May Weather in Grand Marais, United States

Last updated: February 24, 2025

May in Grand Marais, United States, brings a refreshing mix of temperatures and weather patterns as spring transitions into early summer. With a maximum temperature reaching 17°C (63°F) and an average temperature of 7°C (44°F), residents can expect mild days, alongside the occasional chill, with a minimum temperature plummeting to -4°C (26°F). The month sees about 67 mm (2.6 in) of precipitation, spread over 10 days, resulting in a humid atmosphere with an average humidity of 76%. This combination of cooler temperatures and significant rainfall creates a lush backdrop, perfect for outdoor adventures while enjoying the vibrant beauty of Grand Marais.

May Temperature in Grand Marais

As May unfolds in Grand Marais, U.S., temperatures begin to showcase a promising shift toward warmth after the harshness of winter. The month starts with a minimum dipping to -4°C (26°F) but quickly rises, culminating in pleasant daytime highs around 17°C (63°F). With an average temperature of 7°C (44°F), May acts as a transitional phase, where the lingering chill of early spring gives way to a taste of summer's embrace. This gradual warming trend sets the tone for the upcoming months, inviting both locals and visitors to revel in the natural beauty and outdoor activities that the region has to offer as it shakes off the winter freeze.

May Weather in Grand Marais: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Grand Marais, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec151426344452606256453121
Data source: Temperature data for Grand Marais 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 Grand Marais

May in Grand Marais brings a noteworthy shift in precipitation, with 67 mm (about 2.6 inches) of rain recorded over 10 days. This marks a continuation of a trend established in April, where the same amount of precipitation was observed. As spring fully settles in, the frequency of rainy days increases, providing a lush backdrop to the vibrant blooming landscape. Compared to the drier months of winter, May’s rainfall supports the region's natural beauty, hinting at a gradual rise towards June's expected 69 mm (or 2.7 inches) as the summer approaches. The increasing precipitation not only nourishes the earth but also creates a dynamic environment for outdoor activities and exploration, highlighting the rhythm of spring in this charming locale.

May Precipitation Trends in Grand Marais

The chart displays monthly precipitation patterns in Grand Marais, 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.
JanFebMarAprMayJunJulAugSepOctNovDec33404267676963781031025563
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Grand Marais

In May, Grand Marais experiences a noticeable shift in humidity, dropping to 76%, which marks a gradual transition from the high moisture typical of winter months. This decline from 85% in April reflects the arrival of warmer and drier spring air, setting the stage for the summer season ahead. As the humidity continues to decrease through June and July, when it dips to around 70%, residents and visitors alike can relish the more comfortable climate. This trend of diminishing humidity in May not only enhances outdoor activities but also highlights the region's appealing seasonal changes.

May Average Humidity in Grand Marais

This chart illustrates the average monthly humidity levels in Grand Marais, 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.
JanFebMarAprMayJunJulAugSepOctNovDec93%93%89%85%76%71%70%71%73%82%88%91%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Grand Marais

As May rolls in, residents and visitors in Grand Marais, US, can expect a significant uptick in UV exposure, with the UV Index surging to a striking 8, categorized as very high. This marks a stark contrast from the earlier months; in January, the Index sat at a mere 2, indicating low exposure. As spring progresses, the Index increases steadily, culminating in May, where the burn time drops to just 15 minutes. Such a trend underscores the importance of sun protection, as the region shifts from moderate exposure in March to a more intense risk in May. Enjoy the sunny days, but don't forget the sunscreen! For more details, check the Grand Marais UV Index.

Maximum UV Index Levels in Grand Marais for May

The chart shows the monthly maximum UV Index (UVI) for Grand Marais 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.
JanFebMarAprMayJunJulAugSepOctNovDec245689987521
Data source: Grand Marais 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 Grand Marais

May in Grand Marais heralds the peak of sunshine, basking in 309 hours of radiant light, making it a perfect month to indulge in outdoor adventures. Following the steady climb from January's modest 114 hours, daylight grows more abundant, with March and April each enjoying 254 hours. This upward trend culminates in May, embracing nearly an hour more than April and setting the stage for the sunniest season. The warmth of June quickly follows, boasting 347 hours, as the days stretch even longer. However, as summer fades, sunshine begins to recede, reminding us of the cyclical nature of the seasons, with hours gradually declining through September and into the cozy climates of fall. Grand Marais transforms from a sun-kissed getaway to a serene retreat, showcasing the unique charm of each season.

Monthly Sunshine Duration in Grand Marais: May Highlighted

The May sunshine duration represents the total number of hours Grand Marais 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.
JanFebMarAprMayJunJulAugSepOctNovDec114h195h254h254h309h347h357h320h253h187h147h136h
Data source: Grand Marais May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Grand Marais During May

As spring unfolds in Grand Marais, the likelihood of sunny weather reaches a promising 44% in May, making it a delightful time for outdoor activities. This month sees a subtle rise in sunshine compared to the previous months, jumping from 33% in April and showcasing a steady increase from the colder winter months, where the chances lingered around a mere 25%. The approach of summer brings with it a burgeoning brightness, as June holds steady at 44%, setting the stage for July and August, where sunny days become even more frequent. With this trend, May stands out as a delightful prelude to the sunnier months, inviting residents and visitors alike to enjoy the awakening beauty of the season.

