Last updated: February 24, 2025
In July, Nantucket experiences a delightful summer climate characterized by a maximum temperature of 24°C (76°F) and an average of 20°C (67°F). The minimum temperature hovers around a comfortable 15°C (59°F), making it ideal for outdoor activities. While the island enjoys warm weather, it also sees precipitation totaling 64 mm (2.5 in) over approximately 8 days, contributing to an average humidity level of 76%. This combination of warmth, occasional showers, and high humidity creates a lush and vibrant atmosphere, perfect for exploring the scenic beauty of Nantucket.
In July, Nantucket basks in the warmth of summer, with temperatures ranging from a minimum of 15°C (59°F) to a pleasant maximum of 24°C (76°F). This month marks a significant rise in warmth compared to the cooler spring months, showcasing an average temperature of 20°C (67°F)—a delightful invitation for beachgoers and outdoor activities. With each passing month leading up to July, the island transitions from the chill of winter, where January's icy lows dip to -13°C (9°F), to this sun-kissed peak, emphasizing Nantucket's charm as a summer getaway. The mild evenings paired with comfortable daytime highs create the perfect backdrop for enjoying the island's scenic beauty and vibrant cultural scene.
In July, Nantucket experiences a marked decrease in precipitation, with only 64 mm (2.5 in) recorded over 8 days. This is the driest month of the year, significantly lower than the wetter months preceding it, such as May and June. The trend continues into August, where precipitation slightly rises again to 98 mm (3.9 in), indicating a shift back towards more typical summer weather. The relative dryness of July provides a brief respite, allowing visitors and residents to enjoy the island's stunning beaches and outdoor activities before the precipitation levels increase in the fall months. This seasonal pattern highlights the island's unique climate, balancing wet and dry spells throughout the year.
In Nantucket, July brings a relative humidity of 76%, marking a subtle dip compared to the previous months. This trend showcases a gradual decline from January's 84% humidity, steadily decreasing as spring gives way to summer. After May, which recorded the lowest humidity at 75%, July's levels are consistent with August, hinting at a comfortable climate ideal for beachgoers. Interestingly, humidity levels are notably higher in the winter months, peaking at 84% in January and February. Overall, Nantucket experiences a slight decrease in humidity during the summer, contributing to a pleasant coastal atmosphere perfect for outdoor activities.
In July, Nantucket experiences a peak UV Index of 10, signaling a period of intense sun exposure categorized as very high. This trend of elevated UV levels carries over from June, where the Index is also 10, emphasizing the need for heightened awareness regarding sun safety during the summer months. As temperatures rise, previous months like April and May showcase a gradual increase from a moderate UV Index of 8 and 9 respectively, indicating the approach of peak sun intensity. Visitors and locals alike should remain vigilant, with a burn time of just 15 minutes under these conditions. For detailed insights on sun exposure throughout the year, explore Nantucket UV Index.
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In Nantucket, July shines brightly with 342 hours of sunshine, marking the peak of summer's radiant embrace. This month showcases a remarkable upward trend in sunlight hours, building from 134 hours in January and steadily climbing throughout the spring. As the days lengthen, June offers 319 hours, but July captures the essence of summer, inviting both locals and visitors to bask in its warmth. Following July, August sees a slight dip to 327 hours, yet it remains a testament to Nantucket's sun-filled allure. This progression not only highlights the peak of sunny summer days but also reveals an inviting atmosphere that beckons exploration and relaxation during the heart of the season.
In July, Nantucket enjoys a 42% chance of sunny weather, a figure that reflects a moderate likelihood of clear skies amidst the summer backdrop. While this percentage is slightly above the chances observed in late spring and early summer months, such as June, which sits at 37%, it doesn't quite match the sun-filled optimism of September, boasting a robust 55%. Notably, the island transitions from the relatively bleak winter months—where the chance of sunshine dips as low as 27% in February—to more favorable weather in late summer and fall. As July rolls around, visitors can expect a pleasant mix of sun and cloud, inviting beachgoers and nature lovers to savor the island's beauty, albeit with a modest chance of rain.
