May. Rainfall lessens gradually over these months from 38mm (1.5") in March to 27mm (1.06") in May, allowing longer daylight hours from 11.9 hours to 15.4 hours and sunshine durationSummer weather in Grandes Capelles
Summertime, from June through August, often presents the best of weather conditions. High temperatures average from 15.2°C (59.4°F) up to 17.8°C (64°F) in August. Rainfalls are fleeting with the averages 26mm (1.02") to 33mm (1.3"), making room for longer daylight hours from 16.2 hours to 15.8 hours, and lengthened sunshine hours up to 9.7 hours in July.Autumn weather in Grandes Capelles
Autumn, marked by September through November, initially experiences a continuation of summer's warmth, but temperatures gradually descend. The highs range from 17.2°C (63°F) in September to 13°C (55.4°F) in November, and rainfall begins to mount up from 31mm (1.22") in September to a peak of 87mm (3.43") in November.Winter weather in Grandes Capelles
Winter in Grandes Capelles, running December through February, is relatively mild in comparison to continental Europe. Temperatures oscillate from lows of 9.2°C (48.6°F) up to highs of 9.8°C (49.6°F). Rainfall hovers around high levels, with 70mm (2.76") in December dropping to 63mm (2.48") in February, while daylight becomes scarce with an average of just 8.3 hours.Weather in January
Grandes Capelles, Guernsey, kicks off the year with weather that leans towards the chilly side. January sees average temperatures lingering from 7.8°C (46°F) to 9.8°C (49.6°F) and it can be a bit damp with relatively high humidity. Weather in January »Weather in February
February is a mirror image of January in Grandes Capelles with its cool temperatures and often cloudy skies. Temperatures slightly drop, reaching lows of 7°C (44.6°F) and highs of 9.2°C (48.6°F). Rainfall lessens in comparison to the preceding month, making outings slightly more pleasant. Weather in February »Weather in March
The transition from winter to spring in the month of March manifests itself subtly in Grandes Capelles weather. A modest increase in the average temperature is observed, rising to between 7.4°C (45.3°F) and 9.8°C (49.6°F). The duration of daylight extends, thus enabling more daylight hours for exploration and activity. Weather in March »Weather in April
April in Grandes Capelles ushers in a noticeable warming trend with average highs reaching 11°C (51.8°F). This period marks a steady progression in terms of both temperatures and daylight hours. The weather during this month is characterized by the increase in sunshine hours and decrease in rainfall days to 13.3. Weather in April »Weather in May
In Grandes Capelles, May is the month where Spring is in full bloom. Accentuated by a comforting temperature range from 10.6°C (51.1°F) to 12.8°C (55°F), the climatic conditions are prime for outdoor activities. The city experiences a further decrease in rainfall, aiding in the growth of lush greenery. Weather in May »Weather in June
June welcomes the onset of summer in Grandes Capelles. The mercury climbs a little higher, averaging between 13.2°C (55.8°F) and 15.2°C (59.4°F). This is also the month with the most amount of daylight hours, 16.2 hours on average. Weather in June »Weather in July
This is the month when temperatures peak in Grandes Capelles. July is the warmest month, with temperatures rising from 15.3°C (59.5°F) to 16.9°C (62.4°F) on average. Long sunny days coupled with the warm climate attract tourists and locals alike to the outdoors. Weather in July »Weather in August
August in Grandes Capelles sees a continuation of warm summer weather. It is the month with the highest low temperature, averaging at 15.8°C (60.4°F). The relief of cool winds is optimum as it ensures a balance between warmth and comfort. Weather in August »Weather in September
September ushers in the autumn season in Grandes Capelles. The balmy summer temperatures begin to subside, setting the stage for cooler autumn nights. On average, temperatures range from 15.4°C (59.7°F) to 17.2°C (63°F). The city witnesses an increase in rainy days but holds on to a fair share of sunshine. Weather in September »Weather in October
In Grandes Capelles, October is characterized by few bouts of rainfall and reduced sunshine hours. Average temperatures fluctuate between 13.6°C (56.5°F) and 15.5°C (59.9°F), maintaining a mild climate. Sunshine intervals keep the days pleasantly warm despite the seasonal transition. Weather in October »Weather in November
November sees a steep decline in temperatures in Grandes Capelles, dropping to between 10.9°C (51.6°F) and 13°C (55.4°F). The city experiences shorter days and less sunshine hours, a stark contrast to the vibrant summer months. Weather in November »Weather in December
December rounds off the year in Grandes Capelles with overall temperatures dropping from 9.2°C (48.6°F) to 11.1°C (52°F). Moving towards the end of the year, the city experiences maximum rainfall, 70mm (2.76") on average. Despite these conditions, the city is decorated in festive cheer, which offers a silver lining even in dreary weather. Weather in December »Updated: Feb 9, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Throughout the year, in Grandes Capelles, Guernsey, there are 196.3 rainfall days, and 557mm (21.93") of precipitation is accumulated.