Percentage of Sunny Days in May in Grand Marais

The chart illustrates the percentage of sunny days in Grand Marais 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 Grand Marais experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec26%25%45%33%44%44%64%56%49%31%32%17%
Data source: Grand Marais May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Grand Marais in May

In Grand Marais, United States, May marks a delightful transition into longer days, with an impressive 15 hours of daylight. This increase is part of a clear upward trend, beginning with just 8 hours in January and gradually rising through the spring. By April, the days stretch to 13 hours, setting the stage for May's peak daylight hours which are mirrored again in June and July. As summer progresses into August, we see a slight decline to 14 hours, signaling the gradual retreat of daylight in the months to come. This rhythmic ebb and flow of daylight hours not only enhances the beauty of the changing seasons but also invites outdoor exploration and activities as the days grow longer and warmer.

Average Daylight Hours in Grand Marais for May

The chart illustrates the variation in daylight duration in Grand Marais throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 53m10h 15m11h 56m13h 40m15h 10m15h 55m15h 30m14h 10m12h 30m10h 46m9h 15m8h 27m
Data source: Grand Marais daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Grand Marais

In May, Grand Marais experiences a gentle decline in wind speed, averaging 3.7 m/s (8 mph), making it one of the calmer months of the year. This pattern marks a noticeable shift from the cooler spring months, where winds were slightly brisker, with April reaching 4.5 m/s (10 mph). As the transition to summer begins, the coastal breezes soften, inviting residents and visitors alike to enjoy the pleasant outdoors without the relentless gusts of previous months. The trend continues into June, which sees an even lighter average of 3.4 m/s (8 mph). This seasonal calm not only enhances the beauty of the landscapes but also creates a serene atmosphere, perfect for exploring all that Grand Marais has to offer during this delightful time of year.

Average May Wind Speed in Grand Marais

The chart displays monthly wind speed patterns in Grand Marais, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.85.15.24.53.7 m/s3.43.34.44.04.35.76.0
Data source: Grand Marais May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Grand Marais Compares to Other Months

The weather in Grand Marais 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 Grand Marais and find detailed weather information for every month.

When comparing the weather in May and January, there’s a stark contrast in temperature and conditions. May typically offers a range of temperatures from a chilly minimum of -4°C (26°F) to a pleasant maximum of 17°C (63°F), with an average temperature of around 7°C (44°F). In contrast, January experiences much colder weather, with minimum temperatures plummeting to -28°C (-19°F) and an average temperature of -9°C (15°F), peaking at only 3°C (38°F). While May sees 67 mm (2.6 in) of precipitation over about 10 days, January is comparatively drier with just 33 mm (1.3 in) over 7 days. Additionally, January's humidity levels are notably higher at 93%, compared to 76% in May. For more details on January weather, visit Grand Marais weather in January.

Comparing the weather in May and February reveals a significant contrast in temperatures and precipitation. May experiences milder conditions, with average temperatures ranging from -4°C (26°F) to 17°C (63°F) and about 67 mm (2.6 in) of precipitation over approximately 10 days. In contrast, February is much colder, featuring a minimum temperature of -29°C (-20°F) and an average of -10°C (14°F), with a maximum of just 7°C (44°F). Precipitation in February is lower at 40 mm (1.6 in) over 9 days, yet the humidity is notably high at 93%. For more detailed information, you can check Grand Marais weather in February.

When comparing the weather between March and May, it is evident that May is significantly milder. In March, temperatures can plunge as low as -23°C (-10°F), with an average temperature of -4°C (26°F) and a maximum of only 8°C (47°F). In contrast, May sees temperatures ranging from a minimum of -4°C (26°F) to an average of 7°C (44°F) and peaking at 17°C (63°F). Additionally, May experiences more precipitation, totaling 67 mm (2.6 in) over 10 days, compared to March's 42 mm (1.6 in) which falls over just 6 days. While March has a higher humidity level at 89%, May's humidity remains relatively high at 76%, contributing to a more comfortable atmosphere. For more detailed information on March weather, you can check Grand Marais weather in March.

In comparing the weather between April and May, it is evident that May offers a noticeable improvement in temperature, with daily averages rising from 1°C (34°F) in April to 7°C (44°F). The minimum temperatures are also milder in May, reaching -4°C (26°F) compared to April's colder lows of -11°C (12°F). Despite experiencing similar levels of precipitation—67 mm (2.6 in) in both months—May has rain spread over about 10 days, slightly more than April's 9 days. Additionally, humidity decreases from 85% in April to 76% in May, making late spring feel more comfortable. For those interested in exploring specific April conditions, further information can be found at Grand Marais weather in April.

