May Weather in Nantucket, United States

Last updated: February 24, 2025

In Nantucket, the month of May heralds the transition into warmer days, with temperatures reaching a maximum of 16°C (62°F) and an average of 11°C (51°F). The weather, while generally mild, can still be brisk with a minimum temperature of 5°C (41°F). Visitors can anticipate some precipitation, as 130 mm (5.1 in) of rain falls over approximately 12 days, contributing to a humidity level of 75%. This blend of cool breezes and occasional showers creates a refreshing maritime atmosphere, perfect for exploring the island’s scenic beauty.

May Temperature in Nantucket

May marks a refreshing transition in Nantucket, as temperatures begin to rise after the chilly months of winter and early spring. With minimum temperatures averaging 5°C (41°F) and a comfortable average of 11°C (51°F), the island welcomes the mildness of spring. The maximum temperature climbs to 16°C (62°F), signaling the approach of summer and offering a delightful backdrop for outdoor activities. This increase in warmth not only invites locals and tourists to explore the scenic landscapes but also indicates a steady upward trend in temperatures as the year progresses, paving the way for the vibrant summer months ahead.

May Weather in Nantucket: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Nantucket, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec373739455160676966595042
Data source: Temperature data for Nantucket generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Nantucket

May in Nantucket brings a steady uptick in precipitation, with 130 mm (5.1 in) of rain falling over 12 days. This marks a slight increase from the previous months, as April also recorded 127 mm but with the same number of rainy days. The trend reflects a transitional period where spring blossoms nourish the island, preparing it for the summer ahead. Compared to the heavier rain seen in the colder months, May strikes a balance, providing consistent moisture while keeping the chill at bay. As the season shifts, these seasonal showers contribute to the lush landscapes that Nantucket is celebrated for, creating a vibrant backdrop for both locals and visitors alike.

May Precipitation Trends in Nantucket

The chart displays monthly precipitation patterns in Nantucket, with values for each month alongside May's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec96127114127130836498122162115132
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Nantucket

As spring blooms into summer, May in Nantucket showcases a transition in humidity levels, dipping to 75% from the higher averages of previous months. This decline marks a notable change from the 84% humidity seen at the start of the year, reflecting the island's shift toward drier conditions. Following April's humidity of 79%, May offers a refreshing respite, making it one of the more comfortable months for residents and visitors alike. As the season progresses into June, humidity begins to rise again, hinting at the return of the more oppressive coastal moisture typical of the summer months. Overall, May stands out as a sweet spot of moderate humidity, providing a perfect backdrop for outdoor activities amid Nantucket's scenic beauty.

May Average Humidity in Nantucket

This chart illustrates the average monthly humidity levels in Nantucket, with May's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how May's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%82%79%75%78%76%76%76%75%80%80%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Nantucket

As spring transitions into summer in Nantucket, May brings a very high UV Index of 9, signaling increasing sun intensity and a notable shift in exposure risk. Compared to the previous months, where the UV Index hovered between moderate to high, May demands greater caution, with a burn time of just 15 minutes for unprotected skin. This pattern of escalating UV levels continues into June and July, where the Index peaks at 10, suggesting that sun safety measures are more crucial than ever. With the warm weather beckoning outdoor activities, it’s vital to stay informed and protected. For more detailed information, visit Nantucket UV Index.

Maximum UV Index Levels in Nantucket for May

The chart shows the monthly maximum UV Index (UVI) for Nantucket in May, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec35689101098642
Data source: Nantucket May UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

May Sunshine in Nantucket

As spring gracefully transitions into summer, May emerges as a highlight in Nantucket's annual weather calendar, basking in 299 hours of glorious sunshine. This marks a significant increase from the preceding months, particularly April, which offers just 244 hours of sunlight, setting the stage for the warmer days ahead. The trend continues into June and July, where sunshine peaks at 319 and 342 hours respectively, showcasing Nantucket's shift towards a vibrant, sun-drenched summer. With each passing month from January onward, the island gradually shakes off the winter chill, embracing longer days and brighter skies, culminating in an inviting atmosphere that beckons both locals and visitors to revel in the beauty of May.

Monthly Sunshine Duration in Nantucket: May Highlighted

The May sunshine duration represents the total number of hours Nantucket experiences direct sunlight during the month of May, excluding cloudy or obstructed periods. This chart compares the sunshine duration of May with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec134h174h256h244h299h319h342h327h278h238h200h156h
Data source: Nantucket May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Nantucket During May

In Nantucket, United States, the chances of experiencing sunny weather in May stand at 43%, which positions it favorably in comparison to the earlier spring months. As March sees a significant 56% chance of sunshine, the optimism slightly dips in April to 47%, before stabilizing in May. This trend suggests that while the sunny days of spring may be dwindling, May offers a decent opportunity for pleasant weather. Following May, June sees a slight decrease to 37%, indicating a seasonal shift as the island transitions into summer. Overall, those looking to enjoy the early warmth of May can reasonably expect a mix of sunny moments, maintaining Nantucket's charm before the peak tourist season begins.

