Last updated: January 18, 2025
Saint John, Grenada, boasts a tropical savanna climate classified under the Köppen-Geiger system as Aw. The region experiences a warm and inviting atmosphere throughout the year, with average temperatures hovering around 27°C (80°F). The coolest month, February, sees nighttime lows of approximately 23°C (74°F), while October marks the peak temperatures, reaching a maximum of 29°C (85°F). This combination of steady warmth and minimal temperature fluctuation creates ideal conditions for both residents and visitors to enjoy the vibrant culture and stunning natural beauty of the area.
Saint John, Grenada, experiences a consistent warm climate throughout the year, with temperatures exhibiting only slight seasonal variation. The year begins with mild conditions in January and February, where minimum temperatures hover around 23°C (74°F) and average highs reach about 27°C (81°F). As spring approaches, from March to April, temperatures gradually rise, maintaining an average of 26°C (79°F) and peaking at 27°C (82°F), while transitioning into the warmer months of May to August, where conditions become progressively warmer. July and August mark the height of summer, with average temperatures peaking at 28°C (83°F) and 29°C (84°F), respectively. As fall arrives, temperatures begin to stabilize, with November and December experiencing a gentle decline, but remaining comfortably within the 25°C to 28°C (77°F to 83°F) range. This stable temperature profile creates a pleasant tropical environment well-suited for year-round outdoor activities.
Gouyave experiences a climate marked by relatively warm temperatures throughout the year, with a minimum of 23°C (74°F) recorded in February and reaching a maximum of 29°C (85°F) in October. This mild temperature range makes Gouyave an attractive destination for visitors looking to enjoy pleasant weather. For more details on the monthly temperatures in Gouyave, visit monthly temperatures in Gouyave.
Saint John, Grenada, experiences a varied precipitation pattern throughout the year, with a distinct wet season that begins in late spring and lasts into the fall. January and February are relatively dry months, receiving 47 mm (1.8 in) and 34 mm (1.3 in) of rain, respectively, accompanied by about 13 rainy days each. As the dry season transitions into late spring, March and April see a slight increase in precipitation, with rainfall recorded at 40 mm (1.6 in) and 25 mm (1.0 in), and a reduction in rainy days to 12 and 9, respectively. However, May begins a notable escalation in rainfall, signaling the approach of the wet season.
The peak of precipitation occurs during the summer months, particularly in July and August, when rainfall reaches staggering heights of 154 mm (6.1 in) and 165 mm (6.5 in), with an average of 24 to 25 rainy days. September through November continues this trend, with October recording the highest monthly rainfall at 186 mm (7.3 in), ensuring the transitional period into winter remains vibrant and lush. Even December, typically considered a drier month, concludes the year with 71 mm (2.8 in) of rain over 20 days, reflecting the region's consistent tropical climate where rain can often reshape the landscape.
Saint John, Grenada, enjoys a generous amount of sunshine year-round, with a notable increase in sunny hours as the year progresses from winter to summer. The year begins with 268 hours of sunshine in January, gradually rising to 305 hours in February and peaking in March at 345 hours. This early spring period marks a transition where daylight hours become more abundant, encouraging outdoor activities and explorations of the stunning coastal environment. April and May maintain this trend, with sunshine durations of 336 hours and 353 hours, respectively, which are often favored by tourists for their clear blue skies and warm temperatures.
As the summer months approach, sunshine hours remain consistently high, featuring 345 hours in July and 343 hours in August. This peak summer period demonstrates robust sunlight that continues into the early fall, although slightly tapering to 326 hours by September. The latter part of the year, from October to December, sees a modest decline in sunshine hours, ranging from 325 hours in October to 316 hours in November, and concluding the year with 328 hours in December. Despite this reduction, Saint John still enjoys a substantial amount of sunlight throughout the year, making it an inviting destination for sun-seekers.
The UV Index in Saint John, Grenada, consistently indicates extreme levels of ultraviolet radiation for most of the year, posing potential health risks for residents and visitors alike. January starts the year with a UV Index of 11, which escalates to a striking 14 by March through May, underscoring the need for protective measures as sun exposure can lead to skin damage in as little as 10 minutes. This extreme classification remains prevalent in the summer months, with both July and August also registering a UV Index of 13 to 14, maintaining the urgency for sun safety practices as the sun's rays remain intensely potent.
As the year progresses into the latter months, the UV Index gradually decreases. October maintains a high UV Index of 13, but it recedes to 11 in November and trickles down to 10 in December. The reduction in December allows for a slightly longer burn time of 15 minutes, although caution is still advised due to the very high classification. This consistent exposure to extreme UV conditions throughout the majority of the year reinforces the importance of sun protection strategies, including the use of sunscreen, protective clothing, and seeking shade, to mitigate health risks associated with prolonged sun exposure in Saint John.
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In Saint John, Grenada, daylight duration remains fairly consistent throughout the year, typically ranging between 11 to 12 hours per day. The year begins with 11 hours of daylight in January and February, providing a balanced amount of illumination for both residents and visitors. As spring approaches, daylight increases slightly, peaking at 12 hours from March through August. This extended daylight during these months offers ample opportunities for outdoor activities, making it a prime time for tourism and enjoying the island's natural beauty.
As the year transitions into the fall months, daylight durations taper off once again to 11 hours in October and remain steady through November and December. This cyclical pattern mirrors the region's tropical climate, where consistent daylight hours help to sustain vibrant ecosystems. Despite the minor fluctuations, Saint John benefits from a wealth of daylight throughout the year, enhancing the charm of this picturesque destination and encouraging a lifestyle deeply connected to the outdoors.
Gouyave, Grenada, experiences a warm tropical climate with average temperatures ranging from 26°C (79°F) to 28°C (83°F) throughout the year. The region sees its highest precipitation from June to October, peaking at 186 mm (7.3 in) in October, while enjoying ample sunshine, particularly in March and May with over 350 hours. The cooler months of December and January still offer pleasant warmth and lower rainfall. For more detailed information, visit the Gouyave climate.
In conclusion, Saint John, Grenada, presents a captivating climate characterized by consistent warmth, abundant sunshine, and high UV exposure throughout the year. With a tropical savanna classification, the region enjoys average temperatures ranging from 23°C to 29°C and a significant amount of daylight, typically between 11 to 12 hours daily. The seasonal trends indicate a marked increase in precipitation during the summer months, demanding careful sun protection due to extreme UV levels. Collectively, these climatic features define Saint John as a vibrant destination, where residents and visitors alike can revel in the island's natural beauty balanced with the need for mindfulness regarding sun safety and weather patterns.