May and June exhibit a notable transition in weather patterns. In May, temperatures fluctuate between a chilly minimum of -4°C (26°F) and a pleasant maximum of 17°C (63°F), with an average of 7°C (44°F). The month experiences considerable precipitation, totaling 67 mm (2.6 in) over approximately 10 days, coupled with a relatively high humidity level of 76%.

In contrast, June ushers in milder conditions, with temperatures ranging from a minimum of 3°C (37°F) to a maximum of 21°C (71°F), averaging 11°C (53°F). The month sees a slight increase in precipitation to 69 mm (2.7 in) across about 11 days, but humidity drops to 71%, making the air feel more comfortable. For a closer look at June's weather specifics, visit Grand Marais weather in June.

May and July present contrasting weather characteristics in Grand Marais. In May, temperatures can dip as low as -4°C (26°F), with an average of 7°C (44°F) and a maximum of 17°C (63°F). Precipitation is relatively high with 67 mm (2.6 in) falling over 10 days, and humidity levels are quite high at 76%. In contrast, July warms up significantly, with minimum temperatures of 7°C (46°F), an average of 16°C (60°F), and a maximum of 25°C (77°F). Precipitation in July is slightly less at 63 mm (2.5 in) over 8 days, and humidity decreases to 70%. For a detailed look at July weather, visit Grand Marais weather in July.

May presents a cooler climate compared to August, with temperatures ranging from a chilly minimum of -4°C (26°F) to a moderate maximum of 17°C (63°F) and an average of 7°C (44°F). In contrast, August enjoys milder temperatures, with a minimum of 10°C (50°F), an average of 17°C (62°F), and a peak of 25°C (77°F). While both months experience precipitation over approximately ten days, May records 67 mm (2.6 in) of rain, slightly less than August's 78 mm (3.1 in). Additionally, humidity levels are higher in May at 76%, compared to 71% in August. For more detailed information, you can visit Grand Marais weather in August.

May and September offer contrasting weather experiences. In May, temperatures range from a chilly minimum of -4°C (26°F) to a pleasant maximum of 17°C (63°F), with an average of 7°C (44°F). The month sees about 67 mm (2.6 in) of precipitation spread over approximately 10 days, coupled with a relatively high humidity of 76%. In contrast, September enjoys milder temperatures, with minimums around 2°C (36°F) and maximums reaching up to 23°C (73°F), averaging 13°C (56°F). This month experiences more rainfall at 103 mm (4.1 in) over about 12 days, though humidity is slightly lower at 73%. For more details on the weather during September, you can check out Grand Marais weather in September.

In May, temperatures in Grand Marais range from a minimum of -4°C (26°F) to a maximum of 17°C (63°F), with an average of 7°C (44°F). The month experiences around 67 mm (2.6 in) of precipitation over about 10 days, along with a humidity level of 76%. By contrast, October sees slightly cooler temperatures, with a minimum of -5°C (24°F), an average of 7°C (45°F), and a maximum of 18°C (64°F). However, October is wetter, receiving 101 mm (4.0 in) of precipitation over 12 days, with increased humidity at 81%. For more detailed information, you can check Grand Marais weather in October.

May and November exhibit contrasting weather patterns, reflecting the transition from spring to late autumn. In May, temperatures range from a minimum of -4°C (26°F) to a maximum of 17°C (63°F), with an average of 7°C (44°F). The month sees about 67 mm (2.6 in) of precipitation over 10 days, coupled with a humidity level of 76%. In stark contrast, November experiences much chillier conditions, with temperatures dipping as low as -14°C (7°F) and an average of -1°C (31°F). The maximum temperature reaches only 13°C (55°F). While precipitation decreases slightly to 54 mm (2.1 in) over 9 days, humidity rises to 87%, adding to the crisp atmosphere. For a detailed look at November weather specifics, you can visit Grand Marais weather in November.

May and December present stark contrasts in weather conditions. In May, temperatures range from a chilly -4°C (26°F) at night to a pleasant 17°C (63°F) during the day, with an average of 7°C (44°F). The month sees moderate precipitation of 67 mm (2.6 in) over about 10 days, accompanied by a humidity level of 76%. In contrast, December brings much colder temperatures, with nighttime lows plummeting to -27°C (-16°F) and daytime highs only reaching up to 9°C (48°F), averaging -6°C (21°F). While December has slightly less precipitation at 63 mm (2.5 in), it also experiences similar precipitation days (10), but with a notably higher humidity of 91%. For more details on December weather patterns, check out Grand Marais weather in December.

Compare Grand Marais's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in Grand Marais

As spring fully unfolds in Grand Marais, May brings a delightful shift in weather patterns compared to the chillier months. Temperatures rise pleasantly, with daily averages inviting locals and visitors alike to enjoy the great outdoors, while the lingering cool nights remind us that winter's grip is finally loosening. However, occasional rain showers can dampen plans, making it one of the wetter months, contributing to the region's lush landscapes. With humidity high, the air feels more vibrant, enhancing the sensory experience of nature blooming around you. For a deeper dive into what to expect throughout the year, visit Grand Marais Climate.