Last updated: February 24, 2025
Experience the warmth of Sullivans Island in July, where temperatures peak at a delightful 32°C (89°F) and settle at a cozy 27°C (81°F) on average. As the sun shines brightly, the island welcomes occasional showers, with 171 mm (6.7 in) of rain spread over 16 days, keeping the landscape lush and vibrant. Visitors should also be prepared for high humidity levels, averaging 82%, which adds a tropical feel to your summer getaway. Explore this charming destination as you bask in its rich coastal atmosphere, balancing sunny days with refreshing rain.
In July, Sullivans Island embraces the heart of summer, with temperatures reaching a minimum of 22°C (72°F) and peaking at a pleasant 32°C (89°F). The average temperature hovers around 27°C (81°F), making it an ideal time for beachgoers and outdoor enthusiasts. This month showcases a notable rise in warmth compared to the spring, where temperatures steadily climbed from a 15°C (60°F) average in March to June's 26°C (79°F). The consistent heat in July signifies a vibrant, lively atmosphere, perfect for enjoying the picturesque coastline and local festivities. As the summer heat peaks, visitors can immerse themselves in the sunshine, enjoying long, lazy days by the water.
In July, Sullivans Island experiences one of its wettest months of the year, with precipitation amounts reaching 171 mm (6.7 in) over approximately 16 days of rainfall. This sharp rise from 144 mm (5.7 in) in June signals a significant increase in summer showers, setting the stage for a lush, vibrant landscape. The pattern continues into August, where precipitation peaks at 197 mm (7.8 in), indicating that the island’s summer is characterized by frequent rain, particularly in these months. This trend of elevated rainfall is essential for maintaining the island's natural beauty, though it also calls for residents and visitors to prepare for the unpredictability of summer storms.
In July, Sullivans Island experiences an increase in humidity, reaching 82%, which reflects its peak summer conditions. This rise follows a consistent pattern from the previous months of June, where humidity stabilized at 78%. The trend showcases a warmer, more muggy atmosphere as the summer progresses, with humidity levels gradually climbing from February through to August. Following July, humidity slightly dips in August at 81%, but remains relatively high, indicating that the summer's sticky embrace lingers. Interestingly, the year ends with November and December bringing back elevated humidity levels of 82% and 84%, respectively, suggesting that even the cooler months in Sullivans Island maintain a certain level of warmth and moisture in the air.
In July, Sullivans Island experiences its peak UV Index, reaching an intense 12, which falls under the extreme exposure category. This marks the third consecutive month with an UV Index of 11 or higher, highlighting the region's intense summer sun. With a rapid burn time of just 10 minutes, this month emphasizes the need for protective measures, especially for those planning outdoor activities. Following the sharp increase in April and May, this trend continues, making it vital for residents and visitors alike to be vigilant about sun safety. As summer progresses, staying informed about the UV Index can help ensure a safe and enjoyable experience outdoors. For more details, visit Sullivans Island UV Index.
UV Risk Categories
July on Sullivans Island shines brightly with an impressive 345 hours of sunshine, making it the sunniest month of the year. This peak in sunlight follows a steady upward trend from the 190 hours recorded in January, demonstrating a gradual escalation as spring blooms into summer. As the months progress, the sun-kissed paradise offers an increasingly vibrant atmosphere, culminating in July's radiant glory. Following this sunny peak, August sees a slight dip to 321 hours, yet still embraces a generous amount of sunlight that continues to illuminate the beach and warm the hearts of its visitors. Overall, the trend clearly reveals Sullivans Island as a summer haven, where long, sun-filled days are the hallmark of its charm.
In Sullivans Island, the likelihood of sunny weather in July sees a dip, with a 36% chance of sunshine, making it one of the less favorable months for basking in warm rays. Interestingly, this is a noticeable decline from the sunnier days of April and May, which boast chances of 57% and 53%, respectively. As we move into the summer, June's 30% forecast takes the plunge, suggesting a trend of mixed weather leading into July. Despite this, the sun seems to reemerge in the fall, particularly in September with a 52% chance, hinting at a return to brighter days. So while July might not offer the sunniest skies, there's hope on the horizon as the seasons transition.