The only month with snowfall in Grandes Capelles is January.
The month with the most snowfall in Grandes Capelles, Guernsey, is January, when snow falls for 0.3 days and typically aggregates up to 2mm (0.08") of snow.
In Grandes Capelles, Guernsey, during the entire year, snow falls for 0.5 days and aggregates up to 2mm (0.08") of snow.
The months with the least sunshine are January, November and December, with an average of 3.9h of sunshine.
February, recording an average high temperature of 9.2°C (48.6°F) and a low temperature of 7°C (44.6°F), is Grandes Capelles's coldest month.
In Grandes Capelles, snow does not fall in February through December.
February is the month with the lowest UV index, with an average maximum UV index of 2.
The months with the highest humidity in Grandes Capelles are June and July, with an average relative humidity of 84%.
The month with the longest days is June, with an average of 16h and 12min of daylight.
July is the month with the least rainfall. Rain falls for 12.8 days and accumulates 26mm (1.02") of precipitation.
With an average of 9.7h of sunshine, July has the most sunshine of the year.
July through September, with an average maximum UV index of 5, are months with the highest UV index in Grandes Capelles, Guernsey.
Grandes Capelles, Guernsey, records the warmest temperatures in August, averaging a high of 17.8°C (64°F) and a low of 15.8°C (60.4°F).
On Sunday, 27. October 2024, at 02:00, Daylight Saving Time ends in Grandes Capelles, and the time zone changes from BST to GMT. The next Daylight Saving Time starts on Sunday, 30. March 2025, at 01:00, and the time zone reverts from GMT to BST.
The months with the lowest humidity in Grandes Capelles, Guernsey, are November and December, with an average relative humidity of 77%.
The month with the most rainfall is November, when the rain falls for 22.8 days and typically aggregates up to 87mm (3.43") of precipitation.
December has the shortest days of the year in Grandes Capelles, with an average of 8h and 12min of daylight.
Average temperature
Grandes Capelles, Guernsey
The warmest month (with the highest average high temperature) is August (17.8°C).
The month with the lowest average high temperature is February (9.2°C).
The month with the highest average low temperature is August (15.8°C).
The coldest month (with the lowest average low temperature) is February (7°C).
Average pressure
Grandes Capelles, Guernsey
- Average pressure in January:
1016.1mbar - Average pressure in February:
1015.2mbar - Average pressure in March:
1016.2mbar - Average pressure in April:
1015.6mbar - Average pressure in May:
1017.4mbar - Average pressure in June:
1016.9mbar
- Average pressure in July:
1016.7mbar - Average pressure in August:
1016.4mbar - Average pressure in September:
1017.9mbar - Average pressure in October:
1015.7mbar - Average pressure in November:
1011.5mbar - Average pressure in December:
1016.5mbar
The month with the highest atmospheric pressure is September (1017.9mbar).
The month with the lowest atmospheric pressure is November (1011.5mbar).
