The climate of Grand Fort
Situated in
Guernsey,
Grand Fort experiences a maritime temperate climate, identified as Cfb by the Köppen climate classification - a marine west coast climate with warm summers. This translates into a year punctuated by moderate temperature ranges, coupled with consistent humidity rates and variable rainfall.
The year-round average temperature is relatively steady. High temperatures can peak at 17.8°C (64°F), typically noticed in
August, while the cool
January evenings dip as low as 7°C (44.6°F). Not only are the temperatures moderate, but the relative humidity remains consistent, fluctuating marginally from 77% to 84% throughout the year. It keeps the air consistently moist, suggesting a significant amount of water vapor present in the atmosphere.
Grand Fort gets its share of rainfall throughout the year. The wettest months are
November and
December, with rainfall averaging 87mm (3.43") and 70mm (2.76") respectively. In contrast, the driest months are
July and
May, with rainfall dropping to a low of 26mm (1.02") and 27mm (1.06"). It is interesting to note that despite the rainfall, the average hours of sunshine a day generally remain above 3.9, even in the gloomiest of months. The longest sunlit days, however, can be expected in
June and July, boasting an admirable 16.2 hours and 15.8 hours of daylight.
The best time to visit Grand Fort
To take full advantage of what
Grand Fort has to offer, consider visiting in the late spring or early summer - particularly in
May,
June, or
July. During these months, temperatures are warm enough for a variety of outdoor activities, ranging from 12.8°C (55°F) to 16.9°C (62.4°F). Importantly, these months also see the lowest average rainfall of the year, with May and July only recording rainfall of 27mm (1.06") and 26mm (1.02") respectively. Long daylight hours, from 15.4 hours to 16.2 hours, promise ample time for sightseeing. The highest UV Index is observed in July at 5, suggesting moderately intense sun exposure during peak daylight hours.
The worst time to visit Grand Fort
For those keen to avoid heavier rains and cooler temperatures, it might be best to steer clear of
Grand Fort from
November to
January. November is the wettest month with a rainfall of 87mm (3.43"), while temperatures in January sink to as low as 7°C (44.6°F). The reduced daylight hours, from 9.1 hours in November to 8.3 hours in
December, also curtail outdoor activities.
Spring weather in Grand Fort
From
March to
May, spring ushers in a gradual increase in temperature, rising from 9.8°C (49.6°F) to 12.8°C (55°F). Rainfall also sees a decreasing trend, from an average of 38mm (1.5") in March to a paltry 27mm (1.06") by May. The daylight hours progressively lengthen, offering from 11.9 hours to 15.4 hours of clear daylight.
Summer weather in Grand Fort
In the summer months of
June to
August,
Grand Fort experiences warm and pleasant temperatures, ranging from 15.2°C (59.4°F) to 17.8°C (64°F). These months also see marginal rainfall, especially
July with only 26mm (1.02"). Humidity remains consistent and comfortable throughout, and daylight extends its generous reach, offering up to 16.2 hours in June.
Autumn weather in Grand Fort
Autumn, ranging from
September through
November, is characterized by cooling temperatures and increasing rainfall. Rainfall in November peaks at 87mm (3.43"), and temperatures take a dip from 17.2°C (63°F) to 13°C (55.4°F).
Winter weather in Grand Fort
December through
February marks the cold winter season in
Grand Fort. The temperatures flirt with the cooler end of the spectrum, dropping to 7°C (44.6°F) in February. Rainfall remains appreciable, with December and
January recording 70mm (2.76") and 63mm (2.48") respectively. However, despite the shorter daylight hours, Grand Fort manages to maintain an average sunshine duration of 3.9 hours a day during these months.
Weather in January
January in
Grand Fort,
Guernsey shows a cooler start to the year. Temperatures tend to be mild, with rainfall being a frequent occurrence, resulting in higher humidity. Wind speeds reach their highest in January at 34.1km/h (21.2mph) and gusts can spike up to 47.7km/h (29.6mph), presenting possible challenges for outdoor activities.
Weather in January » Weather in February
Entering into
February, a slight drop in temperature and rainfall can be observed. Weather conditions improve in
Grand Fort as humidity levels decrease slightly compared to
January. February is particularly distinctive for being the last month to potentially experience snowfall, though accumulation is minimal at 2mm (0.08"), making the likelihood of a snowy scene in Grand Fort rare.
Weather in February »Weather in March
As spring unfolds in
March, there’s a distinct change in the weather of
Grand Fort. The month enjoys a significant increase in both daylight and sunshine hours, which aligns well with outdoor pursuits. Temperatures rise, rainfall dips and winds continue their decreasing trend from the previous month.
Weather in March »
Weather in April
April embodies the true spirit of spring in
Grand Fort. The weather continues to improve and the way sunshine dominates the higher number of daylight hours become more evident. While rainfall continues to decrease, the temperature steadily rises, encouraging outdoor interpersonal activity.
Weather in April » Weather in May
As summer approaches, the weather in
May in
Grand Fort shows a delightful transition. A further boost in sunshine hours and longer daylight hours result in glorious days, perfect for outdoor exploration. Combined with the warmth of a higher temperature, low wind speeds, and the same great visibility, May encourages numerous outdoor activities.
Weather in May »Weather in June
June in
Grand Fort welcomes the onset of summer and it brings along the highest average daylight hours. The outdoor weather conditions are excellent with the finest visibility, making this month even more conducive to sightseeing.
Weather in June »
Weather in July
Weather in
July holds the apex of summer for
Grand Fort with the highest temperature averages. Results in warmer days and balmy nights, making it the perfect time for beach and water activities. The month features a slight fluctuation in the weather parameters with a small decrease in rainfall and a decrease in daylight hours.
Weather in July »Weather in August
August continues the warmth of
July in
Grand Fort while beginning to signal the close of summer. This climatic shift is noticeable with a mild increase in rainfall amounting to 41mm (1.61"), from 26mm (1.02") the previous month.
Weather in August » Weather in September
As
Grand Fort,
Guernsey enters autumn,
September makes a clear break from the summer weather. Temperature starts to descend, along with a decrease in sunlight hours making the days shorter. Despite the drop in temperature, humidity remains almost constant since
August.
Weather in September »
Weather in October
October in
Grand Fort carries full swing autumn weather with substantial changes. The most apparent is a decrease in temperature and daylight hours, indicating the approach of winter. As autumn progresses, the rainfall indicates an upward spike, registering at 58mm (2.28").
Weather in October » Weather in November
November proves to be noticeably cooler in
Grand Fort,
Guernsey. The proximity to winter is acknowledged by further decreases in average temperatures and daylight hours. However, November holds the year's highest level of rainfall at 87mm (3.43"), leading to an increased number of rainy days.
Weather in November » Weather in December
December in
Grand Fort indicates the beginning of winter with the shortest daylight hours of the year. Although temperatures continue to drop, the difference from
November isn’t as pronounced as earlier transitions between months.
Weather in December »