Last updated: February 24, 2025
April in Sullivan's Island offers a delightful retreat, showcasing an average temperature of 19°C (66°F), with daytime highs reaching up to a pleasant 27°C (81°F). Cool nights can dip to a refreshing 6°C (42°F), perfect for cozy evenings. Although visitors should be prepared for some rain, averaging 105 mm (4.1 in) over 8 days, the island's charm remains undeterred. With humidity levels hovering around 78%, April presents a lush, vibrant atmosphere that captivates both nature enthusiasts and beach lovers alike.
April marks a delightful transition into warmer weather on Sullivans Island, where temperatures begin to rise steadily. With a minimum temperature of 6°C (42°F) and an inviting average of 19°C (66°F), the month radiates a refreshing warmth that beckons outdoor activities. Daytime highs can reach up to 27°C (81°F), making it perfect for beach outings and enjoying the vibrant local culture. This month not only showcases a significant increase from March’s cooler averages but also hints at the approaching summer, as the coastal charm of Sullivans Island truly comes to life. As the island shakes off the remnants of winter, April stands out as a pleasant prelude to the delightful warmth ahead.
April brings a notable shift in precipitation patterns for Sullivans Island, with 105 mm (4.1 in) of rainfall over approximately 8 days. This increase from March's 62 mm (2.4 in) suggests that as spring unfolds, the area begins to experience more substantial moisture. Comparing April's totals to the preceding months highlights a significant rise, which can be attributed to the onset of warmer weather and increasing humidity. Interestingly, rainfall peaks continue into the summer months, especially in June and July, where totals escalate dramatically, reaching 144 mm (5.7 in) and 171 mm (6.7 in), respectively. Thus, April serves as a precursor to a wetter season, setting the stage for the lush, vibrant landscapes that characterize the island in the following months.
April ushers in slightly lower humidity levels on Sullivans Island, with an average of 78%, a gentle decline from the winter months. This trend of diminishing humidity continues from the chilly February and March averages of 79%, setting the stage for a drier spring. Notably, April's humidity aligns with May and June, maintaining a consistent atmosphere that hints at the warm, inviting summer months ahead. As the temperatures rise in July and August, humidity spikes again, but for now, April offers a refreshing breath of air, signaling a transition towards the sunnier, more humid days of summer.
As April rolls into Sullivans Island, residents and visitors alike should brace themselves for a very high UV index of 10, indicating a significant risk of harm from unprotected sun exposure. This month sees a continuation of rising UV levels that started in March, with burn times dropping to a brisk 15 minutes. The transition from moderate exposure in January to the extreme ratings anticipated in the coming months underscores a trend of increasingly intense sunlight as spring unfolds into summer. With May expected to reach an extreme UV index of 11, it's essential to take proactive measures for skin protection. Whether you're basking on the beach or enjoying outdoor activities, being informed is crucial. For detailed insights, check out the Sullivans Island UV Index to stay ahead of the sun's rays.
UV Risk Categories
April brings a delightful surge of sunshine to Sullivan's Island, capturing 313 hours of golden rays. This marks a significant increase from previous months, following the steady climb in daylight hours from 282 in March. As spring unfolds, the warm weather invites both locals and visitors to embrace the outdoors, setting the stage for even brighter days ahead. With May expected to shine with 342 hours of sun, the trend shows a clear transition into more sun-soaked days, making Sullivan's Island an idyllic retreat to enjoy the blossoming beauty of spring.
April brings a delightful shift in Sullivan Island's weather patterns, with a 57% chance of sunny days, representing a significant increase from the preceding months. While January to March hover below 45%, April stands out as one of the sunniest months, offering a refreshing contrast to the often overcast early spring. This trend of sunnier skies continues into May, maintaining a healthy 53% chance, before dipping again in the hotter summer months. Interestingly, as the year progresses, the likelihood of sunshine tends to fluctuate, with November returning to a welcoming 61%, suggesting that this coastal gem experiences an intriguing mix of sun and shade throughout the year.
