Climate and monthly weather forecastGroignêt, Guernsey
Climate and monthly weather forecast
The climate of Groignêt
Situated in the midst of the English Channel, Groignêt, Guernsey has a climate primarily dictated by marine influences. The Köppen climate classification categorizes it as a Marine West Coast climate with warm summer (Cfb). This climate type typically experiences moderate temperatures throughout the year, cool summers, and relatively damp and mild winters.Average monthly temperatures have subtle variations throughout the year. The lowest recorded average low temperature is approximately 7°C (44.6°F) in February, while the warmest months, July and August, reach average high temperature peaks of slightly under 18°C (64.4°F). Relative humidity levels also remain fairly constant, averaging between 77% and 84%. This is indicative of Groignêt's maritime influence, as marine climates tend to maintain higher relative humidity levels year-round due to the surrounding water bodies.
Yearly precipitation levels reflect the significant rainfall characteristic of a Cfb climate, with an annual total averaging around 500mm (19.69") across 185 precipitation-heavy days. During winter months, such as December, rainfall peaks to 70mm (2.76") within 21.4 days. Even during the drier months, from June to August, precipitation levels remain significant, with 26mm (1.02") to 33mm (1.3") of rainfall. By this note, Groignêt very rarely sees any snowfall, with a negligible average snowfall of 2mm (0.08") occurring only in January.
An array of daylight hours creates a noticeable pattern throughout the years. The longest daylight duration is witnessed during June with 16.2 hours, compared to the shortest in December, offering just 8.3 hours. Solar irradiance levels typically follow this pattern, peaking during the warm months and waning during the cold season.
The best time to visit Groignêt
The ideal time to visit Groignêt largely depends on individual weather preferences. However, generally speaking, the period from June to August provides a charming blend of moderate warmth, relatively low rainfall, and abundant daylight hours. Temperatures during these months average between 15.2°C (59.4°F) and 17.8°C (64°F), coupled with an inviting average of 9 hours of sunshine per day. This period is also favored by a relatively low rainfall of between 26mm (1.02") and 33mm (1.3") across 12 to 14 rainy days, thus offering ample opportunities to enjoy outdoor activities without significant disruption from rainfall.The worst time to visit Groignêt
Winter months from November to January might be considered less inviting for visitors due to the combination of lower temperatures, heightened rainfall, and reduced daylight hours. During this period, temperatures can drop to average lows of 7°C (44.6°F) to 9.2°C (48.6°F). The shorter daylight duration, particularly in December with just 8.3 hours, combined with fewer sunshine hours, can limit outdoor activities. Moreover, the heightened precipitation in November and December, hitting a peak of 87mm (3.43") of rainfall across 22.8 days, might discourage travel plans.Spring weather in Groignêt
Spring in Groignêt, from March to May, witnesses a gradual warming of temperatures and increased daylight hours. The weather transitions smoothly from average low temperatures of 7.4°C (45.3°F) in March to hitting highs of 12.8°C (55°F) by May. Correspondingly, daylight hours increase from 11.9 hours in March to 15.4 hours in May, providing ample opportunities for sightseeing and outdoor activities. Rainfall during this season decreases, going from 38mm (1.5") in March to 27mm (1.06") in May, spread across 13 to 12 rainy days respectively.Summer weather in Groignêt
Summer, extending from June to August, denotes the warmest season in Groignêt. Temperatures during this period typically range from 15.2°C (59.4°F) to 17.8°C (64°F), providing comfortable warmth corresponding with longer daylight hours. July stands as the month with longest daylight duration, stretching up to 16.2 hours. Meanwhile, rainfall is lowest during this season, ranging from 26mm (1.02") in July to 41mm (1.61") in August, over 12 to 14 days. Overall, summer presents a delightful progression of comfortable warm weather, long days, and decreased likelihood of precipitation.Autumn weather in Groignêt
Autumn in Groignêt, spanning September to November, is marked by a gradual decrease in temperature and daylight hours while seeing an increase in precipitation. Average temperatures tend to shift from 17.2°C (63°F) in September to 11.1°C (52°F) in November. Adversely, rainfall levels elevate during this season, with November witnessing a peak of 87mm (3.43") over 22.8 days. Despite increasing precipitation, autumn in Groignêt provides its unique charm with moderate temperatures and general climate changes.Winter weather in Groignêt
Winter in Groignêt sees a dip in the temperature, ranging from 9.8°C (49.6°F) in December to 7.8°C (46°F) in February. Correspondingly, daylight hours reduce to an average of 8.3 hours in December. Precipitation also increases during this season, especially in December, where Groignêt receives an average of 70mm (2.76") of rainfall over 21.4 days. Nevertheless, snow is a rarity, with a negligible 2mm (0.08") average snowfall only in January. Although winter can be colder and damper compared to other seasons, it provides an authentic view into the seasonality of a marine climate.Weather in January
January in Groignêt, Guernsey is characterized by an impressive rainfall amount at 63mm (2.48"), coupled with the distribution over 22 days, making it one of the wettest months of the year. The month starts off on a rather chilly and wet note. Weather in January »Weather in February
Despite it being only a month since January, February sees a significant drop in rainfall to 51mm (2.01"), experienced over an average of 17.7 days. Chilly temperatures remain prevalent throughout the month, complementing the winter season. Weather in February »Weather in March