Average wind speed
Grandes Capelles, Guernsey
- Average wind speed in January:
34.1km/h - Average wind speed in February:
34km/h - Average wind speed in March:
30.3km/h - Average wind speed in April:
25km/h - Average wind speed in May:
23.7km/h - Average wind speed in June:
22.8km/h
- Average wind speed in July:
21.9km/h - Average wind speed in August:
22.8km/h - Average wind speed in September:
25.8km/h - Average wind speed in October:
29.1km/h - Average wind speed in November:
34.8km/h - Average wind speed in December:
36km/h
The windiest month (with the highest average wind speed) is December (36km/h).
The calmest month (with the lowest average wind speed) is July (21.9km/h).
Average humidity
Grandes Capelles, Guernsey
The months with the highest relative humidity are June and July (84%).
The months with the lowest relative humidity are November and December (77%).
Average rainfall
Grandes Capelles, Guernsey
The wettest month (with the highest rainfall) is November (87mm).
The driest month (with the least rainfall) is July (26mm).
Average rainfall days
Grandes Capelles, Guernsey
- Average rainfall days in January:
22 days - Average rainfall days in February:
17.7 days - Average rainfall days in March:
17 days - Average rainfall days in April:
13.3 days - Average rainfall days in May:
11.8 days - Average rainfall days in June:
11.5 days
- Average rainfall days in July:
12.8 days - Average rainfall days in August:
14 days - Average rainfall days in September:
13.5 days - Average rainfall days in October:
18.5 days - Average rainfall days in November:
22.8 days - Average rainfall days in December:
21.4 days
The month with the highest number of rainy days is November (22.8 days).
The month with the least rainy days is June (11.5 days).
Average snowfall
Grandes Capelles, Guernsey
The month with the highest snowfall is January (2mm).
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days
Grandes Capelles, Guernsey
- Average snowfall days in January:
0.3 days - Average snowfall days in February:
0.2 days - Average snowfall days in March:
0 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0 days - Average snowfall days in December:
0 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight / Average sunshine
Grandes Capelles, Guernsey
- Average daylight in January:
8h and 42min - Average daylight in February:
10h and 6min - Average daylight in March:
11h and 54min - Average daylight in April:
13h and 48min - Average daylight in May:
15h and 24min - Average daylight in June:
16h and 12min
- Average daylight in July:
15h and 48min - Average daylight in August:
14h and 24min - Average daylight in September:
12h and 36min - Average daylight in October:
10h and 48min - Average daylight in November:
9h and 6min - Average daylight in December:
8h and 12min
The month with the longest days is June (Average daylight: 16h and 12min).
The month with the shortest days is December (Average daylight: 8h and 12min).
- Average sunshine in January:
3h and 54min - Average sunshine in February:
4h and 0min - Average sunshine in March:
6h and 12min - Average sunshine in April:
9h and 6min - Average sunshine in May:
9h and 6min - Average sunshine in June:
9h and 6min
- Average sunshine in July:
9h and 42min - Average sunshine in August:
9h and 12min - Average sunshine in September:
8h and 24min - Average sunshine in October:
4h and 54min - Average sunshine in November:
3h and 54min - Average sunshine in December:
3h and 54min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The months with the least sunshine are January, November and December (Average sunshine: 3h and 54min).
Average sunshine days
Grandes Capelles, Guernsey
- Average sunshine days in January:
5.5 days - Average sunshine days in February:
6.9 days - Average sunshine days in March:
10.7 days - Average sunshine days in April:
14.8 days - Average sunshine days in May:
16.3 days - Average sunshine days in June:
16 days
- Average sunshine days in July:
15.4 days - Average sunshine days in August:
12.1 days - Average sunshine days in September:
13.1 days - Average sunshine days in October:
8.6 days - Average sunshine days in November:
4 days - Average sunshine days in December:
5.3 days
The month with the most sunshine days is May (16.3 days).
The month with the least sunshine days is November (4 days).
Average UV index
Grandes Capelles, Guernsey
The months with the highest UV index are July, August and September (UV index 5).
The month with the lowest UV index is February (UV index 2).
Average cloud cover
Grandes Capelles, Guernsey
The months with the most cloud cover are November and December (Cloud cover 63).
The month with the least cloud cover is July (Cloud cover 37).
Average visibility
Grandes Capelles, Guernsey
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
