May Weather in Sag Harbor, United States

Last updated: February 24, 2025

In May, Sag Harbor experiences a mild maritime climate characterized by pleasant temperatures and significant rainfall. With a maximum of 20°C (69°F) and an average of 12°C (54°F), days are generally comfortable, while the minimum can dip to 4°C (39°F), particularly in the early mornings. The month sees an average precipitation of 129 mm (5.1 in) spread over about 13 days, leading to a humidity level of approximately 75%. This combination of warmth and moisture contributes to the region's lush greenery and vibrant spring atmosphere, making it an appealing destination for outdoor enthusiasts and nature lovers alike.

May Temperature in Sag Harbor

As May arrives in Sag Harbor, the transition to spring is palpable, marked by a delightful increase in temperatures. The month begins with a minimum of 4°C (39°F), climbing to a comfortable 20°C (69°F) at its peak, with an average of 12°C (54°F). This upward trend from April's chill, where temperatures ranged from 0°C (33°F) to 16°C (61°F), is a clear indication of the region shaking off the cold grip of winter. By this time of year, residents and visitors can enjoy milder evenings and sunny afternoons, making May an ideal period for outdoor activities and exploration. The consistent warming signals a beautiful shift towards summer, inviting all to bask in the charm of Sag Harbor's blossoming landscapes.

May Weather in Sag Harbor: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Sag Harbor, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec363739465464727368615042
Data source: Temperature data for Sag Harbor generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Sag Harbor

In May, Sag Harbor experiences a moderate precipitation total of 129 mm (5.1 in) spread over 13 days, maintaining the trend of increased rainfall typical of the spring season. This volume is slightly less than April's 137 mm (5.4 in), suggesting a gentle transition towards drier conditions as summer approaches. Despite the decrease in total rainfall compared to the previous month, the number of precipitation days remains consistent, reflecting a reliable pattern of rain that nurtures the blooming landscapes. As the region gears up for warmer days, the gradual decline in precipitation hints at the arrival of sunnier skies, promising a vibrant and lush environment as nature fully embraces the season.

May Precipitation Trends in Sag Harbor

The chart displays monthly precipitation patterns in Sag Harbor, 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.
JanFebMarAprMayJunJulAugSepOctNovDec89123113137129729910399161113147
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

May Humidity in Sag Harbor

As spring gives way to summer in Sag Harbor, May sees a notable drop in humidity, falling to 75%, the lowest level since early fall. This decrease reflects a gradual trend of diminishing humidity beginning in April, when levels reached 79%. While most of the year experiences high humidity, particularly in the winter months hovering around 84%, May ushers in a refreshing shift that paves the way for warmer days ahead. As June approaches, humidity levels will subtly rise again, emphasizing the area's characteristic fluctuation throughout the seasons. This gentle ebb and flow of humidity not only shapes the local climate but also enhances the vibrant summer experiences that Sag Harbor has to offer.

May Average Humidity in Sag Harbor

This chart illustrates the average monthly humidity levels in Sag Harbor, 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 Sag Harbor

As summer approaches, Sag Harbor sees a notable surge in UV radiation, with May registering a UV Index of 9, indicating a very high exposure category. This sharp increase from April's 8 reflects the intensifying sun, mandating that outdoor enthusiasts be cautious with a burn time of just 15 minutes. Following the trend, June and July will peak with an index of 10, suggesting that protective measures are crucial for skin health. As the months progress, August will slightly ease back to 9, but the very high exposure persists. For the upcoming sunny days, it's essential to stay informed and protected. To explore the UV Index and details for each month, visit Sag Harbor UV Index.

Maximum UV Index Levels in Sag Harbor for May

The chart shows the monthly maximum UV Index (UVI) for Sag Harbor 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: Sag Harbor 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 Sag Harbor

May shines brightly in Sag Harbor, United States, with 291 hours of glorious sunshine, marking a delightful peak as the days grow longer and warmer. This month experiences a significant boost from the preceding April's 250 hours, showcasing the encouraging trend of increasing sunshine as spring transitions into summer. The gradual climb from a modest 153 hours in January to May's vibrant display illustrates nature's awakening, with sunshine steadily intensifying, culminating in the sun-drenched days of summer that follow. As temperatures rise and the landscape bursts into full bloom, May stands out as a particularly luminous month in Sag Harbor, inviting residents and visitors alike to bask in its warmth and beauty.

Monthly Sunshine Duration in Sag Harbor: May Highlighted

The May sunshine duration represents the total number of hours Sag Harbor 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.
JanFebMarAprMayJunJulAugSepOctNovDec153h185h261h250h291h321h349h327h281h229h208h177h
Data source: Sag Harbor May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Sag Harbor During May

In Sag Harbor, the likelihood of sunny weather tends to fluctuate throughout the year, with May offering a moderate 45% chance of sunshine. This mirrors the patterns seen in April and July, both at 49%, indicating a slight decrease as spring transitions into summer. Interestingly, the sunshine probability is notably higher in March at 59%, suggesting that the tail end of winter can occasionally surprise us with brighter days. As the months progress to June with its 41% chance, the overall trend reveals an inconsistent yet intriguing dance of sunshine, making each sunny day in May feel like a delightful treasure amidst the variable skies.