The decrease in rainfall hitting Groignêt, Guernsey continues in March to 38mm (1.5") over 17 days, indicating a shift towards the dryer months. Conditions become milder compared to February, providing a slight preview of the impending spring season. Weather in March »Weather in April
By April, Groignêt, Guernsey welcomes a downward shift in rainfall to a modest 32mm (1.26") over just 13.3 days in the month. Compared to March, there is a noticeable improvement in the overall weather conditions. April marks the unmistakable arrival of spring, a delightful season characterized by moderate temperatures and blossoming flora. Weather in April »Weather in May
May in Groignêt, Guernsey brings about an even lower precipitation level that falls to 27mm (1.06") over 11.8 days. This period marks a shift from spring into the early stages of summer, showcasing brighter days and milder nights. Weather in May »Weather in June
June records the lowest rainfall in Groignêt, Guernsey at 26mm (1.02"), spread across a mere 11.5 days. This month is the official commencement of the much-awaited summer season, featuring warm temperatures and an abundance of sunshine. Weather in June »Weather in July
July sees a minor increase in rainfall from 26mm (1.02") to 33mm (1.3") over 12.8 days while the temperatures steadily continue to rise. The weather during this period is largely characterized by summer, making this a popular month for outdoor activities. Weather in July »Weather in August
In August, Groignêt, Guernsey experiences a small jump in rainfall to 41mm (1.61") across 14 days. The warmer temperatures persist, sustaining the summer atmosphere. Despite the uptick in precipitation, the overall charm of the summer is far from diminished. Weather in August »Weather in September
September records an imposing increase in rainfall to 58mm (2.28") over 18.5 days, indicating the onset of autumn in Groignêt, Guernsey. The weather starts to change as it prepares for the cooler autumn season. The waning days of summer slowly give way to shorter daylight hours and a gentle dip in temperatures. Weather in September »Weather in October
Groignêt, Guernsey experiences the first significant chill in October, with rainfall dramatically increasing to 87mm (3.43") over 22.8 days. The brisk autumn weather starts to become more evident. The reduced daylight hours and cloudier skies become more pronounced than in the preceding months. Weather in October »Weather in November
November in Groignêt, Guernsey is distinct for its heavy rainfall - the highest recorded in the year at 87mm (3.43") over 22.8 days. Temperatures begin to dip further as the region heads towards the winter season. The change from mild autumn to chilly winters manifests through more frequent showers and decreasing temperatures. Weather in November »Weather in December
Come December, Groignêt, Guernsey witnesses a slight reduction in rainfall to 70mm (2.76") over 21.4 days. The winter season, with its chilly temperatures, crisp winds, and sparse sunlight, is in full swing. The days of mild temperatures are replaced by the characteristically cold nights of winter. 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 Groignêt, there are 196.3 rainfall days, and 557mm (21.93") of precipitation is accumulated.
January is the only month when snow falls in Groignêt.
January is the month with the most snowfall in Groignêt, Guernsey. Snow falls for 0.3 days and accumulates 2mm (0.08") of snow.
Throughout the year, in Groignêt, Guernsey, there are 0.5 snowfall days, and 2mm (0.08") of snow is accumulated.
January, November and December, with an average of 3.9h of sunshine, are months with the least 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 Groignêt's coldest month.
In Groignêt, Guernsey, snow does not fall in February through December.
With an average maximum UV index of 2, February is the month with the lowest UV index in Groignêt.
The months with the highest humidity in Groignêt are June and July, with an average relative humidity of 84%.
The month with the longest days in Groignêt, Guernsey, 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.
The month with the most sunshine is July, with an average of 9.7h of sunshine.
July through September, with an average maximum UV index of 5, are months with the highest UV index in Groignêt, Guernsey.
The average temperatures in Groignêt reach their apex in August, averaging 17.8°C (64°F) at the high end and 15.8°C (60.4°F) at the low end.
On Sunday, 27. October 2024, at 02:00, Daylight Saving Time ends, 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.
November and December, with an average relative humidity of 77%, are the least humid months in Groignêt.
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.
With an average of 8h and 12min of daylight, December has the shortest days of the year in Groignêt, Guernsey.
Average temperature
Groignêt, 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
Groignêt, 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
Groignêt, 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
Groignêt, 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
Groignêt, Guernsey
The wettest month (with the highest rainfall) is November (87mm).
The driest month (with the least rainfall) is July (26mm).
Average rainfall days
Groignêt, 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
Groignêt, 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
Groignêt, 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
Groignêt, Guernsey
- Average daylight in January:
8h and 42min - Average daylight in February:
10h and 12min - 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
Groignêt, 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
Groignêt, 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
Groignêt, 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
Groignêt, 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).
