Last updated: January 18, 2025
St Martin, Guernsey, exhibits a Cfb climate classification under the Köppen-Geiger system, characterized by temperate maritime conditions that foster a vibrant ecosystem. The region experiences a minimum temperature of 0°C (32°F) in March, gradually rising to an average of 13°C (55°F) throughout the year. The warmest month, August, showcases a maximum temperature of 22°C (72°F), providing pleasant summer experiences for residents and visitors alike. This climatic profile underscores the unique weather patterns that influence the local flora, fauna, and overall lifestyle in St Martin.
In St Martin, Guernsey, temperature patterns exhibit a clear seasonal rhythm characterized by mild winters and warm summers. The year begins with cooler temperatures, as January and February see minimums dipping to 0°C (33°F) and 3°C (37°F), respectively, with averages remaining around 9°C (48°F). As spring arrives, temperatures gradually rise, reaching a pleasant average of 12°C (54°F) in May. Summer months, particularly July and August, showcase the region's warmth, with maximum temperatures peaking at 21°C (70°F) and 22°C (72°F). This seasonal warmth is sustained into early autumn, where September holds onto summer-like conditions before transitioning back to lower averages of 15°C (59°F) in October and 12°C (54°F) in November. By December, temperatures cool again, signaling the onset of winter, with averages of 11°C (51°F), reinforcing the moderate maritime climate that defines St Martin's weather throughout the year.
St Martin experiences a minimum temperature of 0°C (32°F) in March, while August sees a maximum of 22°C (72°F), reflecting a moderate climate throughout the year. For more detailed information on monthly temperatures, visit monthly temperatures in St Martin.
Precipitation in St Martin, Guernsey, exhibits distinct seasonal variations, with the winter months being particularly wet. January begins the year with the highest rainfall, reaching 94 mm (3.7 in) over approximately 14 days, followed closely by February with 86 mm (3.4 in) across 16 days. As spring approaches, rainfall diminishes significantly in April to 34 mm (1.3 in), with only 8 days of precipitation. This trend continues into May and June, where totals remain moderate at 55 mm (2.2 in) and 59 mm (2.3 in), respectively, signaling a brief respite before the summer months.
However, as autumn sets in, the precipitation levels surge, particularly in October and December. October experiences a notable spike with 144 mm (5.7 in) across 17 days, making it one of the wettest months of the year, while November follows closely with 126 mm (5.0 in) over 18 days. December rounds off the year with the highest rainfall total of 163 mm (6.4 in) and 21 days of rain, emphasizing the region's maritime climate and the tendency for wetter conditions during the winter and early spring months.
Sunshine duration in St Martin, Guernsey, showcases a remarkable progression from winter to summer, highlighting the region's shift toward more luminous days. The year opens with a modest 107 hours of sunlight in January, gradually increasing through February, where it rises to 163 hours. As spring unfolds, sunshine hours climb dramatically, peaking in April at 359 hours and reaching an impressive 414 hours in May, which sets the stage for a vibrant summer. June and July are the standout months, with sunshine durations of 416 hours and 436 hours, respectively, making them the sunniest periods of the year in St Martin.
As summer transitions to autumn, there is a noticeable decline in sunshine hours, although September still retains a healthy 338 hours, signaling a gradual shift rather than an abrupt change. By October, the daylight diminishes further to 270 hours, which heralds the onset of winter. November and December experience the most significant reductions, with sunshine hours dropping to 181 hours and 130 hours, respectively. This annual cycle reflects not just the climatic characteristics of St Martin, but also an inviting seasonal rhythm that residents and visitors recognize, reveling in the sun-drenched summers while bracing for the overcast winters.
The UV Index in St Martin, Guernsey, illustrates a distinct seasonal pattern that underscores the importance of sun safety throughout the year. During the winter months, particularly January and February, the UV Index remains low to moderate, peaking at 3 in February and allowing for a burn time of approximately 30 to 45 minutes without protection. As spring approaches, notably in March, the UV Index rises to 4, indicating a moderate risk, prompting increased caution, especially during midday hours. By April and May, the UV Index escalates to 6 and 7, respectively, transitioning into the high exposure category where burn times shorten to 25 minutes.
Summer months bring the most intense UV exposure, with June reaching a significant 9 on the index, categorizing it as very high. It's crucial during this time, with a burn time of just 15 minutes without protection. This trend continues in July, although it slightly decreases to 8. Throughout August and September, the UV Index remains high at 7 and 6, before retreating to moderate levels in October. The year concludes with lower UV exposures once again in November and December, with indices dipping back down to 2 and 1, indicating low risk and longer burn times of 45 minutes. This data highlights the importance of vigilance against UV radiation, particularly during the summer months when the risk is highest.
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Daylight duration in St Martin, Guernsey, reveals a clear seasonal variation that enhances the island's charm throughout the year. Starting with only 8 hours of daylight in January, the days gradually lengthen, reaching 10 hours in February and then 11 hours in March as spring approaches. The progression continues into April, where daylight extends to 13 hours, followed by a significant increase in May with 15 hours. The peak of daylight is observed in June, boasting an impressive 16 hours, allowing residents and visitors alike to fully enjoy the outdoor activities and natural beauty of the area.
As summer transitions to autumn, daylight hours begin to wane, dropping to 15 hours in July and 14 hours in August. By September, daylight diminishes further to 12 hours before falling to 10 hours in October. The decline continues into November, bringing only 9 hours of daylight, and finally returning to the initial 8 hours by December. This annual cycle of daylight reflects the seasonal rhythms of St Martin, enhancing the island's allure and encouraging outdoor exploration during the long summer days, while graceful transitions mark the arrival of winter.
St. Martin in Guernsey experiences a temperate maritime climate with mild winters and cool summers. Average temperatures range from a minimum of 0°C (32°F) in February to a maximum of 22°C (72°F) in August. The region receives significant rainfall, particularly in October, which sees an average of 144 mm (5.7 in), while sunshine hours peak in July with 436 hours. Overall, outdoor conditions are favorable for much of the year except during the wetter months. For more details, visit St Martin climate.
In conclusion, the climatic characteristics of St Martin, Guernsey, epitomize a temperate maritime environment, marked by distinct seasonal variations in temperature, precipitation, sunshine duration, UV index, and daylight. With mild winters that transition into vibrant summers, the island offers a unique opportunity for outdoor activities and engagement with nature throughout the year. The significant increase in sunshine and the highest UV index during the summer months underscore the need for sun safety, while the fluctuating daylight duration adds to the enchanting experience of each season. These patterns not only shape the lifestyle of St Martin's residents but also provide valuable insights for visitors seeking to experience the full spectrum of the island's natural beauty and climate throughout the year.