Percentage of Sunny Days in May in Sag Harbor

The chart illustrates the percentage of sunny days in Sag Harbor 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 Sag Harbor experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec49%31%59%49%46%41%45%35%49%46%53%32%
Data source: Sag Harbor May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Sag Harbor in May

As spring blossoms into summer, Sag Harbor basks in an energizing increase in daylight duration. In May, the average daylight stretches to an impressive 14 hours, marking a significant shift from the shorter days of earlier months. This gradual ascent, starting with just 9 hours in January, progresses steadily through the spring, culminating in June's peak of 15 hours. The pattern reveals a rhythmic cycle where each month builds upon the last, inviting residents and visitors alike to relish longer evenings and vibrant outdoor activities. By mid-summer, daylight begins to wane slightly, with the 14 hours of July transitioning back into the 12 hours of September, yet the lingering warmth of May’s brilliance continues to resonate throughout the season.

Average Daylight Hours in Sag Harbor for May

The chart illustrates the variation in daylight duration in Sag Harbor throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 35m10h 38m11h 58m13h 20m14h 29m15h 3m14h 44m13h 43m12h 24m11h 3m9h 52m9h 15m
Data source: Sag Harbor daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Sag Harbor

In Sag Harbor, the month of May marks a subtle transition in wind patterns, with average speeds dipping to 6.0 m/s (14 mph), a slight decrease from the breezier early spring months. During April, strong gusts at 6.2 m/s (14 mph) still linger, but by May, the winds begin to mellow, setting the stage for the summer months ahead. This trend continues into June, where the average wind speed further decreases to 5.6 m/s (13 mph), hinting at the calmer, more serene conditions typical of the summer season. Interestingly, after a steady decline throughout the summer, wind speeds pick up slightly in the fall, reflecting a dynamic climatic shift that characterizes this picturesque coastal region.

Average May Wind Speed in Sag Harbor

The chart displays monthly wind speed patterns in Sag Harbor, 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.
JanFebMarAprMayJunJulAugSepOctNovDec7.37.36.96.26.0 m/s5.64.84.96.16.76.86.6
Data source: Sag Harbor May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Sag Harbor Compares to Other Months

The weather in Sag Harbor 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 Sag Harbor and find detailed weather information for every month.

When comparing the weather in May and January, it’s clear that these months present markedly different climates. May experiences milder temperatures, with an average of 12°C (54°F), reaching up to a maximum of 20°C (69°F), while January is significantly colder, averaging around 2°C (37°F) and peaking at 13°C (56°F). Additionally, May brings about 129 mm (5.1 in) of precipitation over 13 days, whereas January has less precipitation at 89 mm (3.5 in) across only 9 days. Humidity levels in May are around 75%, slightly lower than the higher humidity of 84% typical in January. For a more detailed look at January weather, you can visit Sag Harbor weather in January.

May and February present starkly contrasting weather conditions. In May, temperatures range from a chilly minimum of 4°C (39°F) to a pleasant maximum of 20°C (69°F), with an average of 12°C (54°F). The month sees around 129 mm (5.1 in) of precipitation over 13 days, while humidity hovers at 75%. In contrast, February is much colder, with temperatures dipping as low as -12°C (11°F) and averaging just 3°C (37°F). Although February experiences slightly less precipitation at 123 mm (4.8 in) over 11 days, it has higher humidity levels at 84%. For more detailed information, check out Sag Harbor weather in February.

When comparing the weather in March and May, noticeable differences emerge. March experiences colder temperatures, with a minimum of -7°C (20°F) and an average of only 4°C (39°F), while May offers a milder range, starting at 4°C (39°F) and averaging 12°C (54°F). Precipitation levels are somewhat comparable, with March totaling 113 mm (4.5 in) over 10 days, while May sees a slightly higher amount of 129 mm (5.1 in) across 13 days. Additionally, humidity is higher in March at 82%, compared to May's 75%. For a closer look at Sag Harbor's March weather, you can visit this link: Sag Harbor weather in March.

In May, the weather shows a notable increase in temperature compared to April, with minimums rising from 0°C (33°F) in April to 4°C (39°F) and average temperatures climbing from 8°C (47°F) to 12°C (54°F). The maximum temperature also sees an improvement, reaching up to 20°C (69°F) in May, compared to 16°C (61°F) in April. However, both months experience significant precipitation, with May recording 129 mm (5.1 in) over 13 days, slightly less than April's 137 mm (5.4 in) over 12 days. Humidity levels decrease slightly from 79% in April to 75% in May, indicating a gradual shift toward drier conditions. For a more detailed look at April's conditions, check out Sag Harbor weather in April.