In July, Sullivans Island basks in 14 hours of daylight, maintaining the peak summer brightness initiated in June. This month marks a turning point, as the daylight duration remains consistent with the previous month, highlighting the season's full swing. Following the trend from earlier months, there is a gradual increase from 10 hours in January to the maximum daylight of 14 hours seen in both June and July. As the summer heats up, residents and visitors alike can indulge in the extended daylight, perfect for enjoying the island's splendid beaches and vibrant outdoor activities. Looking ahead, however, as August approaches, daylight begins to retreat, ushering in the slower, cooler days of fall, with daylight hours declining gradually to 13 hours.
In July, Sullivans Island experiences a gentle breeze, with an average wind speed of 4.4 m/s (10 mph), marking a notable dip compared to the more robust winds of the earlier months. Following the summer months’ peak in May and March, which both enjoyed wind speeds of 5.2 m/s (12 mph), July's calmer winds signal a shift towards the slower paces of late summer. This trend continues into August, where the average wind speed drops even further to 3.9 m/s (9 mph). The island's wind patterns reflect a seasonal transition, suggesting that while summertime brings warmth and sunshine, it also invites lighter winds perfect for relaxing beach days.
The weather in Sullivans Island changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of July'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.
July and January present a striking contrast in weather patterns. In July, temperatures soar with a minimum of 22°C (72°F) and an average high of 32°C (89°F), accompanied by high humidity levels at 82%. This peak summer month also sees significant rainfall, with 171 mm (6.7 in) over about 16 days. In contrast, January experiences markedly cooler temperatures, with a minimum of -5°C (24°F) and an average of 12°C (53°F), making it the coldest month of the year. January has much less precipitation at 66 mm (2.6 in) over 8 days, while humidity levels remain slightly elevated at 83%. For a detailed overview of January weather, you can visit Sullivans Island weather in January.
In comparing the weather of July and February, it's clear that these months embody contrasting climates. July experiences much warmer temperatures, with a minimum of 22°C (72°F) and an average high reaching 32°C (89°F), while February's temperatures hover significantly lower, with a minimum of 2°C (36°F) and a maximum of 21°C (70°F). Additionally, July sees significantly more precipitation, totaling 171 mm (6.7 in) across 16 days, compared to February's 91 mm (3.6 in) over 11 days. Humidity levels are relatively similar, with July at 82% and February at 79%, but the overall feel of the weather is distinctly different. For those interested in more specific details about February weather, you can visit Sullivans Island weather in February.
The weather comparison between July and March highlights a significant difference in temperature and precipitation. In July, temperatures soar with a minimum of 22°C (72°F), an average of 27°C (81°F), and a maximum reaching 32°C (89°F). This month sees a considerable amount of rainfall, with 171 mm (6.7 in) spread over 16 days, contributing to a high humidity level of 82%. In contrast, March experiences much cooler conditions, with a minimum temperature of 2°C (36°F), an average of 15°C (60°F), and a maximum of 23°C (74°F). Precipitation is notably lower at 62 mm (2.4 in) over just 7 days, and humidity remains slightly lower at 79%. For those intrigued by the climate specifics of March, more details can be found here: Sullivans Island weather in March.
When comparing the weather in July and April, there's a stark contrast in temperatures and precipitation. July boasts much warmer conditions, with average temperatures reaching 27°C (81°F) and soaring highs of up to 32°C (89°F), while April has a cooler average temperature of 19°C (66°F), peaking at 27°C (81°F). Additionally, July experiences significantly more rainfall, with 171 mm (6.7 in) over 16 days, compared to April's more moderate 105 mm (4.1 in) across just 8 days. Both months also have relatively high humidity, with July at 82% and April at 78%. For more detailed information on April's weather, you can check Sullivans Island weather in April.
In July, the weather is significantly warmer and more humid compared to May, with average temperatures reaching 27°C (81°F) and maximums soaring to 32°C (89°F). In contrast, May experiences milder temperatures, with an average of 23°C (74°F) and a maximum of 31°C (89°F), making it generally more comfortable. Additionally, July sees a much higher amount of precipitation, totaling 171 mm (6.7 in) over 16 days, while May has only 82 mm (3.2 in) across 8 days. Humidity levels also peak in July at 82%, slightly above May's 78%. For more specific details on May weather, check out Sullivans Island weather in May.