As spring unfolds in Sullivans Island, April brings an invigorating boost in daylight, with the sun gracing the skies for 13 hours each day. This trend of increasing daylight, which began in January at a modest 10 hours, reaches its peak this month, marking a delightful transition from the shorter days of winter to the longer, sunnier afternoons of summer. Following April, daylight remains steady at 13 hours in May before climbing even higher to 14 hours in June and July. The gradual increase not only enhances outdoor activities but also ushers in the vibrant energy of the season, inviting residents and visitors alike to relish the extended hours under the sun. As summer approaches, the lingering daylight serves as a reminder of the warm, golden days ahead, setting the tone for outdoor adventures and beachside relaxation.
In April, the winds on Sullivan's Island take a gentle turn, with an average speed of 4.9 m/s (11 mph), marking a slight decrease from the briskness felt in March. This dip in wind speed is part of a noticeable trend as the spring air begins to settle, creating a serene yet refreshing atmosphere ideal for outdoor activities. Compared to the preceding months, April's winds hint at the calm preceding the summer, paving the way for the warmer days to come. As the year progresses, the winds tend to soften further, underscoring the peaceful charm of this coastal paradise.
The weather in Sullivans Island changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of April's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Sullivans Island and find detailed weather information for every month.
April and January contrast significantly in weather. April enjoys milder temperatures, with averages ranging from 6°C (42°F) to a pleasant 27°C (81°F), while January experiences much cooler conditions, with lows plunging to -5°C (24°F) and highs only reaching 21°C (70°F). Precipitation is higher in April, totaling 105 mm (4.1 in) over eight days, compared to January's 66 mm (2.6 in) over the same number of days. Interestingly, January has a slightly higher humidity level at 83% compared to April's 78%, making the latter feel somewhat more comfortable. For more detailed weather information, check out Sullivans Island weather in January.
When comparing April and February weather, April tends to be warmer with an average temperature of 19°C (66°F), peaking at a maximum of 27°C (81°F), compared to February's average of 14°C (57°F) and a maximum of 21°C (70°F). February experiences cooler minimum temperatures with lows around 2°C (36°F), while April's minimum is slightly higher at 6°C (42°F). Interestingly, April also sees more rainfall with a total of 105 mm (4.1 in) over 8 days, while February receives 91 mm (3.6 in) over 11 days. Both months have similar humidity levels, with February at 79% and April slightly lower at 78%. For more details on February weather, you can visit Sullivans Island weather in February.
April generally brings a noticeable warmth compared to March, with average temperatures rising from 15°C (60°F) in March to 19°C (66°F) in April. The maximum temperatures also increase significantly, reaching up to 27°C (81°F) in April compared to 23°C (74°F) in March. Precipitation is higher in April at 105 mm (4.1 in), occurring over 8 days, while March sees a total of 62 mm (2.4 in) over 7 days. Humidity remains relatively consistent, with April at 78% and March slightly higher at 79%. For a closer look at March's climate specifics, visit Sullivans Island weather in March.
April and May present a noticeable shift in weather patterns. In April, temperatures range from a cool minimum of 6°C (42°F) to a comfortable average of 19°C (66°F), peaking at a warm 27°C (81°F). The month sees about 105 mm (4.1 in) of precipitation over 8 days, contributing to a relatively humid atmosphere at 78%. In contrast, May warms up significantly, with minimum temperatures rising to 12°C (55°F) and an average of 23°C (74°F), reaching a maximum of 31°C (89°F). Precipitation decreases to 82 mm (3.2 in) while maintaining the same number of rainy days, resulting in a similar humidity level of 78%. For more detailed information, you can check Sullivans Island weather in May.
April and June present notable differences in weather patterns. In April, temperatures range from a minimum of 6°C (42°F) to a maximum of 27°C (81°F), with an average of 19°C (66°F). The month experiences about 105 mm (4.1 in) of rain over 8 days, maintaining a humidity level of 78%. In contrast, June sees warmer temperatures, with a minimum of 18°C (64°F) and a maximum reaching 32°C (90°F), averaging 26°C (79°F). The precipitation increases to 144 mm (5.7 in) over 17 days, while humidity remains consistent at 78%. For a more detailed look at June weather, you can visit Sullivans Island weather in June.
