May Weather in Bar Harbor, United States

Last updated: February 24, 2025

In May, Bar Harbor experiences a delightful transition into spring, with maximum temperatures reaching up to 25°C (78°F) and an average temperature around 11°C (52°F). The month is characterized by a mild climate, with minimum temperatures dipping to 2°C (36°F). Despite the pleasant warmth, visitors should prepare for occasional showers, as precipitation amounts average 92 mm (3.6 in) over 11 days. With a relatively high humidity level of 76%, the air can feel both refreshing and vibrant. May in Bar Harbor offers a beautiful setting for outdoor adventures, making it a wonderful time to explore this charming coastal town.

May Temperature in Bar Harbor

In May, Bar Harbor experiences a significant warming trend, with temperatures rising from a chilly average of 6°C (43°F) in April to a pleasant 11°C (52°F). The month heralds the arrival of spring, as minimum temperatures hover around 2°C (36°F) and maximums can reach a delightful 25°C (78°F). This shift marks a stark contrast to the winter months, where temperatures often dip below freezing, making May an enticing time for outdoor exploration. As nature bursts into bloom, outdoor activities become more enjoyable, and the crisp, refreshing air invites visitors to experience the beauty of this coastal gem.

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

The chart illustrates May temperature patterns in Bar Harbor, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec252632425261676861524030
Data source: Temperature data for Bar Harbor 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 Bar Harbor

In May, Bar Harbor experiences a moderate rainfall totaling 92 mm (3.6 in) over approximately 11 days. This month continues the trend established in April, where precipitation peaks at 129 mm (5.1 in) across a similar number of days. Compared to the drier months of March and June, which both see lower totals and fewer precipitation days, May stands out as a transitional period. As spring gives way to summer, the rainfall in May is significant, yet it remains relatively consistent with the earlier spring months, suggesting a gradual shift towards drier conditions in the upcoming summer. The patterns observed in May reflect Bar Harbor's characteristic variability, serving as a reminder of the region's lush, vibrant landscape nurtured by this timely moisture.

May Precipitation Trends in Bar Harbor

The chart displays monthly precipitation patterns in Bar 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.
JanFebMarAprMayJunJulAugSepOctNovDec9890731309279807395107131138
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Bar Harbor

As spring unfolds in Bar Harbor, May brings a welcome decrease in humidity, dropping to a comfortable 76%. This transition marks a shift from the higher humidity levels typical of winter months, such as 88% in January and February, and shows a steady decline through the warmer months, including April's 81%. The trend of decreasing humidity continues into June and July, remaining stable at 74%, making May a delightful time for outdoor activities. As summer approaches, the air becomes less humid, providing a refreshing atmosphere perfect for enjoying Bar Harbor's natural beauty.

May Average Humidity in Bar Harbor

This chart illustrates the average monthly humidity levels in Bar 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.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%85%81%76%74%74%74%77%82%85%84%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Bar Harbor

As May unfolds in Bar Harbor, the UV Index climbs dramatically to 9, marking it as a period of very high sun exposure. This sharp increase from April's moderate level signals a clear trend towards more intense sunlight as spring transitions into summer. With a burn time of just 15 minutes, outdoor enthusiasts should take extra precautions to protect their skin during this vibrant month. It's a stark reminder that the sun's rays become increasingly potent, particularly as we approach the summer months. Stay informed and enjoy your time in the sun safely by checking the latest updates on the Bar Harbor UV Index.

Maximum UV Index Levels in Bar Harbor for May

The chart shows the monthly maximum UV Index (UVI) for Bar 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.
JanFebMarAprMayJunJulAugSepOctNovDec2457910887532
Data source: Bar 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 Bar Harbor

As spring transitions into summer, May shines brilliantly in Bar Harbor, boasting an impressive 292 hours of sunshine. This delightful month serves as a precursor to the sun-drenched days of June and July, which steadily climb to 316 and 318 hours, respectively. Notably, after the gloomy winter months with only 141 hours in January, the increasing hours of sunlight reveal a vibrant trend that invigorates the coastal town. The warmth continues to build, peaking in August with 326 hours, before gradually tapering off in the fall. May stands out not just for its generous sunshine, but also as a pivotal moment where nature begins to awaken, enticing both locals and visitors to embrace the beauty of Bar Harbor and its radiant landscapes.

Monthly Sunshine Duration in Bar Harbor: May Highlighted

The May sunshine duration represents the total number of hours Bar 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.
JanFebMarAprMayJunJulAugSepOctNovDec141h188h257h244h292h316h318h326h281h224h184h170h
Data source: Bar Harbor May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Bar Harbor During May

In Bar Harbor, the likelihood of sunny weather in May registers at only 36%, reflecting a slight dip compared to the colder months of March and April, which boast higher sunny chances at 57% and 34%, respectively. As spring unfolds, May typically offers a blend of variable weather, with occasional sunny days that hint at the approaching summer. Notably, while May's sunshine potential is modest, it remains consistent with the overall trend seen as the seasons shift, where the summer months like July and August plummet to 25% and 31% sunshine, suggesting that Bar Harbor might experience more variable, overcast days as summer progresses. Thus, while May may not guarantee abundant sunshine, it does provide a gentle transition into brighter days ahead.