As July unfolds in Nantucket, daylight reaches a vibrant peak, offering approximately 14 hours of sunshine—a slight decrease from the previous month but still among the longest days of the year. This summer month reflects a trend of gradually increasing daylight from the depths of winter, where January only saw 9 hours. Following a steady rise through spring, July's daylight envelops the island in a warm embrace, creating the perfect backdrop for outdoor activities and breathtaking sunsets. As summer progresses into August, the days begin to shorten slightly once again, hinting at the seasonal transition ahead. With its rich 14 hours of daylight, July is a time when Nantucket truly comes alive under the sun, showcasing the best of summer's potential.
In July, the wind in Nantucket experiences a gentle lull, with average speeds dropping to 5.4 m/s (12 mph), marking a noticeable decline from the breezier months of the spring and early summer. This trend continues into August with an even lighter breeze of 5.2 m/s (12 mph). As the summer draws to a close, wind speeds gradually pick up in September, returning to 6.4 m/s (14 mph). Overall, the data reveals a seasonal pattern where the winds ease as the temperatures rise, creating a serene atmosphere perfect for summer relaxation and coastal activities.
The weather in Nantucket 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 Nantucket and find detailed weather information for every month.
In July, the weather in Nantucket boasts a mild climate with average temperatures ranging from 15°C (59°F) to a comfortable 24°C (76°F), accompanied by moderate humidity at 76% and relatively light rainfall of 64 mm over 8 days. In stark contrast, January experiences significantly colder temperatures, with averages between -13°C (9°F) and 13°C (55°F), making it a much chillier time of year. The winter month also sees higher precipitation levels of 96 mm across 10 days and increased humidity at 84%. For more detailed information, you can check out Nantucket weather in January.
In July, temperatures in Nantucket are generally mild, with minimums around 15°C (59°F) and average highs reaching up to 24°C (76°F). The weather is relatively pleasant, with average humidity at 76% and only about 64 mm (2.5 in) of precipitation over 8 days. In contrast, February presents a starkly different climate, characterized by much colder temperatures, with a minimum of -10°C (15°F) and an average high of only 13°C (55°F). Precipitation also increases during this winter month, totaling 127 mm (5.0 in) over 13 days, along with higher humidity levels at 84%. For more detailed information, you can check Nantucket weather in February.
In comparing the weather of July and March, we see significant differences in temperature and precipitation. July enjoys a mild climate with temperatures ranging from a minimum of 15°C (59°F) to a maximum of 24°C (76°F), while March experiences much colder conditions, with temperatures going as low as -7°C (19°F) and peaking at just 12°C (53°F). In terms of precipitation, March is wetter, with 114 mm (4.5 in) over 11 days, compared to July's 64 mm (2.5 in) over 8 days. Additionally, humidity levels are slightly higher in March at 82%, compared to July's 76%. For more detailed information, you can check Nantucket weather in March.
When comparing the weather in April and July, it's clear that July is significantly warmer, with average temperatures reaching around 20°C (67°F), compared to April's chilly average of just 7°C (45°F). July experiences a milder amount of precipitation at 64 mm (2.5 in) over 8 days, whereas April sees a wetter climate with 127 mm (5.0 in) of rain spread across 12 days. Additionally, humidity levels are slightly lower in July at 76%, compared to April's 79%. For a more detailed look at April weather, consider visiting Nantucket weather in April.
When comparing the weather in July and May, July enjoys significantly warmer temperatures, with averages reaching around 20°C (67°F) and maximums of up to 24°C (76°F), while May's temperatures are much cooler, with an average of 11°C (51°F) and a maximum of only 16°C (62°F). Additionally, July experiences less precipitation, totaling 64 mm (2.5 in) over 8 days, compared to May's 130 mm (5.1 in) over 12 days. Despite the slightly higher humidity in July at 76%, it remains quite comparable to May's 75%. For a more detailed look at May's conditions, you can check Nantucket weather in May.