April and July exhibit contrasting weather patterns, ripe with their own characteristics. In April, temperatures range from a cool minimum of 6°C (42°F) to a pleasant maximum of 27°C (81°F), providing a mild average of 19°C (66°F). The month sees a total precipitation of 105 mm (4.1 in) over 8 days, with humidity levels around 78%. In comparison, July boasts significantly warmer temperatures, with a minimum of 22°C (72°F) and a maximum reaching 32°C (89°F), resulting in a higher average of 27°C (81°F). Additionally, it experiences increased rainfall, totaling 171 mm (6.7 in) over 16 days and a modest rise in humidity to 82%. For those curious about July conditions on Sullivans Island, more detailed information can be found here: Sullivans Island weather in July.
April and August present contrasting weather patterns. In April, temperatures range from a cool minimum of 6°C (42°F) to a pleasant maximum of 27°C (81°F), with an average of 19°C (66°F). The month experiences around 105 mm (4.1 in) of rainfall over 8 days, with humidity at 78%. In stark contrast, August sees much warmer temperatures, with a minimum of 23°C (73°F) and a maximum of 31°C (89°F), maintaining an average of 27°C (81°F). Precipitation is higher in August, totaling 197 mm (7.8 in) spread over 21 days, and humidity also increases slightly to 81%. This shift makes August feel more humid and often stormier than the milder, drier April. For more details, check out Sullivans Island weather in August.
April and September offer contrasting weather patterns. In April, temperatures range from a minimum of 6°C (42°F) to a maximum of 27°C (81°F), with an average of 19°C (66°F). It experiences moderate precipitation at 105 mm (4.1 in) over about 8 days and maintains a humidity level of 78%. In contrast, September sees warmer temperatures, with a minimum of 16°C (61°F), an average of 26°C (79°F), and a maximum of 32°C (90°F). The month also brings more rain, totaling 188 mm (7.4 in) spread across 14 days, along with slightly higher humidity at 81%. For more detailed insights, check out this link: Sullivans Island weather in September.
April and October offer distinct weather characteristics that cater to different preferences. In April, temperatures range from a minimum of 6°C (42°F) to a maximum of 27°C (81°F), with an average of 19°C (66°F) and 105 mm (4.1 in) of precipitation spread over 8 days. The humidity remains relatively high at 78%. Conversely, October presents slightly warmer temperatures, with a minimum of 7°C (46°F), an average of 23°C (73°F), and a maximum of 29°C (85°F). Rainfall is less intense, totaling 85 mm (3.4 in) over 10 days, while humidity also sits at 78%. For a detailed look at October weather, you can check Sullivans Island weather in October.
April and November present quite similar weather patterns, though they each embody distinct characteristics. In April, temperatures range from a minimum of 6°C (42°F) to a pleasant average of 19°C (66°F), peaking at 27°C (81°F), while November features slightly cooler temperatures, with a minimum of 3°C (38°F), an average of 16°C (62°F), and a maximum of 26°C (79°F). Both months receive comparable precipitation, around 105 mm (4.1 in) over approximately 8 days, although the humidity is marginally higher in November at 82%, compared to April’s 78%. For more detailed insights into November’s weather, you can check out Sullivans Island weather in November.
April and December present quite contrasting weather conditions. In April, temperatures range from a minimum of 6°C (42°F) to a maximum of 27°C (81°F), with an average of 19°C (66°F) and relatively high humidity at 78%. The month experiences about 105 mm (4.1 in) of precipitation over 8 days. In contrast, December sees cooler temperatures, with a minimum of 0°C (33°F) and a maximum of 22°C (72°F), averaging at 13°C (56°F). This month also has higher precipitation at 141 mm (5.6 in) over 10 days and slightly more humidity at 84%. For more detailed insights on December weather, you can refer to Sullivans Island weather in December.
April on Sullivans Island heralds the arrival of spring, transforming the coastal landscape with milder temperatures and a noticeable increase in humidity. As daytime highs reach a comfortable 27°C, visitors can enjoy pleasant outdoor activities, contrasting sharply with the chill of winter months. Though April experiences some rainfall, with precipitation occurring on about 8 days, the overall atmosphere is characterized by a vibrant and refreshing ambiance. This month stands out as a transition from the cooler, drier months to the warmer, more humid summers typical of the region. For a deeper dive into the unique characteristics of Sullivans Island weather, explore the detailed information at Sullivans Island Climate.