Percentage of Sunny Days in May in Nantucket

The chart illustrates the percentage of sunny days in Nantucket throughout the year, with May highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Nantucket experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec36%27%56%47%43%37%42%39%55%46%51%27%
Data source: Nantucket May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Nantucket in May

As spring blossoms fully into summer, Nantucket experiences a delightful increase in daylight duration throughout May, offering 14 hours of sunshine that welcomes the warm season. This upward trend begins in January with just 9 hours and steadily climbs, highlighting the gradual lengthening of days. By the time April arrives, daylight reaches 13 hours, setting the stage for May's radiant abundance. As summer approaches in June, daylight peaks at 15 hours, creating the perfect backdrop for outdoor activities and festivities. The transition from the shorter winter days to the longer, sun-filled hours of summer encapsulates the vibrant energy of Nantucket's spring and early summer months.

Average Daylight Hours in Nantucket for May

The chart illustrates the variation in daylight duration in Nantucket throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 34m10h 37m11h 58m13h 20m14h 30m15h 5m14h 46m13h 44m12h 24m11h 2m9h 50m9h 14m
Data source: Nantucket daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Nantucket

In Nantucket, the month of May brings a refreshing shift in wind patterns, with average wind speeds dropping to 6.6 m/s (15 mph), showcasing a gradual decline from the earlier months of the year. This decrease from the 8.2 m/s (18 mph) recorded in January marks a transition into the calmer days of late spring. As the warmer months approach, particularly with June and July averaging even lower wind speeds, May stands out as a bridge between the brisk winds of winter and the more gentle breezes of summer. The trend highlights how Nantucket's unique coastal climate creates a dynamic interplay of seasonal winds, making May a pleasant time for outdoor activities and exploration.

Average May Wind Speed in Nantucket

The chart displays monthly wind speed patterns in Nantucket, with values for each month shown alongside May's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how May's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec8.28.07.97.56.6 m/s6.55.45.26.47.37.77.6
Data source: Nantucket May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Nantucket Compares to Other Months

The weather in Nantucket changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of May'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.

When comparing the weather in May and January, the differences are quite pronounced. May enjoys milder temperatures, with a minimum of 5°C (41°F) and an average of 11°C (51°F), while January is much colder, featuring a minimum of -13°C (9°F) and an average of just 3°C (38°F). Precipitation levels in May are higher, with 130 mm (5.1 in) falling over approximately 12 days, compared to January's 96 mm (3.8 in) over 10 days. Additionally, May's humidity is around 75%, which is lower than January’s humidity of 84%. For more specific details on January weather, you can check Nantucket weather in January.

When comparing the weather in May to that of February, significant differences emerge. In May, temperatures progressively warm up, with averages around 11°C (51°F) and a maximum of 16°C (62°F), while February experiences much colder conditions, averaging only 3°C (38°F) and dipping as low as -10°C (15°F). Precipitation levels are relatively similar, with May accumulating 130 mm (5.1 in) over approximately 12 days compared to February's 127 mm (5.0 in) over 13 days. Additionally, humidity tends to be lower in May at 75%, contrasted with the higher humidity of 84% found in February. For more insights on February weather in Nantucket, visit Nantucket weather in February.

When comparing the weather in May and March, there are notable differences in temperature and humidity. May features milder temperatures, ranging from a minimum of 5°C (41°F) to a maximum of 16°C (62°F), while March experiences cooler conditions with temperatures dipping as low as -7°C (19°F) and peaking at 12°C (53°F). Additionally, May has slightly more precipitation, with 130 mm (5.1 in) over 12 days compared to March's 114 mm (4.5 in) over 11 days. Humidity levels are also higher in March at 82%, compared to 75% in May. For more detailed information about March weather, you can refer to Nantucket weather in March.

In comparing the weather between April and May, it's evident that May offers a slight increase in temperatures, with averages rising from 7°C (45°F) in April to 11°C (51°F) in May. Additionally, May experiences warmer maximum temperatures of up to 16°C (62°F), compared to April's maximum of 13°C (56°F). Precipitation levels are fairly similar, with May receiving 130 mm (5.1 in) over 12 days, just slightly more than April's 127 mm (5.0 in) on the same number of days. Humidity also remains high in both months, but is slightly lower in May at 75%, compared to 79% in April. For more detailed insights, you can refer to Nantucket weather in April.