In comparison to June, July shows a notable increase in temperatures, with minimums rising from 10°C (50°F) in June to 15°C (59°F) in July, and average temps climbing from 15°C (60°F) to 20°C (67°F). While both months experience some rainfall, July sees slightly less precipitation at 64 mm (2.5 in) over 8 days, compared to June's 83 mm (3.2 in) over 10 days. Humidity levels remain similar, with July at 76% and June at 78%, suggesting that while it gets warmer in July, the air remains just as moist. For a more detailed look at June's climate conditions, check out Nantucket weather in June.
In July, temperatures typically range from a minimum of 15°C (59°F) to a maximum of 24°C (76°F), with an average temperature of 20°C (67°F). The month experiences around 64 mm (2.5 in) of precipitation over 8 days, accompanied by a humidity level of 76%. In contrast, August sees a slight increase in temperatures, with a minimum of 16°C (62°F) and an average of 21°C (70°F), while maintaining the same maximum of 24°C (76°F). However, August is wetter, with precipitation rising to 98 mm (3.9 in) over the same number of rain days. Despite these changes, humidity levels remain consistent at 76%. For more detailed insights, you can check Nantucket weather in August.
In comparing the weather of July and September, July tends to be slightly warmer, with average temperatures around 20°C (67°F) and a maximum of 24°C (76°F), while September's average dips to 19°C (66°F) with a maximum of 23°C (73°F). Precipitation is notably higher in September, totaling 122 mm (4.8 in) over 10 days, compared to July's 64 mm (2.5 in) over 8 days. Humidity levels are quite similar, with July at 76% and September slightly lower at 75%. For more detailed information about the weather in September, you can refer to Nantucket weather in September.
In comparing the weather of July and October, July enjoys warmer temperatures with a minimum of 15°C (59°F) and a comfortable average of 20°C (67°F), peaking at 24°C (76°F). In contrast, October sees a noticeable drop in temperatures, with a minimum of 5°C (41°F) and an average of 15°C (60°F), even though it can still reach highs of 22°C (71°F). Precipitation levels also differ significantly; July receives 64 mm (2.5 in) over about 8 days, while October experiences a much wetter month with 162 mm (6.4 in) across 12 rainy days. Humidity remains relatively stable, hovering around 76% in July and slightly lower at 75% in October. For more detailed information on October weather specifically, you can check Nantucket weather in October.
In July, the weather is typically mild with temperatures ranging from a minimum of 15°C (59°F) to a maximum of 24°C (76°F), creating a pleasant average of 20°C (67°F). The month experiences around 64 mm (2.5 in) of precipitation over about 8 days and maintains a humidity level of 76%. In contrast, November ushers in cooler temperatures, with a minimum of -5°C (24°F) and a maximum of 19°C (66°F), averaging around 10°C (50°F). This month sees increased rainfall, with 115 mm (4.5 in) of precipitation over 10 days and slightly higher humidity at 80%. For a closer look at what to expect during this time of year, check out Nantucket weather in November.
July and December offer starkly contrasting weather conditions. In July, temperatures range from a minimum of 15°C (59°F) to a pleasant average of 20°C (67°F), with highs reaching 24°C (76°F). This summer month typically experiences about 64 mm (2.5 in) of precipitation over 8 days and boasts a humidity level of 76%. In contrast, December brings colder temperatures, with a minimum of -9°C (16°F), an average of just 5°C (42°F), and a maximum of 16°C (61°F). The winter month sees significantly higher precipitation at 132 mm (5.2 in) spread over approximately 12 days, coupled with an increase in humidity at 80%. For more information on December weather specifics, visit Nantucket weather in December.
As summer peaks, July weather in Nantucket offers a delightful blend of mild temperatures and refreshing ocean breezes, setting it apart from the more variable months of spring and autumn. With average highs reaching 24°C (76°F) and a comfortable average of 20°C (67°F), July invites visitors to enjoy outdoor activities without the discomfort of excessive heat. While occasional rain showers contribute to the overall 64 mm of precipitation over 8 days, they are typically short-lived, allowing for plenty of sunshine in between. The humidity, sitting at a moderate 76%, adds a touch of warmth to the summer days, but overall, July is a beautiful time to experience the charm of Nantucket. To dive deeper into the island's climate patterns, visit Nantucket Climate.