Percentage of Sunny Days in May in Bar Harbor

The chart illustrates the percentage of sunny days in Bar 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 Bar Harbor experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec41%38%57%34%36%39%25%31%39%43%55%39%
Data source: Bar Harbor May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Bar Harbor in May

As spring unfolds in Bar Harbor, May brings a delightful increase in daylight hours, offering 14 hours of sunlight for residents and visitors to enjoy. This trend follows a gradual rise from the 9 hours in January, signaling the end of winter's grip. Each month sees an uptick, with daylight duration jumping from 11 hours in March to 13 in April, before reaching its peak in June at 15 hours. As summer settles in, daylight begins its slow decline, yet May stands out as a vibrant time of year filled with outdoor possibilities and an invigorating sense of renewal. Watching the sun linger longer in the sky serves as a joyful reminder that the warmer months are just around the corner.

Average Daylight Hours in Bar Harbor for May

The chart illustrates the variation in daylight duration in Bar 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 15m10h 27m11h 57m13h 29m14h 48m15h 28m15h 6m13h 56m12h 27m10h 55m9h 34m8h 52m
Data source: Bar Harbor daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Bar Harbor

In May, Bar Harbor experiences a gentle breeze with an average wind speed of 3.9 m/s (9 mph), marking a slight dip from the gustier spring months of March and April. This transitional period suggests a calming of the winds as summer approaches, a characteristic trend in Bar Harbor’s climate. Notably, the wind speeds are among the lowest of the year, continuing a gradual decline from April's 4.5 m/s (10 mph) and hinting at the sheltered experiences that visitors can expect in the warm, bustling summer months ahead. The diminishing winds provide a serene backdrop, perfect for exploring the beauty of the coastal landscape and enjoying the vibrant outdoor activities that May has to offer.

Average May Wind Speed in Bar Harbor

The chart displays monthly wind speed patterns in Bar 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.44.25.14.53.9 m/s4.13.42.93.73.84.34.6
Data source: Bar Harbor May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Bar Harbor Compares to Other Months

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

May and January present stark contrasts in weather. In May, temperatures range from a chilly 2°C (36°F) at night to a pleasant maximum of 25°C (78°F) during the day, with an average of 11°C (52°F). This month experiences moderate precipitation at 92 mm (3.6 in) over around 11 days, alongside humidity levels at 76%. In contrast, January is much colder, with temperatures plunging to a minimum of -23°C (-8°F) and peaking at just 11°C (51°F). The average temperature rests at a frigid -4°C (25°F), and while precipitation is slightly higher at 98 mm (3.9 in), it occurs over fewer days (9 days) and with higher humidity at 88%. For more detailed information, check out Bar Harbor weather in January.

May and February present striking contrasts in weather conditions. In May, temperatures range from a minimum of 2°C (36°F) to a pleasant maximum of 25°C (78°F), with an average of 11°C (52°F). The month sees about 92 mm (3.6 in) of precipitation over 11 days, accompanied by a relatively comfortable humidity level of 76%. In contrast, February experiences much colder conditions, with temperatures dipping as low as -20°C (-4°F) and averaging -3°C (26°F), peaking at 13°C (56°F). Precipitation remains similar at 90 mm (3.6 in) over 10 days, but humidity is slightly higher at 88%. For a more detailed look at February's weather, you can check Bar Harbor weather in February.

In comparing the weather between March and May, it’s clear that May offers a significant transition towards warmer conditions. While March experiences colder temperatures, ranging from a minimum of -18°C (0°F) to a maximum of 14°C (58°F) with an average of 0°C (32°F), May sees a much milder temperature range, with lows of 2°C (36°F) and highs reaching 25°C (78°F), averaging at 11°C (52°F). Additionally, March has higher humidity levels at 85%, compared to May's 76%, although May experiences more rainfall with 92 mm (3.6 in) over 11 days versus March's 73 mm (2.9 in) over 9 days. For a closer look at March weather specifics, check out Bar Harbor weather in March.

May generally features milder temperatures compared to April, with minimums rising from -4°C (24°F) in April to 2°C (36°F) in May. The average temperature also increases significantly from 6°C (43°F) in April to 11°C (52°F) in May, peaking at a comfortable 25°C (78°F). However, while May experiences slightly less precipitation, totaling 92 mm (3.6 in) over 11 days, April has a higher total of 129 mm (5.1 in) over 13 days. Additionally, humidity in May averages 76%, marginally lower than April's 81%. For a closer look at April's weather specifics, visit Bar Harbor weather in April.