In comparing the weather of May and June, you can see a distinct transition towards warmer temperatures and reduced rainfall. May features a minimum temperature of 4°C (39°F), with an average of 12°C (54°F) and a maximum of 20°C (69°F), accompanied by a high precipitation level of 129 mm (5.1 in) over 13 days. In contrast, June enjoys a milder climate with minimum temperatures rising to 11°C (52°F), an average of 18°C (64°F), and reaching a maximum of 24°C (75°F). Additionally, June sees a significant decrease in precipitation, totaling 72 mm (2.9 in) over just 8 days. The humidity also remains fairly consistent, slightly increasing from May to June at 75% and 78% respectively. For more specific details on June weather patterns, you can check out Sag Harbor weather in June.

May and July present quite a contrast in weather patterns. In May, temperatures range from a chilly 4°C (39°F) at night to a mild 20°C (69°F) during the day, with an average of 12°C (54°F). The month is also characterized by higher precipitation, totaling 129 mm (5.1 in) over about 13 days, coupled with a humidity level of 75%. In contrast, July offers warmer temperatures, with nighttime lows of 16°C (61°F) and daytime highs reaching 28°C (82°F), averaging around 22°C (72°F). Precipitation decreases in July to 99 mm (3.9 in) spread over just 10 days, while humidity remains relatively consistent at 76%. This shift from the cool, wetter days of May to the warm, drier climate of July is quite notable. For more detailed information, you can refer to Sag Harbor weather in July.

May and August exhibit quite different weather patterns, highlighting the transition from spring to summer. In May, temperatures range from a cool minimum of 4°C (39°F) to a comfortable maximum of 20°C (69°F), with an average of 12°C (54°F). The month experiences significant precipitation, with 129 mm (5.1 in) falling over 13 days, while humidity remains relatively high at 75%. In contrast, August brings warmer temperatures, with a minimum of 17°C (63°F) and a maximum of 27°C (80°F), averaging around 23°C (73°F). This month experiences less precipitation at 103 mm (4.0 in) over only 9 days, and humidity slightly increases to 76%. For further details, check out Sag Harbor weather in August.

May and September present contrasting weather patterns as spring transitions into fall. In May, temperatures range from a chilly 4°C (39°F) at the lowest to a comfortable 20°C (69°F) at the highest, with an average of 12°C (54°F). The month sees considerable precipitation, totaling 129 mm (5.1 in) over 13 days, contributing to humidity levels that hover around 75%. In comparison, September enjoys more consistently warmer weather, with temperatures ranging from a minimum of 12°C (55°F) to a maximum of 26°C (79°F) and an average of 20°C (69°F). The month is also drier, with only 99 mm (3.9 in) of precipitation over 10 days, while maintaining the same humidity level of 75%. For more on the September climate specifics, check out Sag Harbor weather in September.

When comparing the weather in May and October, both months exhibit a similar humidity level of 75%, contributing to a comfortable feel in the air. However, May tends to be cooler, with average temperatures ranging from a minimum of 4°C (39°F) to a maximum of 20°C (69°F), while October sees a rise in temperature, averaging between 5°C (42°F) and 24°C (75°F). Precipitation is slightly higher in October, with 160 mm (6.3 in) over 14 days, compared to May's 129 mm (5.1 in) over 13 days. For more specific details, you can visit Sag Harbor weather in October.

May and November present contrasting weather patterns. In May, the temperatures range from a minimum of 4°C (39°F) to a comfortable maximum of 20°C (69°F), with an average temperature of 12°C (54°F). The month is relatively wet, receiving about 129 mm (5.1 in) of precipitation over 13 days, and the humidity levels are around 75%. In contrast, November experiences cooler temperatures, with a minimum dipping to -5°C (24°F) and a maximum of 19°C (67°F), resulting in an average of 10°C (50°F). While it is slightly drier with 113 mm (4.4 in) of precipitation on 10 days, November's humidity increases to 80%. For more details on December conditions, you can explore Sag Harbor weather in November.

May and December offer strikingly different weather patterns. In May, temperatures typically range from a minimum of 4°C (39°F) to a comfortable average of 12°C (54°F), peaking at 20°C (69°F). The month experiences moderate precipitation of 129 mm (5.1 in) over about 13 days, accompanied by a humidity level of 75%. In contrast, December's temperatures are much colder, with a minimum of -9°C (16°F) and an average of 5°C (42°F), reaching a maximum of 16°C (61°F). Precipitation is slightly higher at 147 mm (5.8 in) over 12 days, and humidity increases to 80%. For more details about December weather, check out Sag Harbor weather in December.

Compare Sag Harbor's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in Sag Harbor

As spring unfolds in Sag Harbor, May brings a noticeable shift in weather patterns compared to the chillier months leading up to it. With gradually rising temperatures, the average warmth invites outdoor activities, while the increased humidity can add a touch of stickiness to the air. While May sees a fair share of rainfall, it marks the beginning of a transition toward the warmer, sunnier days of summer. This blend of pleasant warmth and refreshing showers enhances the vibrant foliage and blooming flowers, making it an ideal time to explore the beauty of this charming harbor town. For a deeper dive into the weather trends throughout the year, visit Sag Harbor Climate.