May and June exhibit notable differences in weather patterns. In May, temperatures range from a chilly minimum of 5°C (41°F) to a mild maximum of 16°C (62°F), with an average of 11°C (51°F). The month is relatively wet, receiving 130 mm (5.1 in) of precipitation over 12 days and a humidity level of 75%. In contrast, June enjoys warmer temperatures, starting at a comfortable minimum of 10°C (50°F) and peaking at 21°C (70°F), averaging 15°C (60°F). Precipitation decreases to 83 mm (3.2 in) over 10 days, while humidity slightly rises to 78%. For more details on June conditions, you can explore Nantucket weather in June.

May and July showcase distinct weather patterns, reflecting the transition from spring to summer. In May, temperatures are cooler with a minimum of 5°C (41°F) and an average around 11°C (51°F), peaking at 16°C (62°F). This month experiences significant rainfall, accumulating 130 mm (5.1 in) over approximately 12 days, while humidity levels hover around 75%. In contrast, July boasts milder temperatures with a minimum of 15°C (59°F) and an average of 20°C (67°F), reaching a maximum of 24°C (76°F). Precipitation in July is less, totaling 64 mm (2.5 in) over just 8 days, and humidity remains similar at 76%. For more detailed information, you can check Nantucket weather in July.

May and August present contrasting weather patterns. In May, temperatures range from a chilly minimum of 5°C (41°F) to a comfortable maximum of 16°C (62°F), with an average temperature of 11°C (51°F). The month is quite wet, receiving about 130 mm (5.1 in) of precipitation over 12 days and exhibiting a humidity level of 75%. In contrast, August enjoys milder conditions, with temperatures starting at a minimum of 16°C (62°F) and peaking at 24°C (76°F), averaging around 21°C (70°F). This summer month experiences less rainfall, totaling 98 mm (3.9 in) over just 8 days, while humidity remains slightly elevated at 76%. For more details about the weather in August, you can check Nantucket weather in August.

In May, temperatures are generally cooler, with nighttime lows dropping to around 5°C (41°F) and daytime highs averaging 16°C (62°F), while September sees milder conditions, with minimum temperatures around 13°C (56°F) and maximums reaching up to 23°C (73°F). Both months experience similar humidity levels at 75%, but May tends to be wetter, with 130 mm (5.1 in) of precipitation over 12 days, compared to September's 122 mm (4.8 in) over just 10 days. For more details on the weather in September specifically, you can check out Nantucket weather in September.

In May, the weather tends to be cooler, with average temperatures ranging from a minimum of 5°C (41°F) to a maximum of 16°C (62°F). The month sees a considerable amount of precipitation, totaling 130 mm (5.1 in) over about 12 days, and the humidity remains high at 75%. In contrast, October experiences warmer temperatures with an average of 15°C (60°F) and highs reaching 22°C (71°F). Precipitation increases slightly to 162 mm (6.4 in), also spread over 12 days, while humidity stays consistent at 75%. For more details on what to expect this fall, check out Nantucket weather in October.

May and November exhibit distinct weather characteristics that reflect the transition between spring and autumn. In May, temperatures typically range from a minimum of 5°C (41°F) to a maximum of 16°C (62°F), with an average of 11°C (51°F). This month experiences about 130 mm (5.1 in) of precipitation over 12 days and maintains a humidity level of 75%. In contrast, November sees slightly cooler temperatures, with a minimum of -5°C (24°F) and a maximum of 19°C (66°F), averaging 10°C (50°F). Precipitation is somewhat lower at 115 mm (4.5 in) over 10 days, accompanied by increased humidity at 80%. For a closer look at what to expect, check out this resource: Nantucket weather in November.

In May, temperatures in Nantucket range from a minimum of 5°C (41°F) to a maximum of 16°C (62°F), with an average temperature of 11°C (51°F). The month experiences around 130 mm (5.1 in) of precipitation over approximately 12 days, coupled with a humidity level of 75%. In contrast, December sees much colder temperatures, with a minimum of -9°C (16°F) and an average of 5°C (42°F), while the maximum remains similar at 16°C (61°F). Precipitation in December is slightly higher at 132 mm (5.2 in) over the same number of days, but humidity rises to 80%. For more details on the December climate, you can check Nantucket weather in December.

Compare Nantucket's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in Nantucket

As spring unfolds in Nantucket, May brings a refreshing transition from the cool grip of winter to the warmth of early summer. The mild average temperatures, hovering around a comfortable 11°C (51°F), invite both locals and visitors to enjoy outdoor activities amid the stunning coastal scenery. With 130 mm of precipitation spread across 12 days, the month sees a mix of sun and rain, adding a lush vibrancy to the island's landscape. The relative humidity at 75% helps maintain the refreshing ocean breeze, offering an enjoyable escape from the more sweltering summer months ahead. To explore more about Nantucket's weather patterns throughout the year, check out Nantucket Climate.