July generally sees warmer temperatures than June, with a minimum of 22°C (72°F) compared to June's 18°C (64°F). The average temperature in July reaches 27°C (81°F), slightly higher than June's average of 26°C (79°F). Both months experience similar maximum temperatures, peaking at around 32°C (90°F). However, July is wetter, with 171 mm (6.7 in) of precipitation over 16 days, compared to June’s 144 mm (5.7 in) over 17 days. Additionally, July's humidity is higher at 82%, making the air feel muggier than in June, which has a humidity level of 78%. For a closer look at weather patterns, check out Sullivans Island weather in June.
In comparing the weather between July and August, both months exhibit similar average temperatures, with July experiencing a minimum of 22°C (72°F) and a maximum of 32°C (89°F), while August sees a slightly higher minimum of 23°C (73°F) but a maximum of 31°C (89°F). Precipitation increases in August, with 197 mm (7.8 in) over 21 days compared to July's 171 mm (6.7 in) across 16 days, indicating a wetter month. Humidity levels remain consistent, with July at 82% and August at 81%, maintaining the overall tropical feel. For more detailed information, you can check Sullivans Island weather in August.
In July, the weather is characterized by warmer temperatures, with minimums around 22°C (72°F) and average highs reaching up to 32°C (89°F). This month also sees significant rainfall, with 171 mm (6.7 in) spread over 16 days and relatively high humidity at 82%. In contrast, September offers slightly cooler temperatures, with a minimum of 16°C (61°F) and a similar maximum of 32°C (90°F). Although the average temperature dips to 26°C (79°F), precipitation increases slightly to 188 mm (7.4 in) over 14 days, with humidity remaining comparable at 81%. For more detailed insights, check out Sullivans Island weather in September.
In comparing the weather between July and October, a noticeable shift occurs as the summer heat gives way to the cooler autumn months. July experiences warmer temperatures with a minimum of 22°C (72°F) and an average of 27°C (81°F), peaking at 32°C (89°F), along with high humidity at 82%. This month also sees significant rainfall, with over 171 mm (6.7 in) spread across 16 days. In contrast, October boasts a much cooler climate with a minimum temperature of 7°C (46°F) and an average of 23°C (73°F), reaching a maximum of 29°C (85°F). Precipitation decreases sharply to 85 mm (3.4 in) over just 10 days, while humidity slightly lowers to 78%. For a more detailed look at the conditions specific to this month, you can visit Sullivans Island weather in October.
In July, the weather is characterized by warm temperatures, with a minimum of 22°C (72°F) and an average of 27°C (81°F), peaking at a high of 32°C (89°F). It's a humid month, with humidity levels at 82% and considerable rainfall, totaling 171 mm (6.7 in) over 16 days. In contrast, November brings a significant drop in temperature, with averages around 16°C (62°F) and maximums reaching 26°C (79°F). The minimum temperature in November can dip to 3°C (38°F), and it experiences less precipitation at 103 mm (4.1 in) over only 8 days. Despite the lowered temperatures, humidity remains consistent at 82%. For more details on the weather in November, visit Sullivans Island weather in November.
July and December present starkly contrasting weather patterns. In July, temperatures are much warmer, with minimums around 22°C (72°F) and maximums reaching up to 32°C (89°F), averaging 27°C (81°F). This month is characterized by higher humidity at 82% and significant rainfall, totaling 171 mm over 16 days. In contrast, December brings much cooler conditions, with minimum temperatures dropping to 0°C (33°F) and an average of 13°C (56°F), peaking at 22°C (72°F). Although December sees less rainfall at 141 mm over 10 days, humidity remains similar at 84%. For more detailed insights into December weather, check Sullivans Island weather in December.
In July, Sullivans Island experiences a peak in summer warmth, characterized by higher temperatures and increased humidity that set it apart from other months. The average temperature soars to a balmy 27°C (81°F), making it ideal for beachgoers. However, July also brings a noticeable uptick in precipitation, with about 16 days of rain contributing to a total of 171 mm (6.7 in), which can lead to a humid atmosphere. This combination of warmth and moisture creates a vibrant, tropical feel unique to the heart of summer. For more details on the weather patterns throughout the year, visit Sullivans Island Climate.