May and June display notable differences in weather patterns. In May, temperatures range from a chilly minimum of 2°C (36°F) to a maximum of 25°C (78°F), with an average of 11°C (52°F). The month experiences higher precipitation with 92 mm (3.6 in) spread across 11 days and a relative humidity of 76%. In contrast, June features milder temperatures, with a minimum of 6°C (42°F) and a pleasant maximum of 30°C (86°F), leading to a comfortable average of 16°C (61°F). The precipitation decreases to 79 mm (3.1 in), spread over just 9 days, and the humidity slightly drops to 74%. For more specific details about June weather, you can visit Bar Harbor weather in June.

In May, temperatures begin to warm up, with a minimum of 2°C (36°F) and an average of 11°C (52°F). The month experiences a maximum temperature of 25°C (78°F) along with 92 mm (3.6 inches) of precipitation over 11 days, resulting in relatively high humidity at 76%. In contrast, July boasts significantly warmer conditions, with a minimum temperature of 11°C (53°F) and an average of 19°C (67°F), peaking at 30°C (86°F). While July sees slightly less precipitation at 80 mm (3.2 inches) over just 10 days, the humidity drops slightly to 74%. For further insights on July weather specifics, visit Bar Harbor weather in July.

May and August present contrasting weather patterns. In May, temperatures can range from a chilly 2°C (36°F) to a pleasant 25°C (78°F), with an average of 11°C (52°F). The month also experiences significant rainfall, with 92 mm (3.6 in) of precipitation over 11 days, and the humidity hovers around 76%. In contrast, August offers a warmer climate, with minimum temperatures of 12°C (53°F), averaging 20°C (68°F), and reaching up to 29°C (85°F). Precipitation is less frequent in August, totaling 73 mm (2.9 in) over 8 days, and humidity remains slightly lower at 74%. For more specifics on August weather, you can check Bar Harbor weather in August.

May and September present distinctive yet somewhat similar weather patterns. In May, temperatures range from a cool minimum of 2°C (36°F) to a comfortable maximum of 25°C (78°F), with an average of 11°C (52°F). The month experiences notable precipitation, with 92 mm (3.6 in) falling over 11 days, and humidity levels hovering at 76%. In contrast, September offers slightly warmer conditions, with temperatures varying from a minimum of 5°C (42°F) to a high of 27°C (81°F) and an average of 16°C (61°F). It sees a comparable amount of precipitation at 95 mm (3.7 in), but over fewer days—just 7. Humidity remains fairly stable at 77%. Overall, while May showcases a cooler and wetter climate, September brings warmer temperatures and less frequent rain. For more specific weather details, you can check Bar Harbor weather in September.

May and October exhibit distinct weather patterns, despite having similar average temperatures of 11°C (52°F). In May, temperatures can range from a chilly 2°C (36°F) to a warm 25°C (78°F), while October's temperatures are cooler, with minimums around 0°C (32°F) and maximums reaching 21°C (70°F). Precipitation is slightly higher in October, with 107 mm (4.2 in) compared to May’s 92 mm (3.6 in), although both months see rain on around 11 days. Additionally, October experiences higher humidity at 82% versus May’s 76%. For more details on October weather, check out Bar Harbor weather in October.

May and November present contrasting weather patterns, reflecting the transition from spring to late autumn. In May, temperatures range from a minimum of 2°C (36°F) to a comfortable maximum of 25°C (78°F), with an average of 11°C (52°F), and the month sees about 92 mm (3.6 in) of precipitation over approximately 11 days. The humidity is relatively high at 76%, contributing to a pleasant but sometimes damp atmosphere.

In contrast, November experiences lower temperatures, with a minimum of -15°C (6°F) and a maximum of 17°C (63°F), culminating in an average of just 4°C (40°F). Precipitation increases to 130 mm (5.1 in) over 12 days, and humidity rises to 85%, often resulting in a colder and wetter environment. For more detailed insights into November's weather, you can check out Bar Harbor weather in November.

May and December present strikingly contrasting weather conditions. In May, temperatures vary from a cool 2°C (36°F) at night to a pleasant average of 11°C (52°F) during the day, reaching up to a warm 25°C (78°F) at times. The month experiences around 92 mm (3.6 in) of precipitation over 11 days, with a humidity level of 76%. In contrast, December plunges into much colder conditions, with temperatures dipping as low as -22°C (-7°F) and averaging -1°C (30°F), peaking at 15°C (59°F). This month sees increased precipitation at 138 mm (5.4 in) over the same number of rainy days, coupled with higher humidity at 84%. For more detailed insights into December weather, you can visit Bar Harbor weather in December.

Compare Bar Harbor's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in Bar Harbor

As May unfolds in Bar Harbor, it brings a refreshing transition from the chill of winter to the warmth of summer. With an average temperature significantly higher than the preceding months, visitors can expect a delightful mix of sunny days and mild evenings. However, the month also sees increased precipitation, with about a third of the days experiencing rain, contributing to the region's lush landscapes. The humidity adds to the vibrant atmosphere, making May a captivating time to explore the stunning coastline and natural beauty of the area. For a deeper insight into how May weather fits into the broader climate patterns, check out Bar Harbor Climate.